@@sledawgpilot We will see when we get the new normal layup in some big wind. This was a light weight version to save some money and be able to fly in lighter conditions. Hoping to see some HUGE wind in January!
In addition to what others have said, flying to the leeward side of the hill and coming back, into the wind, makes it easier to land because the wind is much slower behind the ridge.
@@QuanrumPresence Incorrect. You can say it as many times as you like, but it doesn't make an incorrect thing true. transonic (adjective) tran·son·ic tran(t)s-ˈsä-nik tran-ˈsä- 1: being or relating to speeds near that of sound in air or about 741 miles (1185 kilometers) per hour at sea level and especially to speeds slightly below the speed of sound at which the speed of airflow varies from subsonic to supersonic at different points along the surface of a body in motion relative to the surrounding air 2: moving, capable of moving, or utilizing air currents moving at a transonic speed
It’s fun to see an unpowerd glider rip through the air at fighterjet speeds. Like I just found out about what “dynamic soaring” is and it’s mindbreaking.❤
It's like ice skating, a small lateral force can be turned into thrust, and faster than the input. Same way that sailboats can sail faster than the wind.
@@friendlyfire01 that makes sense to me now. Kind of. Doesn't ice skating require leg force though? Isn't speed generated from said force? Nevermind. I think I just answered my own question. Leg force=wind force. Thanks for your input. It's greatly appreciated!
We can fly 10 to 11 times the wind speed. The speed comes from crossing into different wind speeds. World record is 568 mph! Thats ground speed. air speed is well into the 600s.
Great to see Parker Mt. again! And your exciting flights. I flew hang gliders there in the 70s. Caught a wave off the front peaks during santa ana winds. One day got up to 7,000 feet AGL: about 4K or so over Parker! That was an epic day.
That is crazy! I’ve heard of hang gliders flying Parker be never seen it. The lift is huge with big Santa Ana winds. I couldn’t imagine hang gliding it. That’s next level. 🤯
Interesting to see how you guys go. Listening to the Perlan project pilot in an interview a few months ago and they're approaching transonic speeds and are contemplating a complete new design as they've reached the performance limits for the Perlan 2.
@@NickOakley input a link up but it was deleted. Search for Perlan Project Soaring the Sky podcast. It's one of the latest ones but there's more there.
If some one can explain please. I have seen videos of this type of dynamic soaring, riding the uplift in the front of the hill, and the down draft on the back side. Speeds over 200mph. What I am curious about is that the older videos I saw the loops were pretty much vertical, but the loops this gilder is doing are maybe 20 to 30 degrees off of horizontal. Why?
I had forgotten about this. Pondering this for a while, I am thinking that maybe by going more horizontal, you get longer time in the updraft and downdraft, so more acceleration....
The model will see as high as 80 G’s during a flight. (Yes, you read that correctly. Eighty times the force of gravity.) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-nv7-YM4wno8.htmlsi=dX9lmxCzLNtjijlW
I've been piloting for a bunch of years. Both civil or general aviation aircraft as well as messing with R/C aircraft, powered and sailplanes. I really like the sailplanes but damn, this flying is on a whole different level and seeing this for the first time a few years ago, I'm just blown away! Anybody "in the know" about having a G-meter in one of these machines? The speed is no doubt incredible but the G's has to be off the hook! I'd love to know what it's pulling. Keeping them together has to be an design phenomenon. I seriously question whether I could remain sharp enough keep that thing from just augering into that mountainside!
Yes, we have put a g-meter on one and maxed it at 100Gs. DSing is never level flying for sure and totally will ruin normal RC flying for anyone that gets into it. Thanks for watching and subscribe!
Do you really need the tail? Modern design should allow for a lifting body full wing aircraft to stay stable, right? And the tail just introduces a twist on the center of the lifting wing. I feel like a tailless design would be able to pitch up stronger as well by harnessing the inherent instability. And then there's the swept wing design, since you already have a swept wing you also have a forward and aft section of the wing so you could keep it stable with a reflex wing without the tail.
Good question! Tailless planes are simply not as stable as tailed planes. DS is a very bumpy ride, tailless planes wiggle when they cross the wind shear, losing energy. Tailless planes are pitch sensitive and harder to control because the ailerons and elevator use the same surface. You are absolutely right, tailless bang the turns, there are lots of tailless RC gliders out there but most of them are foam. The non swept wing version of this plane, DS Kinetic Transonic(130" wingspan) and K2M(~80") turn just as hard as a tailless plane.
As can be inferred from my comments to previous videos I welcome swept control surfaces, which will not exhibit control reversal. Need swept winglet, too for ruder . Transonic wings are aft-loaded. The opposite of a reflex. So the aerofoil gradually changes from aft-loaded to reflex going towards the tips. So the center part has to be most stiff and do most lift. This explains the triangular planform of jets. Elliptical is for subsonic.
You are correct. This was a light built to fly in lighter regular conditions and learn how it flys. There is a new build, normal/ heavy build with lots of carbon ready for the next big wind. Thanks for watching!
Dynamic soaring, using the energy of the wind coming up and over slope as a "slingshot" Soaring birds use this technique to gain energy, and the energy gained can be applied to gain altitude with little effort, compared to a powered climb out, which is the most power costly phase of flight
It's a total shame there is music dubbed over this video. What is wrong with people? They think that we want to hear music on your video about a awesome glider........ Fail. Just fail if you think that. Do you listen to music blaring through headphones whilst flying your glider? Probably no. Why would anyone think we want to listen to damn music? It's not even a 2 minute video clip. Was it necessary? Probably more effort in dubbing the music than if you just straight uploaded the unedited video clip? I'm going to recommend to you don't put music in your videos if you want more likes? People will appreciate it more 💯%
Here is 8 minutes of just plane sounds: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UbBu4T5iazo.html I personally enjoy having some music instead of listing to wind most of the video; but to each their own. Thanks for watching!
@@nickhull83 my friend is going to get a bloody kick out of that video clip! Thank so much. My friend lives up very high on a mountain and has many thermals and gusts similar to this location? He flies pigeons and the peregrine falcons are making pickings of his birds. They would not like this glider that's for sure! Pigeons are smart and will adapt to fly and actually rely on it 😉 you wouldn't need to adapt any flight patterns for the birds either? They will learn where the glider flies and the flight path according to wind. I've never heard a glider making the same sound as a Peregrine Falcon either! People don't believe me when I tell them that at 450km/h peak dive the Falcon makes this jet sound at it pulls up out of the dive! It's so intimidating hearing it! We have other native birds as an alarm system but that's all we got cause these Falcons are stealth and use the tree line across the mountain ridge to obfuscate themselves very well! They are the ultimate killing machine but they will freak out when they hear a thing that makes a sound like that do. They will avoid. Wedge tailed Eagles on the other hand maybe a bit of a problem? 🤔 They WILL destroy that glider without and question. If they see it even if it's 10 miles away; they will B line it for the glider and they may use the same tactics as Peregrine and "mask" themselves? There's no avoiding, they will just collide with any part of themselves to disrupt it's flight then tuck a wing and do WWE move on your glider dismismembering it off its wings and dangle bits and crush the fuselage with those talons like it's nothing? The Falcon will get annoyed and go away after 4 or 5 dives at most? He gets bored and realises there is other less annoying food to eat? He's not wrestling anything that could damage his flight. The eagle gives zero f***s and will seek and destroy the flying thing in its territory! It has no interest in eating the glider lol
@@jameshatton4211 Birds often chase these planes and fly with them. Birds DS and there are birds called Swift and they literally DS. Crazy! Like and subscribe!
It does need 30+ MPH of wind and really needs 50+ before its possible to go over 500 mph. We can DS 10 to 11 times the wind speed. Thanks for watching!
@@nickhull83 Eyy, thank you for sharing the footage of the glider’s test flight. I’d love to see a larger scale model to see just how well it performs versus the traditional straight wing gliders.
We are controlling the plane with a RC transmitter. There is a receiver in the plane controlling the servos for the control surfaces. These planes have big flaps that go 90 degrees and act as air brakes. We belly land them. Thanks for watching and subscribe! 😊
@@nickhull83 I'd like to see it land from that speed Do you slowly slow it down during multiple turns? I wonder how the flaps don't just fold back under those high airspeeds?
@@blurbutnerd8355 These planes have flaps that go almost 90% and act as air brakes. Combined with lots of wind, these planes nearly come to standstill in the air. Here is a short of another plane landing at this location: ru-vid.comQtN4XIMBnsg
There is a slight updraft but the speed is from crossing the sheer layer where there are 2 different wind speeds. The acceleration comes from crossing through this wind sheer.
I wonder if they can find a location with equally good wind and slopes, but providing longer legs on the looping circuit. Imagine if they go from the tearing noise to zipping by quietly ever so briefly before cracking the whip.
The tighter circuit you fly, the more times you cross the wind shear layer in a given period, the faster the plane goes. The speed / energy comes from crossing the wind shear layer, AKA different wind speeds.
The spar system is way too complicated for minimum efficiency gains. This is a 3 piece wing so the joiners and joiner boxes would have to be curved too.
Sweet to see Spencer out with this model again. I can't wait to hear about it doing 540+MPH speeds! When is the best time of year at this location for DS? Seems like I recall a lot of the records falling in the Spring last time.
This is a totally new mold / design. Spencer just built a heavy one of these and expect it to go very fast. You can fly Parker Mtn. year round but we typically fly it fall - winter when Santa Ana winds (NE Wind) are best.
@@nickhull83 maybe it was Westin that I was watched the vid with 548 run. I know Spencer in one of his talks mentioned swept wing design and difficulties with it. I hope he'll give an update on why he went with these wings. Is he, you, or anyone else keeping a thread running on RCGroups?
I think 340 mph was the fastest of that flight. The pilot is the world record holder at 568 mph. Yes we have measured the g loading and we maxed the g meter at 100 gs.
The transonic realm starts at Mach 0.8. This days didn’t have huge wind but the speed record is 568 mph ground speed. Wind speed in 650ish which is in the transonic realm. Finally the air passing over the wing at 500 + is very close the super sonic if not over. ❤
The current record is 568 MPH. Naturally 600 would be the next big milestone but anything over 568 is a world record. This plane was a light test version, there is a new heavy build ready to go and we are just waiting for some big wind. Thanks for watching and subscribe!
There hasn’t been much wind lately. I’m hoping Monday there is some wind to kick off 2024! We probably need 100 mph of wind to have a shot at getting close to Mach 1 but it’s highly unlikely. Thanks for watching and subscribe!
@@DouglasEKnappMSAOM You go up-wind while "hiding" from the wind behind the hill, then climb into the big wind above the top of the hill and get blown downwind. Then repeat. In this way, you gradually increase your energy with each loop. Now, that's over-simplified since "blown down wind" means you can never go faster than the wind (so the big energy gain comes from going crossways to the wind) and it's ignoring gravity, but it's an easy way to think of where the energy is coming from.
These planes have large flaps that go almost 90 degrees and act as air breaks. We belly land them and slow as we can get them. Thanks for watching and subscribe! 😊
@@nickhull83 this is peak G loading, but what is the average would you say? and is the minimum when it's going up and down? i have to watch some talks on DS :))))
Video would've been nice if out the little girl voice singing background music. It was annoying Lee interfering with hearing the atmosphere being rippled by that high speed RC glider. Why is it that people think videos need background music.
I put up a short on landing at this location. These planes have large flaps and act as air breaks we can almost hover these planes in lots of wind. ru-vid.comQtN4XIMBnsg
You would either miss the bottom or top turn if I held the camera still. I know it sucks but it’s a give and take out there. Thanks for watching and subscribe!
@@krzysztofbosak7027 the 568 mph is ground speed not airspeed. Transonic realm occurs around mach 0.8, the true airspeed on the record day was around 640 mph because the wind was around 70 mph. The airspeed over the wing and control surfaces is even faster. Thanks for watching!
Agreed. There aren’t many people in the world with the skill to DS. The pilot in this video is the world record holder, designer and builder of this plane so we are not in much danger. Thanks for watching!!
If you didn't have the awful soulless music in the background we could have heard what the man with the speed gun was saying. As it is the video gives nothing but irritation when without the music it would have been exciting.
@EatsLikeADuck To be fair, he said that he wanted to more clearly hear what the guys with speed guns and pilot were saying and possibly the sound of the wings slicing the air. Adjusting the volume lower or Off DOES NOT help in that regard. 🙄
The volume control isn't music specific on my phone or computer so your comment is more than a little facetious and doesn't answer the question as to why you put the music there in the first place. Still, your loss really as it informs me not to bother with any more of your videos. @@EatsLikeADuck
@@bbfoto7248 You make a fair point about missing the part about not hearing the man with the speed gun. That said Chris could have easily left out the "awful soulless" commentary. It was obnoxious on his part.
You are right. That part of the comment was unnecessary and did not help my argument but I stand by the rest of my comment. I do get annoyed with what is otherwise very good content being rendered silent by irrelevant unnecessary music. @@EatsLikeADuck
It is pointless. whenever you reach mach1, ailerons become ineffective. If you would achieve such speed when wing sweep matters, you would loose control at the same time. You are delusional about going transsonic.
These are unpowered gliders and not sure supersonic is possible. The CG also changes at supersonic speed. This is all R&D and testing. Thanks for watching!
If that were the case, early transsonic actual aircraft would all have crashed. In any case, I'm sure they can mix in some roll with the pitch on the rear surfaces and flick over to elevon mode if it becomes a problem.
@@technicalfool "If that were the case, early transsonic actual aircraft would all have crashed." And they did. Usually durign dive, lack of elevator authority.
that's impressive as all hell, congrats! great job!... (Glider gets an 11 out of 10, camera operator gets a 1 out of 10... For any future video recording, put the camera on a tripod and fix it and don't move it (or give the camera to someone who can hold it still).... trying to follow a fast moving object by (a shaking) hand is headache inducing, there's just no reason for it... Just keep the camera set in one aimed spot in the middle, the wide angle of the lens will let the viewers follow the glider with their eyes )
You only see the bottom or top turn and miss a lot of the flight with a stationary tripod. The goal of this video with to film the entire flight and actual production or enjoyment was not a concern. Thanks for watching!
