Finally upped my dynamic soaring PB over 400mph with my 35lb D130!
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- เผยแพร่เมื่อ 23 เม.ย. 2022
- Best viewed at 1440p.
Finally got my 400+mph goal!
I bought this big fat plane 7+ years ago specifically to up my PB over 400mph.
It'd be easier with a thinner/higher aspect K130 or Transonic but I just can't see them very well.
So I truck the D130 back and forth between Colorado and SoCal every couple years trying to land on week with wind big enough to pull it off, and this is the first time it's even been possible for this plane. Some years there's not enough wind to get it in the air (or land safely), and others I'm lucky if I get to fly it once. This day I flew it 5 times (self launched 3 of them) so the conditions were pretty good. I probably could have gone a few mph faster, if I'd stuck with it on this flight, but people splat planes when they keep pushing when the conditions just aren't giving it up.
If you listen to the speeds in the background, Bruce called out 400 or 401 several times so it wasn't just a momentary fluke. There was someone on another gun just behind him, that got the 403mph reading you hear at the end.
This vid is just snippets from about a 15 minute flight. I spent a lot of time churning in the 350-370 range.
Unreal! That plane was screaming!
Nice work Ian. Loving the sound of that one.
Great flight! That sound and a perfect landing to top it off!! Congrats!!!
Holy crow. Dunno how this works, but I am impressed with the structural strength of the plane. It withstood those G-loads and speeds like it was nothing, not to mention the sound!
After many decades of traditional balsa, spruce and plywood aeromodelling I was eventually tempted into the world of composites. It was quite a difference. I built large thermal-soaring gliders with spans of up to 14'. They were light, sleek, efficient, and incredibly strong.
Dynamic soaring is a very special pursuit. It's not my 'thing', but I do appreciate the skills involved. It's amazing but true that it's possible to design and build an all-composite structure which is literally (and yes, I really do mean literally) indestructible in flight.
Wrapped, layered, vacuum-laminated, epoxy-carbon and aramid-fibre components such as wing spars can be made to withstand forces in excess of anything that can be generated when flying, including pulling out of a 5,000' vertical dive as violently as possible. With careful design, it's possible to make a model that simply cannot be broken when in the air.
Having said that, there are plenty of other ways to wreck an all-composite plane. The biggest problem in dynamic soaring may well be control-surface flutter leading to servo or control linkage failure.
Oh, and if you can't pull out of that aforementioned vertical dive before terra firma interrupts, that indestructible [in flight] structure will most certailny be reduced to a big pile of black spaghetti. 😁
This stuff is crazy
Glad to see you're still flying! 400+ is very impressive, seemed like a pipe dream years ago when we flew in Lucas KS at the Midwest Slope Challenge together. Hope all is well!
Awesome Ian!
Amazing. That sound is incredible.
Awesome... and finally.
Love the sound.
awesome! congrats Ian!!!
Congrats!!!! I have a K130 and hope to be in the 400 club this year as well!
😍 that sound
Congrats Ian!! Jones is going to feel real slow now!!
Congratulations! I’ll bet you loved that sound.
Ya, the live sound is pretty awesome. I didn't have time to get a separate recording somewhere out of the wind.
Nice flying. Hope to get to weldon this spring.
Epic! 👍🏾
Awesome! Got to see Bruce fly last year at sunset.
Bruce has definitely got in his 10,000 hours.. I've never seen anyone else as nimble on the sticks.
insane
G damn it !!!
if you would please indulge me, what servos handle that kind of abuse and not deflect at those stresses of the high wind loads at that speed? and what voltage and what mah batter is used? thank you, great flight! how did it feel to get over 400mph?
Five standard sized Hitec high voltage titanium gear servos with 320-333oz-in of torque. Good for 500+mph speeds. Two 2S 1500mAh lipo or liion packs, two big toggle switches, and 3 power leads coming into the Rx with the servo outputs spaced so it looks something like this..
power, left aileron, left flap, power, right aileron, right flap, power, elevator to keep the runs on the servo power bus as short as possible.
30 minutes of flying pulled about 600mAh. Dunno what instantaneous peaks are, but probably only 2-3A and the elevator servo does most of the work. It feels good to fly over 400mph but also stressful. A huge 130 inch plane feels pretty small at those speeds. The top pilots are flying over 500mph, and the record stands at 545mph.
Incredible! what was the wind speed over the ridge?
45-55mph.
Sweet! Know it's a different animal but still would love to FPV that thing :)
a monster yes
Ya, we've put cameras on some of these planes before, and besides the added drag slowing them down a fair bit, all you really see in the vid is ground.. sky.. ground.. sky.. ground.. sky.. etc.