Do you know Jesus Christ can set you free from sins and save you from hell today Jesus Christ is the only hope in this world no other gods will lead you to heaven There is no security or hope with out Jesus Christ in this world come and repent of all sins today Today is the day of salvation come to the loving savior Today repent and do not go to hell Come to Jesus Christ today Jesus Christ is only way to heaven Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void Heaven and hell is real cone to the loving savior today Today is the day of salvation tomorrow might be to late come to the loving savior today Romans 6.23 For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. John 3:16-21 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. Mark 1.15 15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel. 2 Peter 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. Hebrews 11:6 6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him. Jesus
Is there any long term chemical testing on carbon fiber and your resins to see if long term exposure to Kerosene will weaken you wing in any way, or dissolve things into the fuel?
#1 Kerosene is utterly benign to cured laminating epoxies and #2, they aren't burning Kerosene... So you might want to ask about Gasoline. #3, Gasoline is utterly benign to cured laminating epoxies commonly available. Specifically, it is not the gasoline which hurts chemically but rather the additives. I am sure somewhere there is an exception for long term gasoline storage, but I have never heard of one.
The engine they're using has an autogas STC, but they have stated they won't be supporting that because the resin isn't compatible with the ethanol content present in most available gasoline in USA. You can get certified ethanol-free gas, aimed at the marine market I believe. I wonder if that application could be a good option.
Uh... well that is stupid as Methanol/Ethanol or Iso propyl alcohol are benign to epoxies when the epoxy is cured. IF EITHER is present DURING the curing process then and ONLY then will strength be severely effected based on how much of either alcohol type is present to "thin" the mixture down. True if using any Ketone as well as a thinner agent.Often people use alcohol's in epoxy when pouring or spraying as it breaks surface tension properties creating a smooth finish. If too much is present, the epoxy in question will not fully cure and strength etc properties are lost. @@g.tucker8682
This reminds me of the wet wing design of the BD-4. How do you handle with sucking air during maneuvers when you unport the fuel pickups? This required either a header tank or droop pickups to prevent the issue in the BD-4.
Great question! The short answer is the fuel system utilizes a central sump (header) to keep the fuel pickups from unporting. We discuss the fuel system architecture in detail in this video: ruclips.net/video/kVOEJPPR60U/видео.html
@@DarkAeroInc aircraft looks very beautiful with the paint job but have you thought about covering the interior of the aircraft with paint as uv might go through the canopy and affect the resin. btw I really appreciate the knowledege you share Thank you.
Wwould appreciate if made in an option on your website to see the specs in Metrics :) (Or better way, a hybrid that aviation actually uses.. Nm, Kg and Meters... :) ) Looks like a beutiful litle airplane
Awesome development work, thank you. It would be great to understand how versioning, release management and bills of materials (BOMs) work in your life-safety development and manufacturing environment. Particularly: * Versioning: assessment of each version's backwards-compatibility/SEMVER. * Internal Release Management: internal/engineering with internal versioned product codes. * How do you structure and maintain the multi-level BOM structures needed for managing the "assemblies of assemblies" of engineered products? It is critically important to isolate the production/factory and parts-purchasing customers from having to understand versioning. * External release (release for Sale): how are the internal versioned product codes linked to the Sales product codes that customers see? * Some discussion of the importance of 'immutability' for both the source files (source, CAD etc used by developers) and the object files (binaries, CNC files used by the factory and out-work) are achieved would be great too.
Great comment. I think the one question I would add to your list that would be cool to know is how many bananas long the plane is from prop to tail? Maybe show a banana for scale.
Im an engineer and started a design of ultralight aircraft of 100% carbon fiber construction, several companies in Europe are doing this but I cant find anyone in the states doing this, compare Europe to USA in aviation design they (Europe) are way ahead of us. I based my design off of Burt Rutan builds, but Im using carbon fiber ribs, and aluminum I-beam front spar and rear spar is carbon fiber, with CNC hot wire foam core in between each rib and carbon fiber skins, and its made weight to qualify for UL part 103, so I passed the first challenge of making weight in the wing section, now working on fuselage and tail section, all on solidworks and OPEN VSP software
Good question! The "hump" is there to balance the aileron about its hinge line which helps prevent control surface flutter. This extra feature does increase drag when the aileron is deflected, but most of the time in flight the ailerons are at neutral deflection. Thanks for checking out the video!
prevents flutter. control surfaces need a counter weight there. if control surfaces get bigger it also helps with the power required to pull those control surfaces into position. only not needed on bigger aircraft who force control surfaces into position with hydraulics.
I’d love to hear more about the interaction of gasoline with the epoxy/composites, particularly over time? Some manufacturers have had LOTS of issues with built in tanks in the marine industry. Great work though, beautiful plane!!
Especially if an internal pinhole allows fuel to move into the honeycomb spaces when new and over time with degradation due to flex and heat. That is a huge internal surface area and linear distance of joints with a requirement for a perfect seal. At some point lots of joints will be slathered with epoxy and a giant skin will be pressed into place over very many longitudinal members. Can a perfect long-lasting seal be expected?
The old-fashioned way would be some sort of "tap" test. Many years ago I owned a Grumman TR2. The bonded joints were "tested" using a nickel on edge and an experienced set of ears. Perhaps someone could devise an ultrasound method to verify that the honeycomb has remained dry. @@onethousandtwonortheast8848
Sweet, I thought I saw them, but always better to ask the people who know! Thank you guys for doing such an instructive job, showing this whole process! @@DarkAeroInc
Yes, but some of the channels were lit in such a way that I could not tell if they were baffles or compartments or what. Also, DarkAero already nicely answered my question, so thanks for being needlessly aggressive.@@jayphilipwilliams
I hear there's now a market for a commercial airplane manufacturer in the U.S. that focuses on quality & safety. You guys should do a 200 person passenger jet next.
The mistakes at BO can be blamed on management, sure. But they were made by very small groups of individuals. I doubt more than two people were involved in the missing door bolts. One to forget them, and another to pencil whip the checklist documents. Two, possibly three lazy and foolish people caused that. And probably less than ten were involved in the MCAS implementation. The latter system was a hush-hush deal to satisfy certain draconian FAA type certificate regulations. Where the pitch-response and pitch up due to thrust had to meet certain criteria based on the original 737 type certificate tests, else suffer the laborious, multi-year, two dozen billion dollar punishment that is known as new type certification. And also re-training all crew for the new type rating, because of those handling differences. The MCAS system in its entirety could not be widely disclosed inside of Boeing, nor to the FAA, or to any pilots, when it was implemented by a select few individuals to satisfy those FAA handling requirements by an "other than permitted" manner. The reason it failed so catastrophically, is because it was directly tied to only 1 angle of attack vane-type sensor. But a system that can override the pilot and radically change pitch attitude based on AoA sensor data MUST be tied into no less than THREE sensors for redundancy. One, or Two is insufficient, because it wont know which to believe. It has to have three. This is not an area of expertise for computer programmers, who always and invariably expect everything to function flawlessly, and rarely consider failure modes. Since this was a secret project to remedy a potential issue with the FAA due to a change in handling, it was almost certainly kept secret and the appropriate departments were kept unaware and unable to double check this egregious error made by other departments who implemented this half baked idea. Boeing is to blame for this mistake. But the blame for Boing implementing MCAS on the 737MAX in the first place is actually the fault of the FAA.
Romans 6:23 For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord. Come to Jesus Christ today Jesus Christ is only way to heaven Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void Heaven and hell is real cone to the loving savior today Today is the day of salvation tomorrow might be to late come to the loving savior today John 3:16-21 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. Mark 1.15 15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel. 2 Peter 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. Hebrews 11:6 6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him. Jesus
@EllipsisAircraft Actually Boeing and MD have had many design faults that were ignored and resulted in lost lives over the decades. What has happened in the last couple of years is nothing new. Watch some air crash videos and you will see a history of wrong parts and design being ignored for profit.
Sorry, but I dig everything, but 100 octane is aggressive, maybe i missed something, maybe missed a Bladder discussion! I’ve been around race fuels , aviation fuel!, Acetone octane around 114(?)/zylene 116, toluene ?116/17, all these are aggressive on destroying epoxies etc! Those are materials used to bump octanes! (Safe your money at oreilys. If you dumping that in a composite structure expecting it to last!? Surely, I just let my patience miss something, surely and y’all not doing that?
Speaking of load testing. Since you guys have a wet wing, does the wing get load tested again with fuel to make sure it doesn't leak after an extreme load with fuel inside?
It's hard to tell in the video, but are you using a "Formula-style" harness? That under-the-leg anti-sub belt routing is only valid with a belt system designed for it (Formula or Schroth Hybrid), and should not be used with a standard 6-point system. Crow does make a Formula restraint. I'm not sure what the reasoning is for the different linkage, but would tend to trust the engineers that developed them given the amount of research and testing that goes into these restraints. Very exciting to see the progress!
I'm going with Crow 5-point for my RV-14 project. I have Hooker 5-point in my Decathlon. Hooker is of the highest quality and I'm happy with my harnesses, but they're a bit heavy for cross-country comfort (IMHO). Press on!
I know it's probably un-necessary for aviation, but have you considered a headrest for the seat? Seeing necks whip back on crash test footage without them always makes me cringe. (Granted if you ever crashed the DA1 you're probably going to need more than a headrest lol) Eagerly awaiting the first flight
Hey friends! I noticed your testing method for the anticipated hydrostatic pressure on the wing/tank. Do you plan on a full-scale loaded test on this wing at some point in the future? I am talking about a complete wing on a test stand held at an angle and torture tested with a fuel analog in place. Admittedly this is expensive and time consuming, but compared to the damage to your reputation later on it could be a good investment. What I am seeing is that you are not actually trying to find a failure mode and that is a concern.
We are working on that. $12-15k😮 (Assuming a plans built, alternative engine, single seat aircraft, 110ktas). For all others, 2 seats, fast. Cant beat the DA. It's going to cruise close to 250ktas.
It all looks pretty cool.. will you put some of the matrix samples from the composite in fuel, just as extra observation on long term wet wing effects?
Really looking forward to the maiden flight. Doing an incredible job. I really like this airframe. When done I would like a 3 view so I can build a scale Radio Control plane.
G,day fellas from Sydney Australia. Fantastic progress of your plane. I should have linked the seatbelt harness design to reduce impact trauma on the human body, in other words: safety, instead of sales and marketing. 🌏🇦🇺
I thought (and was taught) the belt was there to keep you in your seat in case of turbulence but preventing injuries in case of a crash and since you *are* the crumple zone... Do you have concrete evidence 6 point harnesses save lives on experimental aircrafts?
How many experimental aircraft offer a full carbon fiber tub? Compare this closer to a Formula-Ford. Reclined seats require the extra anti-submarine strap of a 6pt harness, for redundancy, and ability to locate pressure points on both sides of... centerline.
I notice that your clearance between the aileron counterweight and wing seems tight. Have you considered that moisture could propogate into that space and freeze? Locking up the controls. Just a consideration.
Jesus Christ is the only hope in this world no other gods will lead you to heaven There is no security or hope with out Jesus Christ in this world come and repent of all sins today Today is the day of salvation come to the loving savior Today repent and do not go to hell Come to Jesus Christ today Jesus Christ is only way to heaven Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void Heaven and hell is real cone to the loving savior today Today is the day of salvation tomorrow might be to late come to the loving savior today Holy Spirit Can give you peace guidance and purpose and the Lord will John 3:16-21 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. Mark 1.15 15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel. 2 Peter 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. Hebrews 11:6 6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him. Jesus
Glad to see your progress... It's been a while since I've seen a post... I've followed you nearly from the beginning, and your doggedness and discipline is exemplary.
You should consider a mans testies also. Multipoint harness isnt so bad if you weigh 40kg, but if you weigh more, ruptured testies are not uncommon. People may laugh, but many men would prefer a ruptured spleen to a ruptured testicle.
Hi I am very interested in your project DarkAero I just love how affordable it is and the range of the aircraft would you say this is a good beginner friendly aircraft I just can’t wait for the plane to be ready for its first journey through the skies and into everybody harts finally. Will the plane ever get a rocket propelled parachute system. Or BRS Aerospace: Whole Aircraft Rescovery Parachute Systems or does it already have one
Hoping for a larger content staff and more content on all the projects, IF you’re making money off content and it’s beneficial to the income stream supporting the projects velocity towards finish. Strong work
Incredibly well thought out program. A great way to design an aircraft. I think they call it systems integration. I call it the Right Way to build an aircraft. Good job!
Riley and Brothers May the Airplane Gods Watch Over You and Saint Michael be at your Side when you Do the Air Testing. I will always want to See the Mom and Pop shops show it still alive in America.
Can you guys design a way to carry skis and snowboards? Like that’s my biggest thing with small planes. I not only want one that does the things your plane will do, I want it to carry 2 snowboards.
The fuel tank in the wing with NO bladder, and trying to get the wing to seal correctly *WILL BE A NIGHTMARE* for builders. If a builder does not build the wing perfectly the way YOU have, it will not hold fuel. Your making/manufacturing an awesome aircraft, but your NOT thinking of your future builders. Fuel in constant contact with carbon fiber, all the bonding agents and fuel fitting use. Long term effect? Static from your fitting? Hanger rash? This decision will make or break your sales!
Jesus Christ is the only hope in this world no other gods will lead you to heaven There is no security or hope with out Jesus Christ in this world come and repent of all sins today Today is the day of salvation come to the loving savior Today repent and do not go to hell Come to Jesus Christ today Jesus Christ is only way to heaven Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void Heaven and hell is real cone to the loving savior today Today is the day of salvation tomorrow might be to late come to the loving savior today Holy Spirit Can give you peace guidance and purpose and the Lord will John 3:16-21 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. Mark 1.15 15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel. 2 Peter 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. Hebrews 11:6 6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him. Jesus
Is it possible to make these structures too stiff? I've always been curious about this. In cars, at least, the goal is to make the crash structures purposely less stiff and stable and therefore easier to break away from the main safety cell, but planes are different - I don't think there's a single part of a plane that would purposely be made purposely less stiff than the others. If anything, I'd assume that you'd want places like the wing-fuselage attachment areas to be EXTRA stiff (assuming weight isn't a factor). Is weight really the biggest challenge to increasing stiffness?
If a structure is too stiff it will crack. Some flex is needed to make the structure resilient. If you watch a 747 take off the wings flex upward at the tips several feet as they take the load.
@@davidr8309 I understand that. I also understand that a significant part OF that flex is a byproduct of the sheer weight of the wings themselves in addition to the compliance that's built into such a large structure simply because of mechanical tolerances. Resiliency, flexibility, and stiffness are not mutually exclusive in my opinion - you don't need isomorphic properties in all places all the time. My question is whether the stiffer properties of carbon fiber can be used to create structures SO stiff that they actually become a hindrance. Carbon fiber doesn't crack like aluminum will, and you can overbuild it to the point where it's so strong that the stiffness is just a happy byproduct.
You guys should look into making turbo-aero turbine engines an option. From what I can tell you two will be coming out with a finished product around the same time. I think they are planning to have 100-350 hp turbine engines. I think they will weigh less than 300lbs. Would be a nice option to have on the table at least.
Turbines are certainly the answer for appropriate applications but they really don't work very well for small aircraft. This is mainly because the fuel burn is so high. Turbines are most efficient up high and climbing high takes time and fuel. A small plane simply can't carry enough fuel.
I didn't check all of the other videos, but will the fuel be directly in touch with the carbon fiber, or do you have a coating on the inside of the wing? If you don't, I'm asking myself if the constant contact between fuel and carbon fiber won't impregnate the polymer part and endup creating premature degradation... that can be a serious problem over time...
my god you guys have a lot of patience, your taking forever to develop this but I know your getting it done right the first time, it may take longer that way in the beginning but in the long run it will take less time overall with less failures and rework, Im a project engineer i know better, but you also dont want to hold your cards to your chest for too long, sometimes you gotta put the cards on the table, but how can you survive by taking so long? you must have no overhead or bottomless pockets..LOL usually on average it takes 5 years to get a project to flight.
Beautiful, elegant design. Love your vids explaining your design and engineering choices. Judging based on some superficial experience with composite aircraft structures, it certainly looks like your wing is plenty strong. One question: In case of damage, like say a 6 inch dent or gouge in leading edge, how repairable will this wing be? I can think of one composite plane where all the loads in the outer 75% of the wing are carried almost entirely by the skins. It’s a strong wing, but pretty much unrepairable if damaged.
Do you know Jesus Christ can set you free from sins and save you from hell today Jesus Christ is the only hope in this world no other gods will lead you to heaven There is no security or hope with out Jesus Christ in this world come and repent of all sins today Today is the day of salvation come to the loving savior Today repent and do not go to hell Come to Jesus Christ today Jesus Christ is only way to heaven Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void Heaven and hell is real cone to the loving savior today Today is the day of salvation tomorrow might be to late come to the loving savior today Romans 6.23 For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. John 3:16-21 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. Mark 1.15 15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel. 2 Peter 3:9 The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. Hebrews 11:6 6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him. Jesus
Great video on load testing! Has there been any testing for electrostatic inside the wing fuel cell and / or various max operating temperatures to prove the fuel doesn't cause desalination in the skin? Usually these concerns are only at the cryogenic temperatures but 40k feet average temperature range is -60 C⁰ though fairly far from the -110 to -120 range or lower it would be interesting if you've tested at least a sample with this in mind.
Coming from a seat design engineer at a major aircraft company - well done. You guys clearly did your research on crash testing. The only thing on that 6-point is that customers (and more importantly the customer's wife) is not going to like having to put that on and wearing it the whole flight (especially for a longer endurance airplane like yours). There's a reason most modern manufacturers are going with a 3-point and inertia reel system. I'm sure you've thought through the comfort implications but considering your seat positioning it does seem necessary (although I'm not familiar with experimental aircraft seat cert requirements).
Mechanical engineering student checking in with a question - is fatigue testing something you need to be concerned about given you are using composites? With multiple flights I imagine the wings/tanks will experience cycles of over and under pressure which could potentially lead to problems later down the road? Or are the pressures differences being experienced small enough that that kind of testing isn't necessary? Keep up the awesome work!
Can not wait to buy one. I have a safety design that I think would be beneficial in providing more safety for the pilot as well. I’d love the opportunity to talk sometime!
So great to watch an aircraft being developed by engineers that understand aircraft. I couldn’t stop watching the train wreck known as the Raptor project. Won’t forget how upset the builder Paul was that the test pilots didn’t like that with the stick full left the ailerons could be pushed full right. So Paul stiffened the aileron system up a bit an fired the test pilots. So happy that he didn’t kill himself when he crashed.
Since I know little about the aviation world but have been following the DA journey since day one, come flight test time is a test pilot with a special skill set required ?
These young men are astonishingly skilled.
And it's nice that they're growing the team!
And diligent too. I've seen lots of skilled but careless young engineers, but these guys are so clear and thoughtful in their design methodology.
Agreed.
They are doing everything "right" on engineering work.
Raised in a family where the parents don’t have rainbow hair. Guaranteed 👌
@@rosdar76is that supposed to be funny? 🙄
Nice to hear from you guys again! Closer and closer to seeing that thing FLY!
Do you know Jesus Christ can set you free from sins and save you from hell today
Jesus Christ is the only hope in this world no other gods will lead you to heaven
There is no security or hope with out Jesus Christ in this world come and repent of all sins today
Today is the day of salvation come to the loving savior Today repent and do not go to hell
Come to Jesus Christ today
Jesus Christ is only way to heaven
Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void
Heaven and hell is real cone to the loving savior today
Today is the day of salvation tomorrow might be to late come to the loving savior today
Romans 6.23
For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
John 3:16-21
16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
Mark 1.15
15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
2 Peter 3:9
The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Hebrews 11:6
6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
Jesus
Is there any long term chemical testing on carbon fiber and your resins to see if long term exposure to Kerosene will weaken you wing in any way, or dissolve things into the fuel?
#1 Kerosene is utterly benign to cured laminating epoxies and #2, they aren't burning Kerosene... So you might want to ask about Gasoline. #3, Gasoline is utterly benign to cured laminating epoxies commonly available. Specifically, it is not the gasoline which hurts chemically but rather the additives. I am sure somewhere there is an exception for long term gasoline storage, but I have never heard of one.
The engine they're using has an autogas STC, but they have stated they won't be supporting that because the resin isn't compatible with the ethanol content present in most available gasoline in USA. You can get certified ethanol-free gas, aimed at the marine market I believe. I wonder if that application could be a good option.
Uh... well that is stupid as Methanol/Ethanol or Iso propyl alcohol are benign to epoxies when the epoxy is cured. IF EITHER is present DURING the curing process then and ONLY then will strength be severely effected based on how much of either alcohol type is present to "thin" the mixture down. True if using any Ketone as well as a thinner agent.Often people use alcohol's in epoxy when pouring or spraying as it breaks surface tension properties creating a smooth finish. If too much is present, the epoxy in question will not fully cure and strength etc properties are lost. @@g.tucker8682
To prevent problems with ethanol, coatings are required. Novalac FR530 for example.
Baby forumula is a coating in your world eh?.. Technically true... @@kraftwurx_Aviation
This reminds me of the wet wing design of the BD-4. How do you handle with sucking air during maneuvers when you unport the fuel pickups? This required either a header tank or droop pickups to prevent the issue in the BD-4.
Great question! The short answer is the fuel system utilizes a central sump (header) to keep the fuel pickups from unporting. We discuss the fuel system architecture in detail in this video: ruclips.net/video/kVOEJPPR60U/видео.html
@@DarkAeroInc Thanks. I'd really love to see this matched to the Viking 195t. Good to see a header tank, which will make this match up doable.
@@DarkAeroInc aircraft looks very beautiful with the paint job but have you thought about covering the interior of the aircraft with paint as uv might go through the canopy and affect the resin. btw I really appreciate the knowledege you share Thank you.
Wwould appreciate if made in an option on your website to see the specs in Metrics :) (Or better way, a hybrid that aviation actually uses.. Nm, Kg and Meters... :) ) Looks like a beutiful litle airplane
I’m happy yet surprised that there are still opportunities in this country to make things.
Awesome development work, thank you. It would be great to understand how versioning, release management and bills of materials (BOMs) work in your life-safety development and manufacturing environment. Particularly:
* Versioning: assessment of each version's backwards-compatibility/SEMVER.
* Internal Release Management: internal/engineering with internal versioned product codes.
* How do you structure and maintain the multi-level BOM structures needed for managing the "assemblies of assemblies" of engineered products? It is critically important to isolate the production/factory and parts-purchasing customers from having to understand versioning.
* External release (release for Sale): how are the internal versioned product codes linked to the Sales product codes that customers see?
* Some discussion of the importance of 'immutability' for both the source files (source, CAD etc used by developers) and the object files (binaries, CNC files used by the factory and out-work) are achieved would be great too.
Great comment. I think the one question I would add to your list that would be cool to know is how many bananas long the plane is from prop to tail? Maybe show a banana for scale.
Im an engineer and started a design of ultralight aircraft of 100% carbon fiber construction, several companies in Europe are doing this but I cant find anyone in the states doing this, compare Europe to USA in aviation design they (Europe) are way ahead of us. I based my design off of Burt Rutan builds, but Im using carbon fiber ribs, and aluminum I-beam front spar and rear spar is carbon fiber, with CNC hot wire foam core in between each rib and carbon fiber skins, and its made weight to qualify for UL part 103, so I passed the first challenge of making weight in the wing section, now working on fuselage and tail section, all on solidworks and OPEN VSP software
Do you have any tips to build a ultralight
Could wider crabon fibre tubing with mix of Omni and Uni weave work. Maybe integrated into nose ribs.. ?? just a thought :)
Very methodical. It will be great to see it fly!
So was the Bugatti.
Why does the hump on the wingtip move with the ailerons? Won't it provide lots of separation when the ailerons are not at the neutral position?
Good question! The "hump" is there to balance the aileron about its hinge line which helps prevent control surface flutter. This extra feature does increase drag when the aileron is deflected, but most of the time in flight the ailerons are at neutral deflection. Thanks for checking out the video!
prevents flutter. control surfaces need a counter weight there. if control surfaces get bigger it also helps with the power required to pull those control surfaces into position. only not needed on bigger aircraft who force control surfaces into position with hydraulics.
I’d love to hear more about the interaction of gasoline with the epoxy/composites, particularly over time? Some manufacturers have had LOTS of issues with built in tanks in the marine industry.
Great work though, beautiful plane!!
Especially if an internal pinhole allows fuel to move into the honeycomb spaces when new and over time with degradation due to flex and heat. That is a huge internal surface area and linear distance of joints with a requirement for a perfect seal. At some point lots of joints will be slathered with epoxy and a giant skin will be pressed into place over very many longitudinal members. Can a perfect long-lasting seal be expected?
@@tomscott1159 How are the internals examined? This design looks like a permanently sealed one.
The old-fashioned way would be some sort of "tap" test. Many years ago I owned a Grumman TR2. The bonded joints were "tested" using a nickel on edge and an experienced set of ears. Perhaps someone could devise an ultrasound method to verify that the honeycomb has remained dry.
@@onethousandtwonortheast8848
I was hoping to see the plane moving around on the taxiway... guess we'll just have to keep watching for further updates. :)
Me too! That's what I refer to as ground testing. Apparently, definitions can vary.
I would assume you guys may have covered this before, but is there baffling in the wing to help slow/stop fuel slosh?
Yes! All the internal ribs and shear webs in the wings serve double duty as both structure and fuel tank baffling.
Sweet, I thought I saw them, but always better to ask the people who know! Thank you guys for doing such an instructive job, showing this whole process! @@DarkAeroInc
Did you watch this video?
Yes, but some of the channels were lit in such a way that I could not tell if they were baffles or compartments or what.
Also, DarkAero already nicely answered my question, so thanks for being needlessly aggressive.@@jayphilipwilliams
Are your carbon fiber and resins sensitive to any alcohol in your fuel? This is a problem with the wet tanks in the Stemme Motor Glider.
I hear there's now a market for a commercial airplane manufacturer in the U.S. that focuses on quality & safety. You guys should do a 200 person passenger jet next.
The mistakes at BO can be blamed on management, sure. But they were made by very small groups of individuals. I doubt more than two people were involved in the missing door bolts. One to forget them, and another to pencil whip the checklist documents. Two, possibly three lazy and foolish people caused that.
And probably less than ten were involved in the MCAS implementation. The latter system was a hush-hush deal to satisfy certain draconian FAA type certificate regulations. Where the pitch-response and pitch up due to thrust had to meet certain criteria based on the original 737 type certificate tests, else suffer the laborious, multi-year, two dozen billion dollar punishment that is known as new type certification. And also re-training all crew for the new type rating, because of those handling differences. The MCAS system in its entirety could not be widely disclosed inside of Boeing, nor to the FAA, or to any pilots, when it was implemented by a select few individuals to satisfy those FAA handling requirements by an "other than permitted" manner. The reason it failed so catastrophically, is because it was directly tied to only 1 angle of attack vane-type sensor. But a system that can override the pilot and radically change pitch attitude based on AoA sensor data MUST be tied into no less than THREE sensors for redundancy. One, or Two is insufficient, because it wont know which to believe. It has to have three. This is not an area of expertise for computer programmers, who always and invariably expect everything to function flawlessly, and rarely consider failure modes. Since this was a secret project to remedy a potential issue with the FAA due to a change in handling, it was almost certainly kept secret and the appropriate departments were kept unaware and unable to double check this egregious error made by other departments who implemented this half baked idea. Boeing is to blame for this mistake.
But the blame for Boing implementing MCAS on the 737MAX in the first place is actually the fault of the FAA.
Romans 6:23
For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Come to Jesus Christ today
Jesus Christ is only way to heaven
Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void
Heaven and hell is real cone to the loving savior today
Today is the day of salvation tomorrow might be to late come to the loving savior today
John 3:16-21
16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
Mark 1.15
15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
2 Peter 3:9
The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Hebrews 11:6
6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
Jesus
@EllipsisAircraft Actually Boeing and MD have had many design faults that were ignored and resulted in lost lives over the decades. What has happened in the last couple of years is nothing new. Watch some air crash videos and you will see a history of wrong parts and design being ignored for profit.
Honestly I didn't know that carbon fibre was a suitable material for a fuel tank. I would be worried that the fuel would degrade the resin.
Amazing!!! Greetings from South Africa~!!!
Sorry, but I dig everything, but 100 octane is aggressive, maybe i missed something, maybe missed a Bladder discussion! I’ve been around race fuels , aviation fuel!,
Acetone octane around 114(?)/zylene 116, toluene ?116/17, all these are aggressive on destroying epoxies etc! Those are materials used to bump octanes! (Safe your money at oreilys. If you dumping that in a composite structure expecting it to last!?
Surely, I just let my patience miss something, surely and y’all not doing that?
Speaking of load testing. Since you guys have a wet wing, does the wing get load tested again with fuel to make sure it doesn't leak after an extreme load with fuel inside?
Wait a second? You're going to be having fuel, in the wing? Not in tanks? Are the composites safe for that?
Radio silence from you guys for a long time now. Are there problems with the plane, problems with the team, or just busy with last minute details?
Rapid, continuous rolls could also induce similar/greater loads from fuel sloshing under centrifugal forces.
It's hard to tell in the video, but are you using a "Formula-style" harness? That under-the-leg anti-sub belt routing is only valid with a belt system designed for it (Formula or Schroth Hybrid), and should not be used with a standard 6-point system. Crow does make a Formula restraint.
I'm not sure what the reasoning is for the different linkage, but would tend to trust the engineers that developed them given the amount of research and testing that goes into these restraints.
Very exciting to see the progress!
I'm going with Crow 5-point for my RV-14 project. I have Hooker 5-point in my Decathlon. Hooker is of the highest quality and I'm happy with my harnesses, but they're a bit heavy for cross-country comfort (IMHO). Press on!
Work of art that thing
Just placed an order for 2! Incredible project
Best of luck in finishing the kits (if they start making them) 👍🎉
I know it's probably un-necessary for aviation, but have you considered a headrest for the seat? Seeing necks whip back on crash test footage without them always makes me cringe. (Granted if you ever crashed the DA1 you're probably going to need more than a headrest lol)
Eagerly awaiting the first flight
wet wing sounds like a big problem after some time of exploitation.
Can’t wait to see it fly!
when are you going to fly it? its been forever since you started it.
What prevents fuel being sloshed toward the wing tip in a prolonged slip?
Wait, the fuel tank extends to the tip?
Fuel full length of wing. A fully developed spin will need some rudder. Remains to be tested, I guess. Best wishes!
Hey friends! I noticed your testing method for the anticipated hydrostatic pressure on the wing/tank. Do you plan on a full-scale loaded test on this wing at some point in the future? I am talking about a complete wing on a test stand held at an angle and torture tested with a fuel analog in place. Admittedly this is expensive and time consuming, but compared to the damage to your reputation later on it could be a good investment. What I am seeing is that you are not actually trying to find a failure mode and that is a concern.
Been watching these videos for years and I can't even afford a cheap airplane lol.
We are working on that. $12-15k😮 (Assuming a plans built, alternative engine, single seat aircraft, 110ktas).
For all others, 2 seats, fast. Cant beat the DA. It's going to cruise close to 250ktas.
It all looks pretty cool.. will you put some of the matrix samples from the composite in fuel, just as extra observation on long term wet wing effects?
Man im college for software engineering but I almost went mechanical. If you ever open test dummy applications ill be the first one to sign up
Really looking forward to the maiden flight. Doing an incredible job. I really like this airframe. When done I would like a 3 view so I can build a scale Radio Control plane.
Looking great!! Greatings from Sweden
Great video as always, can't wait for the next one.
I guess you’d have to try a little harder in flight to keep equal fuel level equal in each wing?
Excellent work men! Let's do 300kts!
That ain't happening 😂
Math says, given a 220hp turbo in the low FL's. Yes, it probably could.😮
G,day fellas from Sydney Australia. Fantastic progress of your plane. I should have linked the seatbelt harness design to reduce impact trauma on the human body, in other words: safety, instead of sales and marketing.
🌏🇦🇺
I thought (and was taught) the belt was there to keep you in your seat in case of turbulence but preventing injuries in case of a crash and since you *are* the crumple zone...
Do you have concrete evidence 6 point harnesses save lives on experimental aircrafts?
How many experimental aircraft offer a full carbon fiber tub? Compare this closer to a Formula-Ford. Reclined seats require the extra anti-submarine strap of a 6pt harness, for redundancy, and ability to locate pressure points on both sides of... centerline.
@@EllipsisAircraft Many ultralights do.
But the point of carbon fibre is not to strengthen the cell but to reduce its weight.
I notice that your clearance between the aileron counterweight and wing seems tight. Have you considered that moisture could propogate into that space and freeze? Locking up the controls. Just a consideration.
Have you considered using a toroidal propeller?
Jesus Christ is the only hope in this world no other gods will lead you to heaven
There is no security or hope with out Jesus Christ in this world come and repent of all sins today
Today is the day of salvation come to the loving savior Today repent and do not go to hell
Come to Jesus Christ today
Jesus Christ is only way to heaven
Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void
Heaven and hell is real cone to the loving savior today
Today is the day of salvation tomorrow might be to late come to the loving savior today
Holy Spirit Can give you peace guidance and purpose and the Lord will
John 3:16-21
16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
Mark 1.15
15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
2 Peter 3:9
The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Hebrews 11:6
6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
Jesus
Glad to see your progress... It's been a while since I've seen a post... I've followed you nearly from the beginning, and your doggedness and discipline is exemplary.
Come on, send it to Oshkosh!:-)
Great video guys. Thanks
Congratulations! In addition to making an outstanding plane you are also growing a successful business. Brilliant!
Three views!
209 videos to get to ground test,we’ll done ❤
You should consider a mans testies also. Multipoint harness isnt so bad if you weigh 40kg, but if you weigh more, ruptured testies are not uncommon. People may laugh, but many men would prefer a ruptured spleen to a ruptured testicle.
People designing and building their own airplane from scratch?! Why have I never seen this channel before? RUclips, do better.
Another weight saving possibility is making an engine out of carbon fiber 😅 rotor engine (like in RX-8) to be exact 😎
Very cool project 👍
Hi I am very interested in your project DarkAero I just love how affordable it is and the range of the aircraft would you say this is a good beginner friendly aircraft I just can’t wait for the plane to be ready for its first journey through the skies and into everybody harts finally. Will the plane ever get a
rocket propelled parachute system. Or BRS Aerospace: Whole Aircraft
Rescovery Parachute Systems or does it already have one
Hoping for a larger content staff and more content on all the projects, IF you’re making money off content and it’s beneficial to the income stream supporting the projects velocity towards finish.
Strong work
Incredibly well thought out program. A great way to design an aircraft. I think they call it systems integration.
I call it the Right Way to build an aircraft. Good job!
Excellent work guys , your open approach is very refreshing.
Riley and Brothers May the Airplane Gods Watch Over You and Saint Michael be at your Side when you Do the Air Testing. I will always want to See the Mom and Pop shops show it still alive in America.
Did you consider using graphene enhanced carbon fiber? I read it is much lighter/stronger than regular carbon fiber.
What is that a new way of Flaps design I have seen it in Aero 2024 video
Can you guys design a way to carry skis and snowboards? Like that’s my biggest thing with small planes. I not only want one that does the things your plane will do, I want it to carry 2 snowboards.
Testing for hydrostatic pressure is interesting but how much increase in pressure would you anticipate?
What a beautiful job! How has your project been financed?
are you going to install a whole aircraft parachute?
Ok it's white now, how's the paint holding up? U wax it yet?
Designing a high-performance aircraft is no mean feat...
Do y’all need any A&P’s?
It needs headrest for the whiplash injuries...
Do you guys hire cs majors?
Who are obsessed with aviation that is.
The fuel tank in the wing with NO bladder, and trying to get the wing to seal correctly
*WILL BE A NIGHTMARE* for builders.
If a builder does not build the wing perfectly the way YOU have, it will not hold fuel.
Your making/manufacturing an awesome aircraft, but your NOT thinking of your future builders.
Fuel in constant contact with carbon fiber, all the bonding agents and fuel fitting use.
Long term effect? Static from your fitting? Hanger rash?
This decision will make or break your sales!
Jesus Christ is the only hope in this world no other gods will lead you to heaven
There is no security or hope with out Jesus Christ in this world come and repent of all sins today
Today is the day of salvation come to the loving savior Today repent and do not go to hell
Come to Jesus Christ today
Jesus Christ is only way to heaven
Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void
Heaven and hell is real cone to the loving savior today
Today is the day of salvation tomorrow might be to late come to the loving savior today
Holy Spirit Can give you peace guidance and purpose and the Lord will
John 3:16-21
16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
Mark 1.15
15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
2 Peter 3:9
The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Hebrews 11:6
6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
Jesus
Is it possible to make these structures too stiff? I've always been curious about this. In cars, at least, the goal is to make the crash structures purposely less stiff and stable and therefore easier to break away from the main safety cell, but planes are different - I don't think there's a single part of a plane that would purposely be made purposely less stiff than the others. If anything, I'd assume that you'd want places like the wing-fuselage attachment areas to be EXTRA stiff (assuming weight isn't a factor). Is weight really the biggest challenge to increasing stiffness?
If a structure is too stiff it will crack. Some flex is needed to make the structure resilient. If you watch a 747 take off the wings flex upward at the tips several feet as they take the load.
@@davidr8309 I understand that. I also understand that a significant part OF that flex is a byproduct of the sheer weight of the wings themselves in addition to the compliance that's built into such a large structure simply because of mechanical tolerances. Resiliency, flexibility, and stiffness are not mutually exclusive in my opinion - you don't need isomorphic properties in all places all the time. My question is whether the stiffer properties of carbon fiber can be used to create structures SO stiff that they actually become a hindrance. Carbon fiber doesn't crack like aluminum will, and you can overbuild it to the point where it's so strong that the stiffness is just a happy byproduct.
So cool! Any update on parachute option? Thanks!
with all the pressure test, dont hear you talk of temprature variation and how the material will perform in vering temparature
I guess the 6 point harness means someone can't be wearing a skirt and have their legs covered for modesty and sun protection?
I wish I had my degree already I would love to work with these ladies and gentlemen
Hey guys 👋 How is it going with the plane ? Been awfully quiet lately 😊
You guys should look into making turbo-aero turbine engines an option. From what I can tell you two will be coming out with a finished product around the same time. I think they are planning to have 100-350 hp turbine engines. I think they will weigh less than 300lbs. Would be a nice option to have on the table at least.
Turbines are certainly the answer for appropriate applications but they really don't work very well for small aircraft. This is mainly because the fuel burn is so high. Turbines are most efficient up high and climbing high takes time and fuel. A small plane simply can't carry enough fuel.
I didn't check all of the other videos, but will the fuel be directly in touch with the carbon fiber, or do you have a coating on the inside of the wing? If you don't, I'm asking myself if the constant contact between fuel and carbon fiber won't impregnate the polymer part and endup creating premature degradation... that can be a serious problem over time...
I'd think they could get a bladder made
If the goal is maximizing efficiency, range and speed, wouldn't a tandem seat configuration be better?
No one likes tandem seating
my god you guys have a lot of patience, your taking forever to develop this but I know your getting it done right the first time, it may take longer that way in the beginning but in the long run it will take less time overall with less failures and rework, Im a project engineer i know better, but you also dont want to hold your cards to your chest for too long, sometimes you gotta put the cards on the table, but how can you survive by taking so long? you must have no overhead or bottomless pockets..LOL usually on average it takes 5 years to get a project to flight.
Wish I could own one of your aiplane.
Regarding the cockpit, what is the maximum size of pilots in it? Very interested in one as it would me and my wife perfectly, however, I am 6"7'....
Beautiful, elegant design. Love your vids explaining your design and engineering choices. Judging based on some superficial experience with composite aircraft structures, it certainly looks like your wing is plenty strong. One question: In case of damage, like say a 6 inch dent or gouge in leading edge, how repairable will this wing be? I can think of one composite plane where all the loads in the outer 75% of the wing are carried almost entirely by the skins. It’s a strong wing, but pretty much unrepairable if damaged.
Been playing MS FS '24 again and would love to see the Dark Aero 1 as a plane option to fly in it!
can't wait to see the bird flying!
The Wright Bros. designed and flew the Wright Flyer wihtin 4 years.
Do you know Jesus Christ can set you free from sins and save you from hell today
Jesus Christ is the only hope in this world no other gods will lead you to heaven
There is no security or hope with out Jesus Christ in this world come and repent of all sins today
Today is the day of salvation come to the loving savior Today repent and do not go to hell
Come to Jesus Christ today
Jesus Christ is only way to heaven
Repent and follow him today seek his heart Jesus Christ can fill the emptiness he can fill the void
Heaven and hell is real cone to the loving savior today
Today is the day of salvation tomorrow might be to late come to the loving savior today
Romans 6.23
For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
John 3:16-21
16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 17 For God sent not his Son into the world to condemn the world; but that the world through him might be saved. 18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 19 And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil. 20 For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved. 21 But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God.
Mark 1.15
15 And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
2 Peter 3:9
The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
Hebrews 11:6
6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.
Jesus
Great video on load testing!
Has there been any testing for electrostatic inside the wing fuel cell and / or various max operating temperatures to prove the fuel doesn't cause desalination in the skin?
Usually these concerns are only at the cryogenic temperatures but 40k feet average temperature range is -60 C⁰ though fairly far from the -110 to -120 range or lower it would be interesting if you've tested at least a sample with this in mind.
Coming from a seat design engineer at a major aircraft company - well done. You guys clearly did your research on crash testing. The only thing on that 6-point is that customers (and more importantly the customer's wife) is not going to like having to put that on and wearing it the whole flight (especially for a longer endurance airplane like yours). There's a reason most modern manufacturers are going with a 3-point and inertia reel system. I'm sure you've thought through the comfort implications but considering your seat positioning it does seem necessary (although I'm not familiar with experimental aircraft seat cert requirements).
What’s your guys education background, A&P and engineering?
Mechanical engineering student checking in with a question - is fatigue testing something you need to be concerned about given you are using composites? With multiple flights I imagine the wings/tanks will experience cycles of over and under pressure which could potentially lead to problems later down the road? Or are the pressures differences being experienced small enough that that kind of testing isn't necessary? Keep up the awesome work!
What brand cargo pants is Ryan wearing? Love those zippers on the cargo pockets.
I'm still sad they just painted it white
How many members of company are licensed pilots? I'm guessing more than one haha.
Can not wait to buy one.
I have a safety design that I think would be beneficial in providing more safety for the pilot as well. I’d love the opportunity to talk sometime!
So great to watch an aircraft being developed by engineers that understand aircraft. I couldn’t stop watching the train wreck known as the Raptor project. Won’t forget how upset the builder Paul was that the test pilots didn’t like that with the stick full left the ailerons could be pushed full right. So Paul stiffened the aileron system up a bit an fired the test pilots. So happy that he didn’t kill himself when he crashed.
Very impressive! Do you have any intention of a head and neck, helmet and Hans device, restraint system?
Nobody is wearing a helmet in this style of airplane.
@@galactictomato1434actually they have mentioned it in a q&a for paying subscribers and they said that there should be enough space for a helmet.
@@Thomipangang interesting
Since I know little about the aviation world but have been following the DA journey since day one, come flight test time is a test pilot with a special skill set required ?
Nice plane, your other videos were good. This one though discussed things I knew in high school. Was this a primer for elementary school or what?
❤