FASTEST RC AIRPLANE IN THE WORLD! Transonic DP -- 545mph!!
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- Опубликовано: 7 сен 2024
- Most folks don't realize that the fastest RC airplane is a glider with no jets or motors. Here Spencer Lisenby sets a new record speed of 545mph with the Transonic DP using a flying technique called Dynamic Soaring.
en.wikipedia.o...
www.dskinetic.com/
If my math is right, this plane is pulling a roughly 36G maneuver.
The theoretical average load is around 60-70G but due to the nature of making imperfect circles with large corrections in turbulent air, the actual max load is probably around 90G. Data logger was not used on this flight but we have measured other flights and have recorded as high as 120G in the air!
Can you explain your math. According to mine it should have approx 600 G. Where am doing wrong?
@@sll914 Holy sh*t !
@@sll914 Whaaaaat? That's incredible! How much does it weigh? What's the wing load like there? What did you madmen make this thing out of? Why doesn't it just explode?
Really terrific work, you're way beyond my imagination with this project.
Show us your math and we'll let you know if it's correct.
Dynamic soaring might be possible between the belts and zones on Jupiter and Saturn, and with the mainly hydrogen-helium atmosphere, the speed of sound would be nearly 3000 mph. 2000 mph gliders, anyone? They would, of course, have to be completely autonomous, but it could be a means of exploring the gas giants without nuclear power, just a ram air turbine powered by the slipstream. Hitting ammonia rain at 900 meter/s might be catastrophic, though.
I'm flattered that you think it's fake or altered. Just confirmation that it's something extraordinary... I recommend googling Dynamic Soaring to educate yourself before making silly false claims. I even put a Wikipedia link in the description above to make it easy to start your research...
So which is it? Is it FAKE like you said, or do you now want to offer your valuable insights (physics degree and all) to help us go even faster?
In either case, I hope you will do a little research first and get a better understanding of how it works and the engineering that has already been applied. Otherwise, you run the risk of be ignored because you come across as both ignorant and arrogant. Over the last 20years, dynamic soaring has drawn the interest and input from alot of extremely smart people such as MIT professors, engineers, and passionate/enthusiastic RC hobbyists. When I first got involved in DS, the top speed was only 232mph. Alot of work has been done by alot of talented people to achieve the speeds that are now possible. Its all out there on the web, just do some googling.
To answer your question, proof of the speed of the plane comes from a calibrated radar gun as has been the standard for the last 15-20years... If you want to see the speed on the gun for yourself, there's a photo in the last post of this thread on RCGroups:
www.rcgroups.com/forums/showthread.php?3090816-New-World-Record-Spencer-Lisenby-Kinetic-Transonic-DP-545MPH
Anyway, I hope you didn't pay too much for that Physics degree... ;o)
What do you think its made of, Wood and tissue paper? These planes see up to 100g at times and weight over 10kg. I reckon they are probably made of some pretty advanced composites already maybe.
Mate YOU ARE DREAMING. There would be little to no fibreglass in a D130, which is irrelevant anyway as we are talking about a Kinetic here. Spencer will know for sure as he actually invented the Kinetic and builds them but I'm pretty sure it uses a lot of HM or UHM carbon in the structure. In any case, myself, as another builder of fast DS models, can tell you that while fibreglass can work to a point, for really fast speeds the model needs to be super strong for the weight and carbon is really all that can cut it.
Have a read of this thread on RC groups. www.rcgroups.com/forums/showthread.php?778363-Carbon-Testing-Part-2%21-Hollow-Molded-Monster%21 This is how fast DS planes are made, though it is getting pretty old now, Spencer has probably advanced a lot of the processes and materials but you will get the idea.
Oh, and Kevlar is not all it's cracked up to be for stiffness. It is not that much stiffer than fibreglass really. Its main advantage is that is very hard to tear (we use it for "live" hinges and areas where we need radio reception to pass through like in the noses of our fuselages mainly)
Don't engineers in defence just sign leave apps?
Hi Isaac, I may have missed some of the relevant discussion but my 2 bob's worth anyway - Like Josh I'm an Aussie too and have been totally intrigued and captivated by DS for nearly 10 years now. Yes it's true that there's no international body that organizes DS ... all the protagonists are individuals and we rely on the honesty of our colleagues in posting speeds which are logged on a database: rcspeeds.com/. But it's definitely very real, the speeds you're seeing are quite accurate, and the whole DS phenomenon is really is amazing, and worth looking into. Not just the huge high speed stuff as posted in this vid, but even the lower speed stuff where you can keep flying at >100mph speeds when winds are quite moderate on hills with the right shape and wind conditions. DS is very real, and really amazing and flying DS is very addictive. The guy you're querying, Spencer, is himself an engineer and actually relocated from the east to SoCal just so he could pursue DS intensively! Which he has done, producing the fastest DS airframes in the world and owning the world record himself for most of the last 10 years or more. DS has been the subject of some academic research - mostly for the way Albatrosses use DS (in a sine wave pattern rather than circles) to stay aloft along big ocean swells. In 2012 we were honoured to have some scientists from Woods Hole, researching DS, visit Weldon to observe the planes and at they were fortunate enough to strike one of the biggest days at that time where speeds of around 450mph were reached. I know that one of Spencer's Kinetic 100's is displayed in the German Museum of Flight (back in 2011) (are there any similar displays in the US yet??). Spencer has addressed audiences about DS - eg this presentation in Germany: ruclips.net/video/nv7-YM4wno8/видео.html.
545mph....simply wow. I haven't been flying ds in many years, but I am one of the originals here in California where I was witness to the OG's on Parker Mountain. We were flying 200mph or so, and it was Joe Wurts and Bob Bowman that believed 400mph was possible. Of course our planes were nowhere near strong enough and it just got better and better from there. Once in a while I check in to see where the new record is and 545mph is amazing. Congrats on the plane, and record......very well done! Hope those guys Joe and Bob are still doing well.
Hi everybody. I fly my control line plane at 120mph. These planes are almost unbelievable. The speeds and stress that are involved make my 120mph seem like a casual stroll.Good thoughts to everyone out there and happy flying.Pete and Dee from Sacramento California USA.
Ну да 80-100 это ещё каждый сможет
120 уже тяжело
This is one of the most amazing things I've ever seen, beyond cool!
Has anyone watch 1000 ways to die where a guy lost his glider and it went into his back andbtge nose through his body now imagine that aiming at your head decapitation literally sooo many ways to kill yourself a missile like that is one of them
Imagine, this is making closed course type runs, not one way speed runs. The really astonishing way to look at it is it's turning in speeds that are almost 100 mph faster than the Unlimited Gold Class Reno race planes.
And I guarantee you that there's no way any of those planes or pilots would survive 36g's!
So cool!! Flying a r/c jet at 200 is insane enough I cant imagine my eyes trying to focus on that!
quite possibly the fastest hands to have ever picked up a radio, congrats on another record, man. I used to DS in norcal years ago when the speed record was 202mph (Craig T). How things have changed, holy cow.
Simply amazing....AMAZING! Congrats Spencer and team!
BTW, for anyone who likes geeking out with math...
If you add the local wind, which was gusting to 80mph, and calculate actual airspeed, you get this:
545 mph ground speed + 80 mph wind gust = 625 mph!
At 5,000ft MSL (the rough altitude of the pass where he was flying), the speed of sound is approx. 750mph. 625/750 = 0.83
Mach 0.83 !!!
Yeah; you're definitely dealing with transonic drag rise there, buddy! :D
The 545 was measured when he was flying with the wind. But it was accelerating. It was not moving with the air mass. So the velocity addition may not be valid. And the gust did not necessarily occur when the radar caught the 545. When flying into the wind, the air speed would be the ground speed plus the wind speed. It would be interesting to see whether a radar gun on the opposite peak could catch the speed. Given the strong wind shear, measuring wind speed would be very difficult.
I think the distinction between airspeed and groundspeed is lost on most modelers. Visit a typical flying field and you’ll hear people expounding on a model’s behavior upwind vs downwind and claiming to make adjustments accordingly. Ironically, when they actually do, they stall.
In DS, a glider is not operating in a single airmass so it’s possible to add inertia with each pass. Nevertheless, it’s AIRspeed is pretty damn high.
In a single steady state airmass , even an indoor rubber model could theoretically do 500mph.
My apologies for jumping to exciting conclusions ... I thought the radar reading was on the "upwind" leg of the circle, but even if it was - and even IF the windspeed WAS 80mph - I can see how the different air masses so close together makes my simple speed-addition "optimistic" at best :P
Still .... FREEKIN' FAST AND FREEKIN' AWESOME!!! :D
@@aeromodeller1 неправильно планер разгоняться где нет склона в пикировании по ветру.
До вершины склона летит почти без ветра в турбуленции от горы.
Who would have ever believed the speed record would be set by an unpowered aircraft? This is extraordinary and amazing. Obviously the planes have to withstand extreme g-loads and I am super impressed that it's even possible to build a wing that can do it. They are talking about loads of up to 100g!!!!! I have built a few RC planes myself for tootling around in the park but this is something else! By the way I'm intrigued by the physics of the speed build-up. I don't understand how it works. And is it possible to break the sound barrier?
Imagine owning a rc plane that goes the speed of an actual plane
glider no less
*faster than
Don’t know how to break this to you. It IS an actual plane. If you disagree, stand in front of it when Spencer has it wound up to 500mph. Imaginary planes don’t hurt.
Imagine setting in a real Single ingen plane at full speed and be overtaken by a rc plane
Yea could imagine getting it upto speed and just glide it around no power needed only enough juice for the servos
Getting closer to the design speed of this glider ;-) I think RC gliders have been the fastest models since the Austrians in the late 1970's built the first composite ships and backpacked them up the Alps. After setting the speed record, they won the world F3B multitask sailplane championship (F3B includes a speed task). By 1981, the Canadians introduced ultra-powerful winches for zoom launches and terrified everybody (one response, F3J, was supposed to be a reversion to more sedate soaring, ha, ha!). Dynamic soaring came later, whose advent, like discus-hand-launched gliders, I associate with California.
Its about ~877 km/h
And its only a glider good job guys
Right on Spencer, congratulates to you and the Kinetic engineers who made this possible. The RC-turbine boys must have saw the light at the end of the tunnel go ....dim! :)
AWESOME!!!! Congratulations Spencer!!!!
Weldon coordinates btw if anyone was wondering are 35.653780,-118.296260. These coordinates are beside the rock wall made for the guy with a radar gun.
One of the most amazing things I've ever seen! Thank you for sharing :-)
I like how you go over 500 mph then land at 2mph. I used to live in SF Bay area. There was a slope in south bay where gliders would fly. A saw a guy slope soaring a glider and was amazed at the speeds he reached. Then he'd pull the nose up and climb 200 feet str8 up in about 1 second. Until you see it, you can't believe it.
How can you follow that plane as the pilot? In the video, I could just barely see it as you did your bottom turn and climb, let alone follow it through the next turn and descent. This was the most fantastic thing I have seen in the modeling kingdom. And I thought the FMS V900 for a prop and that 464 mph fully jet-propelled red rocket with wings were fast.
Its alot easier to keep eyes on it in real life. I really encourage you to try to experience DS in person some time. Its much more exciting when you can see/hear/feel everything...
На видео скорость планера в 2 раза выше из за поля зрения
В реале он медленнее в 2 раза
Congratulations, you have worked hard for it.
I'd like to put in a vote for a fixed camera on a tripod. The orbits are pretty much over the same points over and over. There is only so much bandwidth for the video codec to describe the scene. If the ONLY thing changing is the position of the glider, you have a very real shot at getting some amazing footage that can be seen easily with the sort of bandwidth that YT offers up. If you instead have a handheld camera, then all of that data gets used up describing how the entire scene is changing. This is why shots of water look like garbage unless you have an incredibly high bitrate video - everything keeps moving.
Some day it may be possible to film such a fast flight and give it justice. Wow is that fast.
jedi skills
Damn!!! That must be what?..... Mach 0.7+ !!? Here's a question, could you build a glider that has a swept wing, even lower finesse ratio, raked tailplane, all moving elevator, then really push towards Mach 1?.. Is it theoretically possible to go supersonic?
@Feeds Ravens change a few words and it sounds like my first marriage
@Feeds Ravens Or we shall put a sugar rocket engine to help it to reach Mach 1 ! 😁
@Feeds Ravens Yeah, but those are difficult to buid in an RC glider.Possible, but difficult. It would have to be 100% carbon fiber.
The thing with dynamic soaring is that the faster you go, the more energy you you get (i.e. 2 * the wind gradient per circuit). I'm guessing (without doing detailed maths) that someone could go supersonic with this.
It's been my belief for years that at some point the planes configuration will have to change dramatically to be strong enough and flyable enough at those speeds and with those forces. I imagine a twin boom with elevator mounted between for strength and minimal fin/rudder as it is not needed at those speeds.
Oh the art of dynamic soaring!
It's so incredible that I giggle until my eyes tear up every time I watch it. I've only DSed on the simulator so far. All my locations have explicitly banned all back side flying (I wonder why, hahaha! Can you imagine what would happen to someone if they got hit?).
Congratulations. Absolutely amazing. That's 877 km/h. It's the cruising speed of a Boeing 747. really good piloting skill is needed to cope with this
боинг развалиться на такой скорости у него от силы приборная скорость 550-600 км/ч рекорд у земли сделан тут приборная около 800-820 км/ч
My 61" Chris Foss Middle Phase balsa glider with dihedral probably can't do this, but ill try anyway! Very impressive
Be careful, blowing up an $80 Ripmax from Ebay on the backside our first time out got my brother and I hooked. Countless $1k+ airframes later....
Keep up the work, we'll be breaking Mach 1 soon.. who will be the first rc glider pilot to make a sonic boom?
You guys are 75% there.
what!¿ holy piloting skills! thx for sharing
When you land the glider, is it at all warm/hot from air friction? I guess the composite nature of the materials might make it cool off rather quick in the slow landing speeds. An amazing achievement!!
Theoretically it does heat above ambient but it takes a few minutes to slow down and land so it is cool by the time we pick it up.
wow that is amazing. Very counter intuitive. You'd think it would bleed the energy hard in a constant loop. Is the plane weighted in the nose or as light as possible? what's the wing profile and how was it shaped? I'm guessing it's "razor" thin. Absolutely amazing it's able to retain its energy in the loops. Must be some kind of windmilling effect. It furthers my belief that GA planes can be incomparably much better than they are today. Light and cutting through the air.
Google “dynamic soaring” it will explain what is actually happening.
About safety... hard to tell, but it seems that the plane got relatively close to the cameraman on a few occasions. Such thin wings, moving so fast, against a human body... I am no physicist, but... wouldn't it be like a hot knife slicing warm butter? I also saw the TNG video explaining all this stuff, and, for very understandable reasons, those wing are quite heavy and very rigid... Worrisome, considering that, at such speed, even the best pilot in the world can't be able to compensate if anything wrong happens.
You are wise to be concerned. Years ago, we flew behind plywood walls for safety as we had cervo failure pretty often. We used to hide behind our cars even at speeds of 200 mph.
It would just fly through you and keep on flying
I wonder the distance if you drop that plane from a high Alt balloon, I wonder the distance and speed.
Поздравляю. Вы самый быстрый авиамоделист на планете земля.
Штурману тоже медаль
Почти все квантовые эталонные анализы ограничиваются случаями, когда событие представлено числовым коэффициентом. Это ограничение произвольно и не мотивировано физическими наблюдениями. Мы показываем здесь, что отмена закона является новой ссылкой на статус кантонского диалекта, и указываем на то, что система статуса отсутствия независимости может также потребоваться в состоянии национальной независимости. Это снизило вероятность получения государственной независимой справки по крайней мере от 13 инспекторов, по крайней мере, из которых были назначены для дела №1. Мы предлагаем, чтобы на любую должность требовалось как минимум девять тренеров. Кроме того, в уменьшающемся количестве испытаний мы обнаружили, что 13 участников также были изолированы в случаях, когда все респонденты были в форме второго или третьего класса.
AWESOME SPEED SPENCER!
Why the down votes? This is extraordinary!
I really want to see one of these dive into the ground at max speed.
How much power is this magnificent machine harvesting from the wind to go 550mph while pulling 100g?
Awesome brother and congrats. I really miss being on the hill and burning circles with you guys.
Was that still in 1st gear ?.
Amazing speed, well done 👍
0th
Whoosh. Whoosh. Whoosh.
Amazing. Congrats!
If you can watch the plane 0:10 - 0:58 in 2× speed for 1 second you are the next guinness record holder 😜😅
This is some seriously cool shit!!! Cutting edge literally!!! Super impressive!! 💪🏼💪🏼💪🏼💪🏼
You know, if you used my voice pack, it would read out the max GPS ground speed to you. Crossfire Telemetry should save the max ground speed as TELExx+ I forget which number xx is off the top of my head).
Unfortunately, GPS can't keep up due to the high acceleration.
WTF. That thing travels at mach 0.7. Craziest thing I‘ve seen all week.
Thanks for this! I''m going to go wave my iphone around and claim I saw UFO's.
Man thats really insane! Do You have some sort of barrier set up to keep it from cutting you in half in case you lose control of it?
Nope!
I've seen videos of it losing control and just smashing with a loud bang into the side of a mountain. I suppose if the pilot really feared for their safety they could just pull back all the way on the stick, and either rip the plane to shreds or stall it to a stop
@@dsdy1205 yes but in the case you “lose control” of the plane that thing is going to destroy whatever it hits. I’ve done very dangerous stuff and had more than a fair share of close calls in my day so Im always think of the worst case scenario. I mean even if the battery hits you at 500 mph you’re dead meat lol
So fascinating. Loved the lecture about the design and fabrication challenges. Any guesses on what would happen to it when it break the sound barrier?
Very impressive
isnt terminal velocity around 150 to maybe 200 mph? so how is this going faster than that without a motor. is it roller blading off the air or somethin??
Gotta have some serious DR/Expo on that haha.
5% everything 😂😂😂
Wow! That's 545mph as measured by a radar gun on the ground, right? With the air rushing up the hill, any idea what kind of airspeed it's experiencing at that time? Is is actually transonic? Supersonic? Awesome work.
if the wind was blowing 65mph then peak airspeed after crossing the shear layer may have been ~610mph. I don't remember the temp on that day but if speed of sound was 760mph, then that's mach~0.80 which is definitely considered transonic (m=0.72-1.0)...
The engine sounds so awesome!
No engines... Just gliding and skill
Great work, that was amazing.
I fly RC it's an amazing hobby but flying in the wind is difficult at 30 mph, flying standing up in 70mph wind is near impossible and to top it off try flying a RC plane in it... Now add the fact that the plane is doing 500+ mph. This is not average Joe type shi! It's mind blowing and superhuman! Not but respect for your skills!
i m trying to do payment but its not working . tell me how can i join ? if u have gpay then i can do . let me
How many RC pilots around would be able to control such a beast?
Awesome! Where exactly is this slope? Can you find it on google maps (switched to terrain mode) and tap and hold on the map where you are standing in this video and it should give you the coordinates that we can copy and paste into our google maps for directions. I noticed it's close to the Weldon Slope. Thanks!
Put on some delta wings (maybe with variable geometry tech) and smash that sound barrier. :D
AWESOME! Congrats on RIPPING IT UP! :D
That is amazing with world speed record no engine just wind powered correct 545 mph my friend would like an answer on exactly how you’re doing this
click the link in the description for Wikipedia page or here's a talk I gave a few years ago
ruclips.net/video/nv7-YM4wno8/видео.html
548? Did you break the sound barrier? Start calling out Mach 1?
near, it was subsonic; the made the calculus up there: Mach 0.83
@@AndoniOlea Not sure where that calculus came from but 545 mph at near sea level is Mach 0.73 generously. At around Mach 0.85+ you'll start seeing localized shockwaves as the air velocity changes over the airfoils, and with a glider that means exploded airframe. There's a reason supersonic aircraft have swept wings (and no props).
@@cypress9735 search the user Ben Harber below here, he made a aproximation with calculations.
@@AndoniOlea Ah, 80MPH winds that explains it. Didn't realize there was a hurricane there. Crazy they could stand up straight without holding on to a tree or something.
@@cypress9735 that's actualy because they are in a height of 5.000 feet in the mountains.
Congratulations! outstanding!
amazing pilot skills
Impressive ! Is there an equivalent in full scale glider ?
Not really. At full scale, the structural problems are overwhelming. Also, no manned potential due to extreme high Gs
This is definitely the work of Belkan scientists.
All jokes aside this is actually cool as shit
I remember reading several years back that 'knowledgeable" folks didn't think 500 was likely to be broken by much. Obviously they were wrong, since you guys are apparently hitting just about 10% above it, already Kinda makes you wonder what the limit really is with a very solid wind coming over the top. Did you measure wind velocity above the hill the day you did that? My guess is that structure might be the limiting factor at some point, as I suspect there is a sweet spot in radius, etc for a given hill/wind speed/loop size/etc.
Hard to believe the people that go around hitting thumbs down on every video they can find, found this one so fast!
They are insecure, this shatters thier ego, probably power fliers who feel knocked down that thier motors are less powerful.
Making me seasick but how impressive is that? At first I thought "am I really seeing this?" Second pass my jaw dropped! Wow!
If the wing snapped at exactly the right moment...that would be a bad way to go. This is unlikely, and other forms of RC are far more dangerous in terms of chance of injury. However, this is a nearly trans sonic spear.
How did he control it? It's so fast... I cannot igmine it actually was controlled manually
Speed of sound is about 700mph......still a way to go......but jeez that’s quick.
Well done Spencer, that is amazing. Where the radar gun is taking the reading, is that the fastest ground speed in the circuit?
No the it's a good bit lower than the max groundpeed. The location of the radar gun is more a matter of convenience and safety..
i was wondering how fast an rc goider could go and i wasnt expecting even 50mph, that is absolutely shit balls fast
I know it’s a typo and i make plenty of them but thinking of a shit balls fast goider...🤣🤣🤣🤣🤣
@@ahvavee SHES RIPPIN MOITE FACK ME
without a motor
How the heck did you get a good radar read on every lap?
Practice...
@@isaacweddle1501 Yes.
Why do you make auch false statements on the internet?
If you knew anything about DS or Spencer you would notice that it is indeed possible to reach these speeds using only a glider. Btw, the plane surely doesn't weigh 5 Kilos, rather 20. There have been enough people witnessing flights with similar speeds to thus.
@@isaacweddle1501 Sorry, my mistake. The dynamic 130 weighs 42 Pounds, 19 kg. This Transonic weighs just 8.5kg and has a Wing surface which is a lot smaller as well. No I do not have a physics degree but am an engineering student and a passionate model glider pilot. I have seen a planes go 500+ kph on slopes which are a lot worse than this one in therms of ds speeds.
@@isaacweddle1501 I wasn't asking about radar because I don't know anything about DS and needed someone who's never done it or even seen it first hand to explain it to me. I've DS'd 350+mph myself. I was asking, because I've personally radared Kinetics at 450+mph in the past, and generally they're extremely difficult to pick up because of their very low frontal area, combined with the very short window of opportunity we get to see the plane coming directly at the gun and the low power of the radar guns. It was not uncommon to only get one out of every 5 to 10 laps. In this instance they were getting almost every lap which is unusual. Word is, the newer generation of the radar gun we're all familiar with is simply better than the older ones, and Spencer always has the newest one available.
It is kind of hard when people on a blog don't keep in mind that not all the people that see and comment on a video actually understand what is going on... I mean I'm and RC Enthusiast, Have a few rc planes... but never have seen any one doing soaring..."Honestly beside of the fact that I'm aware that the planes use rising wind, and have no motor, I'm really ignorant of all the details and intrinsic physics involved on the process...Hell I thought that it was a GPS speed reader..
One of the UFOs the news keeps talking about!
Amazing!
You should put an accelerometer to mesure g-force on glider 's structure.
We have but the accelerometer was only good to 120G which we exceeded...
если время прохода круга 2 секунды то перегрузка 61G (611м/с2) если время прохода круга 2.5 секунды то перегрузка 76G (765м/с2)
потрясно
Why is it that almost all dynamic soaring videos are recorded in 1080p 30 fps or lower ? :(
Id love to be able to see this in crisp 4k60 or 1080p240 from a Gopro or similar camera.
At 545 MPH the plane is moving ~266 yards between each frame.
On my Gopro, I can not film in Narrow FOV at 4k/60fps. In any setting other than Narrow, it's nearly impossible to see the plane and I find the fisheye distortion annoying. Send me a Hero7 and I'll be sure to fulfill your request 🙂.
Also, check your math. At 30fps, I get: 545x5280/60/60/30=26.6ft per frame or 8.7yds (instead of 266yds)
Thanks for watching. Best solution is to just come to the hill and experience it in person 🙂
One wonder how long before that wing collapse from fatigue.. I mean it have to flex incredibly under all that load...
It's consumable xD
Imagine birds through history being admired by humans for their ability to fly, then the plane came in, fuck, and now rc planes doing up to 727 kmh, fuck but that's not fair they are using engines. Hold my beer
Unbelievably FAST
How do you avoid control surface buffeting?
Strong and tight MKS servos and linkages with favorable geometry and no slop...
@@sll914 Cool! I thought it was interesting that you didn’t move the whole control surface like they do on supersonic fighters.
It looks like a very hard "wee!"
Ngl this is thing makes a pretty terrifying sound. Ironically it has no engine and thus shouldn’t make one lol.
:-D man once I tried with old heavy batteries and a new motor to build "for me" a fast plane. I though plane is now smaller everything is more build for speed... Yea I sure get 160-180...... Kmh. :-)
I got 120-125 flying a flat curve.
How much movement is there on the control surfaces?
It doesn't take alot of deflection at these speeds only a few mm, but the surfaces are constantly moving as we fight turbulence and make corrections to the flight path.
Must be some serious servos
@@dankoneon
MKS 🙂
545mph ground speed is impressive. Do we have any idea how much Airspeed was achieved ?
The groundspeed is measured on the backside where the windspeed is near zero. So If you figure 70mph winds on the frontside, the airspeed could spike to around 600mph after it crosses the shear layer
Any news on any progress to further the record? Must be nearing the limit now surely?
Hi Adrian, still working on it every chance we get! I think it may be possible to reach a groundspeed around 575mph in the right conditions but yes, for non-swept wings, I think that'll be about it due to the transonic drag rise. Once we get close to that, I hope we'll have the improved swept wing ready to go...
@@sll914 I remember back in the day Joe wurtz saying theoretical max is up around there somewhere? Will we hear a sonic boom one day?
How do you measure the speed?
We use the Stalker Pro II Radar Gun. Good to 890mph!
www.stalkerradar.com/sportsradar/ProII.html
congrats!
supercool! but why didnt the radar gun get pictured for the film? It looks superfast, i just never believe word of mouth.
www.rcgroups.com/forums/showthread.php?3090816-New-World-Record-Spencer-Lisenby-Kinetic-Transonic-DP-545MPH
See full size photo in post #16
insanity, i wonder if it could go supersonic
Excellent piloting skills! Its possible to go even faster if there is more wind, correct?
Yes more wind=more speed to a point. We are fighting a transonic drag rise problem where a shockwave forms on the wing and causes alot more drag. Next version will have swept wings to delay this problem.
when/if you break the sound barrier will the plane disintegrate?
No, but it will go Boom, Boom!
XP-86
Maybe an oblique wing, rather than swept, for structural reasons, and you are flying in a circle.
www.nasa.gov/centers/dryden/history/pastprojects/AD1/index.html
WTH? It's a glider? And it's faster than a swept wing jet-propelled R/C? Wow! Unbelievable? How do they get up to those speeds on air currents? Power dive? Mind blown.
ruclips.net/video/nv7-YM4wno8/видео.html
What was the wind speed? Incredible job!
I measured 65mph just before launch.
super sonic