Just brilliant little film. The whole think is mindblowing and I will for sure look at the lecture video tonight. Being a full-scale soaring pilot I still cannot grasp whats going on.
For those that haven't watched one of those lectures/presentations it's easy. Think of the wind as a tennis racket and the glider as a ball, where the wind energy from flow or velocity/inertial energy from the racket reverses the direction and increases the speed of the ball. Not directly equivalent at all, but OK for an analogy, which always falls short at some point, because it IS an analogy and not an explanation. Hopefully this one gets the point across. In 'simple stupid' fully layman mode (not implying the layman is stupid, just ignorant of the subject at hand to some extent, like the 'Whatever topic currently applies' for Idiots' books) the energy of the wind above the peak is what is driving the glider to very high ground speeds. Essentially the leeward side wind speed is relatively stationary to the high headwinds above the peak with respect to the ground. The high kinetic energy wind above the mountain top generates much higher airspeed (the current glider speed before exposure plus the headwind speed upon entry into the flowing air), and lower ground speed by a bit. Another wind speed equivalent boost occurs on the in wind turnaround, relative to the ground or stagnant airspeed on the leeward shaded side, meaning the entry back into the low energy non flowing air, another wind speed equivalent boost is imparted. On the turnaround you gain twice the ground speed at each exposure. The max speed boost is based on the ground speed boost on each pass (2X wind speed) minus the drag incurred on the wind exposed top (highest ASL, meaning altitude above sea level) turnaround. The next wind entry airspeed is the entry speed back into stagnant air (ground speed if zero wind) of the previous pass at that point minus the speed lost in the loop in the shaded wind area. At 'steady state' max airspeed, which is built up over multiple passes, meaning the speed at the point measured when max average speed has been obtained, this equalizes, more or less, and further speed cannot be accomplished. This is all talking ideal constant conditions here. In the real world all of that is variable, obviously, meaning wind speed, loop loss based on g pulled (amount of extra high speed stall induced drag incurred throughout the entire loop, etc.). Also the air transition speed at the mountain is not time or distance instantaneous, the leeward side wind speed is not zero, the wind speed at the peak is not constant, etc. In reality an analysis would require a finite element run at each small chosen interval of the passes. This effect also happens with turbine blades or the blades in a automotive torque converter. That is why you can generate much more torque at the rear wheels on launch with an automatic that is available at the output shaft of the engine. It's not something for nothing, never is, and torque can be gained in this case from a Newtonian law standpoint because the relative motion of the input to output shaft is reduced (RPM). There it is a liquid fluid, rather than a gas fluid (air), but the increased boost (torque in this case) comes from diverting the transmission fluid into the blade then back out again. That is all extremely simplified, but hopefully imparts the general idea. This will work with a full sized glider as well, though I'm quite sure it is a bit sporty bring me my brow pants kind of flight regime (severely dangerous) as low AG altitudes are required over almost all of the horizontal loop which is really what this is, since the downward Earth imposed g is pretty much negligible. The other difference is that you cannot remotely tolerate the centripetal g forces being generated here, something like 50 to 100 g, nor can your sailplane, not remotely. See, easy peasy, at least if you have had some physics, and remember it. If not it is still graspable, but not quite as peasy. Cheers. :-)
I've just watched a vlog where an engineer working on inter-stellar travel said that research is being directly influenced by these hobbyists. There is a theory that they might be able to use shear zones in the solar winds to achieve similar fuel-free acceleration for an inter-stellar probe, getting closer to light speed than would otherwise be possible. This might enable a probe to reach other star systems within a single human lifespan.
Points for effort on the filming, but the limitations of streaming video and video compression are well known. Please god, just put the camera on a tripod and leave it. That way, the only thing moving is the airplane. That will allow the codec to allow not worry about the entire scene changing rapidly. No need to zoom in, no need to follow the plane through the circle. Just set it and forget it. If some of the circles are wider than the frame, that's ok. Now get out there and do it again :) Btw, I used to DS back when the speed record was around 202mph. I got to 168mph witha Wizard DS and though my head was going to explode. Spencer is not human.
hey thank you! So next time I will hold it still on a tripod or something (; I do have some #slofie 240 fps clips that i could put on instagram #holaacchillin ? idk is that something people want to see? Some of the slow-mo footage is stationary! tbh I felt this video was ok but i did not expect a bunch of comments. Its good, i appreciate the feedback (: coma13794 there was a gentleman on the hill with a similar personal speed record to your 168 mph. I have to say that 150 mph is already fast af let alone even faster! Big winds here in southern California recently with more on the way. Maybe hit the moutain again with a tripod (; much love - AC
@@HolaACchillin thanks for taking the time to reply, and thanks for posting the footage to begin with! My day at 168mph was with around 15-17mph of wind...it doesn't take much to get it rippin'. I really thought my brain was going to catch fire. How on earth they are able to keep control at these new speeds really blows my mind. Talk about no room for error.
Its programmed into his radio for differential flaps & several other things. + 20 years of doing it might have something to do with it. He is getting old enough, I'll bet this is near his peak, reflexes slowing down. @@coma13794
i love this! Ya babbittdaWabbitt sail plane be like f the sound barrier! Turbine does look and sound cool af i admit however these sail planes on full tilt shake the earth. Over the leading edge speeds are over mach so the rumble is like a micro wind break. next time I will bring some proper equipment. This particular day i was so unprepared my car would not even make it up the steep mountain road. I met all these people cold af and out of breath lol. Funny comment,much love - AC
@@HolaACchillin The more it goes to the mach 1, sail plane will hit the limit since transonic area is very nasty. Because of area rule, it will have extremely high drag and be unstable.
I agree. Are we at that point already? one thing is 100% Spencer Lisenby will continue to go faster and faster until that wall is met. I do appreciate the comments - much love AC
RC turbined aircraft are arbitrarily speed limited. Just FYI... It takes a lot of dedication and $$$ to go faster so it makes sense DS without multi thousand $$$ turbines is the fastest currently. The ol' line of sight buggaboo bites turbine boys as well.
DS is one of the craziest subsection of the rc glider community. It's crazy how a non-motorized plane can reach those speeds... And the sound! Pretty sweet 👨🎤
you can totally feel the rumble like in your chest as these DS Gliders get moving! An experience I would like to revisit in the near future. ummm, I do not know if you read the description but i saw a live stream on yt then drove over 2 hours to watch these RC planes in person. 100% unplanned series of events led me to this mountain. much love and thank you for the comments cj! i appreciate you - much love - AC
I`ve seen quite a bit of slope soaring, but this run is something else man, I`ve seen models doing less than half that speed just EXPLODE mid-air due to the force on the wing, and I mean EXPLODE! As in seize to exist.. When you see what these models are capable of, then you can start top understand why they`re as expensive as they are, it`s really high-end engineering as far as model airplanes go. Not sure how many times I`ve watched this clip, but I`m gonna watch it again, and show it to my friends, because it`s absolutely ridiculous to see something with no engine go transonic :o
Just did some math. The record plane at 9.0kg (according to stats page) and 245m/s has a kinetic energy of 270 kilojoules. A .50bmg round has a kinetic energy of 17 to 20 kilojoules. Getting hit with one of these would be not much fun at all.
@@lililililililili8667 A .50 round has a much smaller cross section, which gives you an impact force over a smaller area => high pressure. Both kinetic energy and pressure matters, but I agree getting hit by one of these planes would not be fun. Probably lethal but probably not pink mist territory.
Yea, I fly Rc gliders, planes, helicopters. And I fly paragliders and I’m definitely in the loop with a lot of these groups. I saw this guys video a few days ago about breaking the previous record which I believe was about 527 and was holding for a really long time considering how fast these gliders and technology are improving. They are incredibly fast and there’s no way I could fly one, so the guys that do have seriously super human reflexes!! Cool shit man
i really do appreciate this comment! I truly never heard of anything like this until that very day. I filmed it as someone who was clueless because i was clueless. Now youtube is saying they want more first time #holaacchillin videos like this... crazy times rn... The reason I really like comments like this and others, it allows me to see yalls perspective as seasoned pilots. Getting input on videos is so valuable for people like me who fly, film, and edit their own footage. Spencer Lisenby i think was holding the older 500 plus mph record and he told me he was chasing that record for two years, then went out and broke it. Links to his seminar, youtube channel are in the description. I wanted to make sure and give all the credit to the man himself with plenty of information in the description. much love, much appreciated - AC
You are amazing!!! You really are Americans!!! I expect you to approach the limit of sound with the arrow-shaped wing! I really admire you because I completely understand what you are doing... Greetings from distant Bulgaria!
it looks like the only thing that prevents the glider from speeding up even more is it's drag also the shear speed of it sorta reminds me . of those weird blury floating dots . that some think are ufo's
Record for Hawks is held by the Peregrine Falcon... 36 to 49 cm (14.2 to 19.3 inches) in length. Strong and fast, they hunt by flying high and then diving at their prey. Attaining tremendous speeds of more than 320 km (200 miles) per hour, they strike with clenched talons and kill by impact.
It's is called dynamic soaring. Uses wind gradient. Different wind speeds at different altitudes. You accumulate energy on each cicle. Albatross es use similar principle to fly great distances over see effortlessly.
Interesting this was at Parker . Weldon has had the recent records the last so many years , all in California! They've achieved 500+ in NZ this last year.
The speed of sound varies according to the the materials ability to transmit it. In this cas case the barometric pressure and temperature are a part of the equation.
As I understand it these rc planes are close to transonic speeds. An entire seminar link in the description from Spencer Lisenby explains more in depth including his own swept wing design from 2 years ago. This is a great discussion going transonic! Please check out the link to the 1 hour speech by the man himself, answers so many questions imo. Hey thank you 🙏 Much love - AC
I would think not as there are supersonic aircraft that only have tapered wings with no sweep. One thing that will have to change is getting away from stab and elevator and going to stabilator to maintain pitch control when they get more into the transonic region.
if I follow what you are saying and i think i do.. ya... idk anything about high speeds like transonic stuff. Maybe some answers here... DSKinetic.com dsTransonic planes on that website. Myself, I was kinda told which soarer to purchase. I plan on updating with a video transmitter and flight controller. Now i will not be flying anywhere near those speeds but it will be great fun fpv. I love the fact these are like 10 pounds in weight! I would love to fly one 99mph first person view. i would imagine there is some challenges but consider the top leading edge of the wing is going over mach 1 already. Include what i saw in speeds on that mountain believe todays tech might have on major leap soon in speed without change. idk, maybe not. good debate and i appreciate the questions/comments.
@@HolaACchillin it all has to do with compressibility at high transonic speeds the shockwave from the front of the horizontal stabilizer makes elevators ineffective look up the X-1 they have great blurb about this and Yeager used the horizontal trim to fly the X-1 too maintain control. Another plane that suffered many accidents due to compressibility was the P-38 when it entered a high speed dive the elevator became ineffective.
I love the intel! I will definitely check out the X-1. I’m interested in learning more about this subject. Thanks Issac for all your help so far. I love it!
@@coma13794 we are literally new to any of this RC stuff. Until the day of the film I had never even heard the words Slope soaring or dynamic soaring. So like we have no clue tbh. It’s up to the OGs like you to help educate us. That’s why I did this video. Everyone on the mountain that day was so helpful and they understood I was out of my element. I honestly was scared to death for like 4 hours straight. I appreciate the comments, just know we know nothing about this particular field.
@@HolaACchillin I didn't realize it was your first time seeing it. You must've been flat out losing your mind! The first time I saw it being done, the speeds were around 130-150 and my eyes were not doing a good job of keeping up with the airplane...not because it's hard to track an object going that fast, but simply because I was not used to seeing an RC glider move at that speed, so my brain kept expecting it to go slower. Thanks again for posting!
I put my story in the description but to recap I saw a stream with these fellas flying fast. I dropped everything compelled to see this with my own eyes. Yes! I was completely staggered at the speed. I kept following the sound in the video but the plane was so far ahead of my ears. Out of breath because my crown Victoria could not make the steep mountain climb I met Spencer. I had no clue what was about to happen. Spencer asked me where I came from and I said 2.5 hour drive and I just climbed this mountain to see these birds fly! Your story is really great too. I think I failed to explain my knowledge of what was going on as I was completely overwhelmed with excitement. I do appreciate all the comments and I think the video is the only one of its kind. If I get another chance I will bring equipment with me and DEFINITELY get a steady shot! Thank you Coma 13794 for the conversation. I do appreciate you writing back and telling me your story (: I will never forget that day! Dynamic Soaring at those speeds is totally a bucket list item for anyone. It is truly terrifying to be in the situation I was in. I hope to experience it again soon! Much love - AC 💯❤️
I know its so hard to see these things in video. The sound is pretty good in the video imo but in person it is chest pounding! Thank you for your comment. Hopfully I get a chance to film something like this in 2021.
Incredible to see these speeds. Actually Turkey Vultures and other bird have been dynamic soaring for eons. I've even seen them dynamic soaring the lee side of a row of tall trees. I wish I had he skill and nerves to try this!
Every time the glider loops it essentially gains more speed. From cruising to hundred of miles and hour in less than 1 minute. Hey I appreciate the comment, I hope to visit this location again soon! 🙏🙏🙏🙏🤝
I just stumbled upon this whole genre of flying, so forgive me a beginner's question: Doesn't the trans sonic range begin at Mach 0.8, i.e. around 960 kph? Were you at a an altitude were the speed of sound is sufficiently reduced to have 740 kph at or above Mach 0.8?
Check the link in the description that goes to Spencer's talk on DS. It gets a bit technical but the idea is how the speed of the air is hitting the leading edge of the wing and then forced back down on the top of the wing is a tremendous amount of force. I don't think they're technically "transonic" but are "in the transonic range." Spenser did just put out some videos of a new swept wing prototype which has the goal of going into the transonic range (and hopefully beyond).
that would be so cool! In the description is a link to Spencers channel and I believe he has a video with fpv on one of the wings. hope this helps and thank you for checking out my video!
Hello Kenny! I filmed this on top of a mountain about an hour north of Santa Clarita California. I almost made it with my car but ended up hiking the last 1/2 mile or so. Hey thank you for the question & I put a bit of extra information in this videos description for ya 🤝
thank you goes to passing down the technology from one generation to the next. Thank you Joe for inspiring one of the worlds best ds pilots! I put the story in the video as a gift to the og person who in turn caused a series of events that led to me on that mountain on that day watching this incredible event. Like that story was taken from a seminar - link in the description.
I’ll give you that, ya I never planned on filming that day because they were live streaming it early on. 2.5 hours later I show up out of breath because my car wouldn’t make it up the mountain 😂 lol, Idk maybe I was nervous the whole time. I used an iPhone 11 Pro Max to record. Not the best equipment I know but that’s all I had with me. Next time I will bring some proper equipment to record. All in all no, I did not shake the camera on purpose but I see what your saying. Hey thanks for the comment, I appreciate you Much love - AC
I think on spencer’s channel ( link in the description) he has a video w/ onboard cam. He also makes these things too. I’m picking up one myself, just not the $6000 one. I’m looking at a $300 item to start
@@HolaACchillin have you flown Rc before? If not I would not start expecting to dynamic soar in 50 mph winds, get a slope glider that is tough and fly the windward side, but if you practice there then get a faster carbon bird and hopefully not crash it
Is this essentially what albatross do? They kind of turn up into the wind, then dive bomb at the ocean to pick up speed without a lot of flapping as I'm given to understand by a former ornithology professor. I've never see an albatross irl, alas.
What happens, if the plane gets out of control or stalls and only a fraction of it hits a spectator? I thought, People normall hide behind rocks for that kind of measurement. That is a projectile, no plane anymore.
100% agree. I really was scared, it was crazy. Definitely do not try this, no on is allowed to be in the area. I filmed this pretty much as it happened. Hey appreciate your knowledge and concerns. 💯🤝
1st thank you au69miner for the question and the answer can be found in the descriptions links. There is a 1 hour seminar hosted by the person who is in this video breaking the record - link link to Spencer Lisenby youtube channel. He manufactures and holds the speed record with these planes. I personally have almost zero knowledge so i do apologize. I flew my first plane two weeks ago and will be posting footage of my progress as I attempt Dynamic soaring in the near future. Much love and i think it way over 40 g-force - AC
In his talk he says that in some of their testing they measured 120 G’s, but that the sensor they were using can’t measure over 120 G’s so it was most likely some amount over 120 G’s (but normally more around 40-60 G’s).
@@babybirdhome I think I say somewhere they calculated the G's from the speed and the lap time (giving you the turning radius), that is probably a reasonable way. But I can't remember the number.
turning at 500mph is, in itself, not amazing. Airliners do this all the time. What IS amazing is completing a fully 360 degree turn inside of a couple of seconds. What's INSANE is that the turn isn't continuous, which means that the bulk of load is happening in short windows WITHIN that 2-3 sec turn, which makes the g-loading even higher than if it had been a continuous turn. One way to think of it is this...you're doing 540mph heading one way. Now you need to accelerate such that you're doing 540mph the other way (180 deg turn), now you do ANOTHER 180 turn to return to your original trajectory. That's basically like going from 0 - 2160mph inside of 2-3 seconds, except it's not all happening smoothly. It's....ridiculous. :)
@@coma13794 That is not the correct way to see it. Look at it, it is an almost perfect circle with corrections. So in the first approximation you can see it as a continuous circle with constant speed, giving these 50g (and is compensating the centrifugal force the tight circle causes). What DOES come in addition is the difference in windspeed of the surrounding air. When the plane flies into the windshear, here the windspeed changes by 80 mph. But compared to the 540 mph that is "just" 15%. But as this is a sudden "impact", that needs overproportional strengthening. Your error is that you look at it from the outside. But the forces appear in the plane "swimming" in the air. (Please do not feel offended) Flat earthers do the same error, looking from e.g. the sun at a point on the surface of the earth, saying that due to the rotation of the earth the point has to accelerate and decelerate constantly during the day (seen from the sun. But we know the overhelming force is gravity towards the center of the earth, only slightly lessened by centrifugal force due to the rotation, of max. 0.3% of gravity (300 times more). Feel free to ask, I am sure that was not easily understandable. Let's make science, you try to disprove my claims, and I try to defend them - or fail.
I know a camera would totally foul the aerodynamics, but I want to see FPV footage from these gliders. Mayhe a transparent nose with a camera inside, like a missile?
That would be awesome! I think there is a problem with the g-forces and electronics rn. I do believe they have tried everything but nothing will hold up the the immense g-forces. i am not 100% on that but yes, i would be cool to add a virtual tracer on the plane!
Seems like the best cameraman is the pilot with gopro on head. I've seen most of the record videos on RUclips, this one is descent. In general, it's difficult to video something traveling over 500mph.
in person I can tell you i was Terrified. I dug in the side of the mountain and proceeded to enjoy my afternoon. Filming these rc dynamic gliders was a bit of a challenge with the wind. I would love to get some serious audio equipment next go around! I spoke with Spencer and he said he has been chasing his older 545 mph record for 2 whole years. Breaking this current 548 mph speed record is 100% possible. with three high end radar detectors i personally saw all read same speeds all day. Dsing is fast af and scary af and beautiful af! bucket list if possible. As of today i believe the only person that will go way faster and smash the current record is Spencer Lisenby himself. much love ANTH davis - AC
@@HolaACchillin On one DS video there was some strange corner protruding into the picture. Took me a while to understand that this was a solid wooden wall they were standing behind. The idea of a 300 mph crashing into someone - urgh. But a glider has a pretty pointed nose, filled with lead, and 2-5 kgs behind it. I heard that a .5 cal machine gun bullets goes through walls. The plane is way slower, but the bullet weighs just a few grams...
ya, like you can die sitting where I was sitting. People getting all huffy puffy about the footage but seriously, its fn scary af! Your story is amazing as well, its just one of those moments when everything stops to live your best life. #FPVisFriendship
Bravo pour le fake . Vous avez fait plein de vue et gagné de l’argent , mais rien ne colle , ni l’appareil de mesure , ni le temps de faire un tour avec le diamètre du tour .
Revelation 22:12-14 (KJV) And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be. I am Alpha and Omega, the beginning and the end, the first and the last. Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.
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Just brilliant little film. The whole think is mindblowing and I will for sure look at the lecture video tonight. Being a full-scale soaring pilot I still cannot grasp whats going on.
For those that haven't watched one of those lectures/presentations it's easy. Think of the wind as a tennis racket and the glider as a ball, where the wind energy from flow or velocity/inertial energy from the racket reverses the direction and increases the speed of the ball. Not directly equivalent at all, but OK for an analogy, which always falls short at some point, because it IS an analogy and not an explanation. Hopefully this one gets the point across.
In 'simple stupid' fully layman mode (not implying the layman is stupid, just ignorant of the subject at hand to some extent, like the 'Whatever topic currently applies' for Idiots' books) the energy of the wind above the peak is what is driving the glider to very high ground speeds.
Essentially the leeward side wind speed is relatively stationary to the high headwinds above the peak with respect to the ground. The high kinetic energy wind above the mountain top generates much higher airspeed (the current glider speed before exposure plus the headwind speed upon entry into the flowing air), and lower ground speed by a bit. Another wind speed equivalent boost occurs on the in wind turnaround, relative to the ground or stagnant airspeed on the leeward shaded side, meaning the entry back into the low energy non flowing air, another wind speed equivalent boost is imparted.
On the turnaround you gain twice the ground speed at each exposure. The max speed boost is based on the ground speed boost on each pass (2X wind speed) minus the drag incurred on the wind exposed top (highest ASL, meaning altitude above sea level) turnaround. The next wind entry airspeed is the entry speed back into stagnant air (ground speed if zero wind) of the previous pass at that point minus the speed lost in the loop in the shaded wind area. At 'steady state' max airspeed, which is built up over multiple passes, meaning the speed at the point measured when max average speed has been obtained, this equalizes, more or less, and further speed cannot be accomplished.
This is all talking ideal constant conditions here. In the real world all of that is variable, obviously, meaning wind speed, loop loss based on g pulled (amount of extra high speed stall induced drag incurred throughout the entire loop, etc.). Also the air transition speed at the mountain is not time or distance instantaneous, the leeward side wind speed is not zero, the wind speed at the peak is not constant, etc. In reality an analysis would require a finite element run at each small chosen interval of the passes.
This effect also happens with turbine blades or the blades in a automotive torque converter. That is why you can generate much more torque at the rear wheels on launch with an automatic that is available at the output shaft of the engine. It's not something for nothing, never is, and torque can be gained in this case from a Newtonian law standpoint because the relative motion of the input to output shaft is reduced (RPM). There it is a liquid fluid, rather than a gas fluid (air), but the increased boost (torque in this case) comes from diverting the transmission fluid into the blade then back out again. That is all extremely simplified, but hopefully imparts the general idea.
This will work with a full sized glider as well, though I'm quite sure it is a bit sporty bring me my brow pants kind of flight regime (severely dangerous) as low AG altitudes are required over almost all of the horizontal loop which is really what this is, since the downward Earth imposed g is pretty much negligible. The other difference is that you cannot remotely tolerate the centripetal g forces being generated here, something like 50 to 100 g, nor can your sailplane, not remotely.
See, easy peasy, at least if you have had some physics, and remember it. If not it is still graspable, but not quite as peasy. Cheers. :-)
@@MrJdsenior holy shit that was a good write up
Hey thanks for the intel! 🙏🙏🙏🙏 much appreciated! You are awesome! Happy holidays 🤝💯
Right! Happy Holidays Negus! 🤝🙏
@@HolaACchillin Merry Christmas to you too my friend!
I've just watched a vlog where an engineer working on inter-stellar travel said that research is being directly influenced by these hobbyists. There is a theory that they might be able to use shear zones in the solar winds to achieve similar fuel-free acceleration for an inter-stellar probe, getting closer to light speed than would otherwise be possible. This might enable a probe to reach other star systems within a single human lifespan.
That’s how I got here, too 😂
Can you link that?
Me too
@@patricklogan313 FraserCain, interstellar travel without breaking physics.
Points for effort on the filming, but the limitations of streaming video and video compression are well known. Please god, just put the camera on a tripod and leave it. That way, the only thing moving is the airplane. That will allow the codec to allow not worry about the entire scene changing rapidly. No need to zoom in, no need to follow the plane through the circle. Just set it and forget it. If some of the circles are wider than the frame, that's ok. Now get out there and do it again :) Btw, I used to DS back when the speed record was around 202mph. I got to 168mph witha Wizard DS and though my head was going to explode. Spencer is not human.
hey thank you! So next time I will hold it still on a tripod or something (;
I do have some #slofie 240 fps clips that i could put on instagram #holaacchillin ? idk is that something people want to see?
Some of the slow-mo footage is stationary!
tbh I felt this video was ok but i did not expect a bunch of comments. Its good, i appreciate the feedback (:
coma13794 there was a gentleman on the hill with a similar personal speed record to your 168 mph. I have to say that 150 mph is already fast af let alone even faster!
Big winds here in southern California recently with more on the way. Maybe hit the moutain again with a tripod (;
much love -
AC
@@HolaACchillin thanks for taking the time to reply, and thanks for posting the footage to begin with! My day at 168mph was with around 15-17mph of wind...it doesn't take much to get it rippin'. I really thought my brain was going to catch fire. How on earth they are able to keep control at these new speeds really blows my mind. Talk about no room for error.
Its programmed into his radio for differential flaps & several other things. + 20 years of doing it might have something to do with it. He is getting old enough, I'll bet this is near his peak, reflexes slowing down. @@coma13794
You won't be able to see anything that way.
Turbine powered rc pilot: We go fast.
Sailplane rc pilot: Hold my beer.
i love this! Ya babbittdaWabbitt sail plane be like f the sound barrier! Turbine does look and sound cool af i admit however these sail planes on full tilt shake the earth. Over the leading edge speeds are over mach so the rumble is like a micro wind break.
next time I will bring some proper equipment. This particular day i was so unprepared my car would not even make it up the steep mountain road.
I met all these people cold af and out of breath lol.
Funny comment,much love -
AC
@@HolaACchillin The more it goes to the mach 1, sail plane will hit the limit since transonic area is very nasty. Because of area rule, it will have extremely high drag and be unstable.
I agree. Are we at that point already?
one thing is 100%
Spencer Lisenby will continue to go faster and faster until that wall is met.
I do appreciate the comments
- much love
AC
RC turbined aircraft are arbitrarily speed limited. Just FYI... It takes a lot of dedication and $$$ to go faster so it makes sense DS without multi thousand $$$ turbines is the fastest currently. The ol' line of sight buggaboo bites turbine boys as well.
DS is one of the craziest subsection of the rc glider community. It's crazy how a non-motorized plane can reach those speeds... And the sound! Pretty sweet 👨🎤
you can totally feel the rumble like in your chest as these DS Gliders get moving! An experience I would like to revisit in the near future. ummm, I do not know if you read the description but i saw a live stream on yt then drove over 2 hours to watch these RC planes in person. 100% unplanned series of events led me to this mountain.
much love and thank you for the comments cj! i appreciate you - much love -
AC
I`ve seen quite a bit of slope soaring, but this run is something else man, I`ve seen models doing less than half that speed just EXPLODE mid-air due to the force on the wing, and I mean EXPLODE! As in seize to exist..
When you see what these models are capable of, then you can start top understand why they`re as expensive as they are, it`s really high-end engineering as far as model airplanes go.
Not sure how many times I`ve watched this clip, but I`m gonna watch it again, and show it to my friends, because it`s absolutely ridiculous to see something with no engine go transonic :o
Just did some math. The record plane at 9.0kg (according to stats page) and 245m/s has a kinetic energy of 270 kilojoules. A .50bmg round has a kinetic energy of 17 to 20 kilojoules. Getting hit with one of these would be not much fun at all.
Would turn you into pink mist. I wonder how it compares to one of those rx9 hellfire missiles with the sword blades.
@@lililililililili8667 A .50 round has a much smaller cross section, which gives you an impact force over a smaller area => high pressure. Both kinetic energy and pressure matters, but I agree getting hit by one of these planes would not be fun. Probably lethal but probably not pink mist territory.
Came here from a comment on pbs spacetime and they were right, this is mind boggling!!
IRL exploits fr
I love how stoked you are leaving the site. This stuff is freaking amazing.
Yea, I fly Rc gliders, planes, helicopters. And I fly paragliders and I’m definitely in the loop with a lot of these groups. I saw this guys video a few days ago about breaking the previous record which I believe was about 527 and was holding for a really long time considering how fast these gliders and technology are improving. They are incredibly fast and there’s no way I could fly one, so the guys that do have seriously super human reflexes!! Cool shit man
i really do appreciate this comment! I truly never heard of anything like this until that very day. I filmed it as someone who was clueless because i was clueless. Now youtube is saying they want more first time #holaacchillin videos like this... crazy times rn...
The reason I really like comments like this and others, it allows me to see yalls perspective as seasoned pilots. Getting input on videos is so valuable for people like me who fly, film, and edit their own footage.
Spencer Lisenby i think was holding the older 500 plus mph record and he told me he was chasing that record for two years,
then went out and broke it.
Links to his seminar, youtube channel are in the description. I wanted to make sure and give all the credit to the man himself with plenty of information in the description.
much love, much appreciated -
AC
You are amazing!!! You really are Americans!!!
I expect you to approach the limit of sound with the arrow-shaped wing!
I really admire you because I completely understand what you are doing...
Greetings from distant Bulgaria!
Wow, hey old friend, I was looking into this amazing flight technique and lo and behold, here's a vid from your good self! Hope you are well mate!
it looks like the only thing that prevents the glider from speeding up even more is it's drag
also the shear speed of it sorta reminds me . of those weird blury floating dots . that some think are ufo's
The airflow over the wing speeds up and can become supersonic which increases the drag exponentially so you’re technically correct
100 percent.
That's quite the physics exploit! I wonder if there are any practical applications in things like wind power or motor-less passenger aircraft?
WHHHAAAAAT ? the wind alone got you to 550mph ?? thats absurd. does that mean birds can do this ?!!? 500 MPH HAWKS ?!??!
what kinda G's are these things pulling !?!!!!!!!!!!!!!
Record for Hawks is held by the Peregrine Falcon...
36 to 49 cm (14.2 to 19.3 inches) in length. Strong and fast, they hunt by flying high and then diving at their prey. Attaining tremendous speeds of more than 320 km (200 miles) per hour, they strike with clenched talons and kill by impact.
@@uncletrashero60 to 80g's. Peak at 100 plus g's
@@LemonySnicket-EUC holy crap i cant believe these little model planes dont fold into 20 pieces at those Gs thats crazy
It's is called dynamic soaring.
Uses wind gradient. Different wind speeds at different altitudes.
You accumulate energy on each cicle.
Albatross es use similar principle to fly great distances over see effortlessly.
Interesting this was at Parker . Weldon has had the recent records the last so many years , all in California! They've achieved 500+ in NZ this last year.
That is so fast! I can’t wait to go see it in person again you feel the rumble in the chest!
The speed of sound varies according to the the materials ability to transmit it. In this cas case the barometric pressure and temperature are a part of the equation.
Какая перегрузка действует на конструкцию планера во время рекордного полëта ?
What kind of wing spars does this thing have?? Titanium? Railroad tie? The forces must be immense!
Steel spars. CF wing skins.
If this stuff is getting into transonic speeds, is it time to start using swept wings like jetliners, or even delta wings?
As I understand it these rc planes are close to transonic speeds. An entire seminar link in the description from Spencer Lisenby explains more in depth including his own swept wing design from 2 years ago.
This is a great discussion going transonic! Please check out the link to the 1 hour speech by the man himself, answers so many questions imo.
Hey thank you 🙏
Much love -
AC
I would think not as there are supersonic aircraft that only have tapered wings with no sweep. One thing that will have to change is getting away from stab and elevator and going to stabilator to maintain pitch control when they get more into the transonic region.
if I follow what you are saying and i think i do.. ya... idk anything about high speeds like transonic stuff. Maybe some answers here... DSKinetic.com dsTransonic planes on that website.
Myself, I was kinda told which soarer to purchase. I plan on updating with a video transmitter and flight controller. Now i will not be flying anywhere near those speeds but it will be great fun fpv. I love the fact these are like 10 pounds in weight! I would love to fly one 99mph first person view.
i would imagine there is some challenges but consider the top leading edge of the wing is going over mach 1 already. Include what i saw in speeds on that mountain believe todays tech might have on major leap soon in speed without change.
idk, maybe not. good debate and i appreciate the questions/comments.
@@HolaACchillin it all has to do with compressibility at high transonic speeds the shockwave from the front of the horizontal stabilizer makes elevators ineffective look up the X-1 they have great blurb about this and Yeager used the horizontal trim to fly the X-1 too maintain control. Another plane that suffered many accidents due to compressibility was the P-38 when it entered a high speed dive the elevator became ineffective.
I love the intel! I will definitely check out the X-1. I’m interested in learning more about this subject. Thanks Issac for all your help so far.
I love it!
sitting there watching thst was mighty dangerous
The engine sounds amazing as it rushes by!
Great video. The speed on those things are insane, they must be good pilots!
I want a dsing wing now lol. Hope your fam is doing well. Thanks for the comment bro bro!
That might qualify for Understatement of the Year :)
@@coma13794 we are literally new to any of this RC stuff. Until the day of the film I had never even heard the words Slope soaring or dynamic soaring. So like we have no clue tbh. It’s up to the OGs like you to help educate us.
That’s why I did this video. Everyone on the mountain that day was so helpful and they understood I was out of my element. I honestly was scared to death for like 4 hours straight.
I appreciate the comments, just know we know nothing about this particular field.
@@HolaACchillin I didn't realize it was your first time seeing it. You must've been flat out losing your mind! The first time I saw it being done, the speeds were around 130-150 and my eyes were not doing a good job of keeping up with the airplane...not because it's hard to track an object going that fast, but simply because I was not used to seeing an RC glider move at that speed, so my brain kept expecting it to go slower. Thanks again for posting!
I put my story in the description but to recap I saw a stream with these fellas flying fast. I dropped everything compelled to see this with my own eyes. Yes! I was completely staggered at the speed. I kept following the sound in the video but the plane was so far ahead of my ears. Out of breath because my crown Victoria could not make the steep mountain climb I met Spencer. I had no clue what was about to happen. Spencer asked me where I came from and I said 2.5 hour drive and I just climbed this mountain to see these birds fly!
Your story is really great too. I think I failed to explain my knowledge of what was going on as I was completely overwhelmed with excitement. I do appreciate all the comments and I think the video is the only one of its kind. If I get another chance I will bring equipment with me and DEFINITELY get a steady shot!
Thank you Coma 13794 for the conversation. I do appreciate you writing back and telling me your story (: I will never forget that day! Dynamic Soaring at those speeds is totally a bucket list item for anyone. It is truly terrifying to be in the situation I was in. I hope to experience it again soon! Much love -
AC 💯❤️
I love watching the sky go left and right, and the sound. Wish I could see something! 😎.
I know its so hard to see these things in video. The sound is pretty good in the video imo but in person it is chest pounding! Thank you for your comment. Hopfully I get a chance to film something like this in 2021.
@@HolaACchillin You have to believe it to see it...
Incredible to see these speeds. Actually Turkey Vultures and other bird have been dynamic soaring for eons. I've even seen them dynamic soaring the lee side of a row of tall trees. I wish I had he skill and nerves to try this!
The engine sounds amazing at the high speeds!
TY for sharing ^_^
Greetings from Switzerland 🙂
Subscribed.
Thank you! I have many new videos soon! Hello from Southern California 🤝
Whose gere after the Fraser Caine video? Thus stuff is cool as hell, applying the concept to space travel via silar winds is even cooler.
Everybody gangsta until it goes supersonic
Man what a nice video. Tastes so good
Thank you 😋
I appreciate that!
much love -
AC
Did you ever end up putting a g meter in the wing? Im curious what kind of pull, im ultra impressed the wings of the aircraft dont clap like hands.
They did and the meter averaged 60-80g and has also maxed out at 120g
l have been flying rc for 50 years and l have never seen anything like this just mind blowing and one helluv challenge
Omg, how's the glider gain up the speed without motor? And how long it takes to reach that speed?
Every time the glider loops it essentially gains more speed. From cruising to hundred of miles and hour in less than 1 minute. Hey I appreciate the comment, I hope to visit this location again soon! 🙏🙏🙏🙏🤝
I just stumbled upon this whole genre of flying, so forgive me a beginner's question: Doesn't the trans sonic range begin at Mach 0.8, i.e. around 960 kph? Were you at a an altitude were the speed of sound is sufficiently reduced to have 740 kph at or above Mach 0.8?
Check the link in the description that goes to Spencer's talk on DS. It gets a bit technical but the idea is how the speed of the air is hitting the leading edge of the wing and then forced back down on the top of the wing is a tremendous amount of force. I don't think they're technically "transonic" but are "in the transonic range." Spenser did just put out some videos of a new swept wing prototype which has the goal of going into the transonic range (and hopefully beyond).
@@GatorGliderThanks, I'll have a look.
what an experience!
SLICK CONTENT DUDE! KEEP GOING! 😍😍😍😍😍😍😍😍
Appreciate you!
@@HolaACchillin you deserve it mate! 🙇♂️
We should do this in space with the solar winds. Fascinating for inner solar system travel.
try taking one of these into a tornado lmao
Insanely cool!
can yall pls put a little camera on the tip of the rudder
that would be so cool! In the description is a link to Spencers channel and I believe he has a video with fpv on one of the wings.
hope this helps and thank you for checking out my video!
This is insane!
Where is this
Hello Kenny! I filmed this on top of a mountain about an hour north of Santa Clarita California. I almost made it with my car but ended up hiking the last 1/2 mile or so. Hey thank you for the question & I put a bit of extra information in this videos description for ya 🤝
Thank you Joe Wurts for the gift of dynamic soaring!
thank you goes to passing down the technology from one generation to the next. Thank you Joe for inspiring one of the worlds best ds pilots!
I put the story in the video as a gift to the og person who in turn caused a series of events that led to me on that mountain on that day watching this incredible event.
Like that story was taken from a seminar - link in the description.
Shaky camera for dramatic effect ? Is this "Blair Witch Project II" ??? LOL
I’ll give you that, ya I never planned on filming that day because they were live streaming it early on. 2.5 hours later I show up out of breath because my car wouldn’t make it up the mountain 😂 lol,
Idk maybe I was nervous the whole time. I used an iPhone 11 Pro Max to record. Not the best equipment I know but that’s all I had with me. Next time I will bring some proper equipment to record.
All in all no, I did not shake the camera on purpose but I see what your saying.
Hey thanks for the comment, I appreciate you
Much love -
AC
Just brilliant !
I appreciate you! 🥰
Super awesome
Imagine if birds find out that u can do this
They already know. As soon as they invent goggles they’ll be doing it.
Nice, I want one or two! Be interesting if it had an onboard cam.
I think on spencer’s channel ( link in the description) he has a video w/ onboard cam.
He also makes these things too. I’m picking up one myself, just not the $6000 one. I’m looking at a $300 item to start
💯
@@HolaACchillin have you flown Rc before? If not I would not start expecting to dynamic soar in 50 mph winds, get a slope glider that is tough and fly the windward side, but if you practice there then get a faster carbon bird and hopefully not crash it
there's lots of on board footage out there. It's interesting for about 5 seconds, then quickly becomes unwatchable.
it blows my mind that you can make such tight turns with long wings like that at that speed and not just rip the wings off
They put ballast and electronics in the wing to minimize the leverage of the lift.
This is God damned astonishing
Put an LED on the tail wing to make it easier to see.
Insanity, so cool
I'm still studying the theory but the speed of sound is no constant anyway. I guess the supersonic boom is not hearable in the video.
🙌🏼🙌🏼🙌🏼🙌🏼🙌🏼🙌🏼
glad you liked it! much love!
If you forget to press the lever once when your plane is going up, it is on the moon.
100% I saw one slip and boom into the ground! It was the craziest sound ever💯 hey thank you Roland for the comment ❤️
Is this essentially what albatross do? They kind of turn up into the wind, then dive bomb at the ocean to pick up speed without a lot of flapping as I'm given to understand by a former ornithology professor. I've never see an albatross irl, alas.
Just one minute of explaining dynamic soaring? A lot of interested people deserve the respect of an intro.
What happens, if the plane gets out of control or stalls and only a fraction of it hits a spectator? I thought, People normall hide behind rocks for that kind of measurement. That is a projectile, no plane anymore.
100% agree. I really was scared, it was crazy. Definitely do not try this, no on is allowed to be in the area. I filmed this pretty much as it happened. Hey appreciate your knowledge and concerns. 💯🤝
Also done on sides of thermals but we dont talk bout that....hurts egos 😂😂😂
the stresses on that plane must be incredible....500+mph turns....honeycomb carbon fiber?
1st thank you au69miner for the question and the answer can be found in the descriptions links. There is a 1 hour seminar hosted by the person who is in this video breaking the record - link
link to Spencer Lisenby youtube channel. He manufactures and holds the speed record with these planes. I personally have almost zero knowledge so i do apologize.
I flew my first plane two weeks ago and will be posting footage of my progress as I attempt Dynamic soaring in the near future.
Much love and i think it way over 40 g-force -
AC
In his talk he says that in some of their testing they measured 120 G’s, but that the sensor they were using can’t measure over 120 G’s so it was most likely some amount over 120 G’s (but normally more around 40-60 G’s).
@@babybirdhome I think I say somewhere they calculated the G's from the speed and the lap time (giving you the turning radius), that is probably a reasonable way. But I can't remember the number.
turning at 500mph is, in itself, not amazing. Airliners do this all the time. What IS amazing is completing a fully 360 degree turn inside of a couple of seconds. What's INSANE is that the turn isn't continuous, which means that the bulk of load is happening in short windows WITHIN that 2-3 sec turn, which makes the g-loading even higher than if it had been a continuous turn. One way to think of it is this...you're doing 540mph heading one way. Now you need to accelerate such that you're doing 540mph the other way (180 deg turn), now you do ANOTHER 180 turn to return to your original trajectory. That's basically like going from 0 - 2160mph inside of 2-3 seconds, except it's not all happening smoothly. It's....ridiculous. :)
@@coma13794 That is not the correct way to see it. Look at it, it is an almost perfect circle with corrections.
So in the first approximation you can see it as a continuous circle with constant speed, giving these 50g (and is compensating the centrifugal force the tight circle causes).
What DOES come in addition is the difference in windspeed of the surrounding air. When the plane flies into the windshear, here the windspeed changes by 80 mph. But compared to the 540 mph that is "just" 15%. But as this is a sudden "impact", that needs overproportional strengthening.
Your error is that you look at it from the outside. But the forces appear in the plane "swimming" in the air.
(Please do not feel offended)
Flat earthers do the same error, looking from e.g. the sun at a point on the surface of the earth, saying that due to the rotation of the earth the point has to accelerate and decelerate constantly during the day (seen from the sun.
But we know the overhelming force is gravity towards the center of the earth, only slightly lessened by centrifugal force due to the rotation, of max. 0.3% of gravity (300 times more).
Feel free to ask, I am sure that was not easily understandable.
Let's make science, you try to disprove my claims, and I try to defend them - or fail.
Unreal. How!?
Can't wait for 768mph
That would be so scary to witness in person!
@@HolaACchillin And scary to hear - the supersonic boom meters away from you...
Great pics of the sky and clouds. Other than that........
Watch in 4k and focus. Haha ! . You should go try to track something that does tight laps at 550mph.
I know a camera would totally foul the aerodynamics, but I want to see FPV footage from these gliders. Mayhe a transparent nose with a camera inside, like a missile?
That would be so cool! I appreciate the comment! Thank you!
Y'all need a camera with a faster frame rate!
this is madness! and al VLOS??? madness 550ph!!!!!! wtf
Put a small camera on the glider.
Red bull should attempt this with a full size glider
Oh Snap ! 😅
thats still something damn
so fast. So scary in person! I had so much fun!
Archieluxury sent me!
Thank you 🙏!
Would be nice if they could put a virtual tracer on the plane.
That would be awesome! I think there is a problem with the g-forces and electronics rn. I do believe they have tried everything but nothing will hold up the the immense g-forces.
i am not 100% on that but yes, i would be cool to add a virtual tracer on the plane!
@@HolaACchillin But what might work and be beneficial for the video AND the pilot is to add some lighting.
Wow
Hmm, I think I heard a jet engine.
I'ma try this in my paraglider 🤔
With safety glasses on ..ya know. . BC " I've seen bugs splattered on the windscreen
Just Carbon and Dark matter 🖤
💯🙏
Holy sssssshit!!!!!😮😮😮😮
👍
Get e new job camera guy.......
But I like my job.... please don’t make me go back to key grip.... jk.... I guess I’m getting a gimbal :)🕺✔️
Much love -
AC
@@HolaACchillin You get a last chance
🙏
Seems like the best cameraman is the pilot with gopro on head. I've seen most of the record videos on RUclips, this one is descent. In general, it's difficult to video something traveling over 500mph.
@@rchoper21 next time John I got y’all. I will get some steady footage. Appreciate the comment 🙏
As impressive as this is it isn't transonic. Transonic is around the speed of sound which is 750mph
Why aren’t humans doing this in single-seat gliders? Too many G’s?
That's scary n cool all at once lol
in person I can tell you i was Terrified. I dug in the side of the mountain and proceeded to enjoy my afternoon. Filming these rc dynamic gliders was a bit of a challenge with the wind. I would love to get some serious audio equipment next go around!
I spoke with Spencer and he said he has been chasing his older 545 mph record for 2 whole years. Breaking this current 548 mph speed record is 100% possible. with three high end radar detectors i personally saw all read same speeds all day.
Dsing is fast af and scary af and beautiful af! bucket list if possible.
As of today i believe the only person that will go way faster and smash the current record is Spencer Lisenby himself.
much love ANTH davis -
AC
Thanks for the sub by the way in my recent post ur in it
That's cool n holly he'll scary lol all u need is a gopro 7 on top of one of those lol
Cool
@@HolaACchillin On one DS video there was some strange corner protruding into the picture. Took me a while to understand that this was a solid wooden wall they were standing behind. The idea of a 300 mph crashing into someone - urgh.
But a glider has a pretty pointed nose, filled with lead, and 2-5 kgs behind it. I heard that a .5 cal machine gun bullets goes through walls. The plane is way slower, but the bullet weighs just a few grams...
Yeah editing and fades with subtitles are really annoying tbh
I think that there is a professional photography of scientific experiments that is more accurate than this clowning that resembles NASA photography.
When you want to be REALLY fast, leave away the prop. Just useless drag...
So true after seeing this. I had no idea that these speeds are even possible.
Bro what the fuck!
What happened?
@@HolaACchillin this is just insane!
ya, like you can die sitting where I was sitting. People getting all huffy puffy about the footage but seriously, its fn scary af! Your story is amazing as well, its just one of those moments when everything stops to live your best life. #FPVisFriendship
Damnnnn
Right!
its fpv !!!!!!!!!!! wow
🙏
Vau superr
Bravo pour le fake . Vous avez fait plein de vue et gagné de l’argent , mais rien ne colle , ni l’appareil de mesure , ni le temps de faire un tour avec le diamètre du tour .
Hold your camera still. This is not good. Hard to follow with all of those overlapsing also. Stop it.
Revelation 22:12-14 (KJV) And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be.
I am Alpha and Omega, the beginning and the end, the first and the last.
Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.
So with just a little on board power, a little AI, trans ocean drone transport is the future ?