Never seen a spin with AoA visible. It was suprising how quick the AoA went form 'warning' to 'spin'. Great video highlighting that!
@jaredjensen3776Ай бұрын
That is outstanding! I really need one of these in my airplane. It would enable you to fly close to the edge of your airplanes performance SAFELY. At this point I just stay well clear of stall conditions especially near the ground. Knowing how close your are to stall at any bank angle would be invaluable.
@4444jdwАй бұрын
How do I get this exact setup in my rv6 ?
@neekonsaadat2532Ай бұрын
Yeah the truth is you can exceed your critical airspeed at any angle of attack.
@PixelSergeyАй бұрын
Great demo! It's not the speed, it's the angle of attack 😁
@user-cv5rp5pi4m2 ай бұрын
Very interesting. What kind of video setup do you use??
@inletbushpilot72322 ай бұрын
Good job
@jimwillis1763 ай бұрын
I practiced this maneuver during primary training in a C-150. Years later, on an instrument flight plan, our club's C-172 swallowed a valve at about 500 feet. I couldn't see the instruments due to extreme vibration. "Atlanta departure, Cessna two-zero-tango experienced a loss of power and is returning to the field". "Ah, two-zero-tango, understand you've experienced a loss of power". "Two-zero-tango, roger". "Ah, two-zero-tango, understand you are returning to the field". "Two-zero-tango, roger". "Ah, two-zero-tango, frequency change is approved, you can cancel on the ground". "Two-zero-tango, roger". In the meantime, I was banking approximately 45 degrees and watching my airspeed. Landing checklist. Flaps 10 - 20 - 30. On the ground, a little shaky, I turned to my wife and said, "Did my voice go high pitched"?
@mikeseed-kc9hj3 ай бұрын
Nice demo. I wonder how much difference a stationary prop would make?
@mikevaccaro12483 ай бұрын
Great question: quite a bit, actually. We did engine-off testing at altitude to determine the amount of residual thrust the fixed pitch propeller provides in the test airplane. We determined that actual glide angle with the prop windmilling and engine off was within a couple of tenths of a degree of glide angle with the engine IDLE and flaps 40 set; so we use flaps 40 during low altitude testing to simulate actual engine off glide performance. This is a light-weight Catto prop. With the engine off, it will windmill at L/Dmax (maximum range glide) but will naturally stop ONSPEED (maximum endurance glide). Previous CAFE testing determined that the pilot should make no effort to intentionally try to stop the prop below 3000's AGL. With a light weight, fixed pitch prop, physics takes care of it--different story with a metal constant speed propeller. If you still have control over RPM after engine failure, drag is substantially reduced at LOW RPM (i.e., pull the prop control all the way aft to reduce drag and improve glide performance).
@maxmirot94603 ай бұрын
What are we testing in spirals?
@mikevaccaro12483 ай бұрын
Max, 45 degree banked gliding turn performance. 45 degrees of bank is optimum for a "turn back" maneuver following power loss on the takeoff. We are working on validating the glide performance modeling in the TLAR app. Part of the debate is airspeed reference vs AOA reference. Most airplanes don't have an AOA system, so we are looking at the difference in turn performance "on the buffet" (i.e., maximum instantaneous turn, which occurs at the aerodynamic [stall] limit), essentially Vref, not slower than stall warning; and ONSPEED (maximum sustained turn). Pilots brave enough to fly without AOA have a harder tactical problem when trying to "max perform" the airplane with a windscreen full of trees...there isn't any direct feed back of how hard the wing is working, save for any aerodynamic (buffet) cues and stall warning (if equipped), since that is, in fact, the only real AOA cue they have available. 🤔
@kentcolgan61393 ай бұрын
Great demo Vac. Any ETA for the new FlyOnSpeed hardware?
@HyroAUS4 ай бұрын
been watching these for a while very educational!
@mikevaccaro12484 ай бұрын
That's great! A big part of our mission is education, and it's always nice to hear from folks in the field.
@maxmirot94605 ай бұрын
Got the package. Thanks!
@maxmirot94606 ай бұрын
It is amazing how sensitive Onspeed is to G load as you bank and turn back. Nice to see it on the M5 too :)
@d-a-n-g-896 ай бұрын
Hi KZbin algorithm!
@almascapone59006 ай бұрын
looks very fascinating, probably why youtube pushed it front page to me. Would you care to elaborate further so i could understand it?
@statboy116 ай бұрын
Ground effect in aerodynamics is the effect the wings have with a nearby fixed object. In this case the ground. The air being pushed under the wings against the ground causes the plane to rise. This can be dangerous when it occurs before climbing speed is reached, as nosing up will cause the plane to fall back down. In this video it appears the lighter tail end of the plane was pushed up, but the front end was not.
@dalepryor40347 ай бұрын
Hi Vac, What is the "AOA soution " you mention in your comment of this video? Is it the new Version 4? Happy New Year! Dale Pryor
@mikevaccaro12487 ай бұрын
Hi Dale! Poor wording, I meant "what is the effect of sideslip on the accuracy of the AOA [solution]." The only wind tunnel testing was conducted by Dr Rogers using a different type of commercial probe a while back; so we are testing in the wild. Unfortunately, it's tough to have an accurate reference system to compare against since our GNSS/INS solution isn't valid under those conditions and the air data boom is suspect. Ultimately, we'll have to go back to the wind tunnel. However, the important thing to notice is that a properly calibrated coefficient of pressure system still accurately captures the stall, even when I'm generating maximum yaw.
@dalepryor40347 ай бұрын
Good to know it works at maximum yaw! Any news on V4?
@mikevaccaro12487 ай бұрын
Yes, sir!
@frankwood36327 ай бұрын
Is that an RV-4?
@maxmirot94608 ай бұрын
Ball barely moves during skids and slips. Not useful indication IMO
@IvanMidwing8 ай бұрын
Good work there Vac..
@maxmirot94608 ай бұрын
The ball on the indexer barely moves during the slips and skids. Review the video starting at 13:50. Perhaps the software needs a tweak
@maxmirot94608 ай бұрын
I need me one of them indexers!
@MasteringAviation9 ай бұрын
Mike, thank you for this masterful demonstration. Very impressive. I would very much like to have a quick chat with you about a (tiny) project I am just starting over here in Europe, mostly based around formation flying, but which will require skills upgrades for pilots before they can start flying in formation. Can you let me know how to get in contact with you directly? I cannot see any contact details on this channel. Thank you.
@HyroAUS9 ай бұрын
ive got an unlikely addiction to these types of videos! id love to see a few photos of the aircraft itself
@HyroAUS9 ай бұрын
what aircraft is this? i fly a 1946 aeronca champ
@mikevaccaro12489 ай бұрын
Hi Jacob, it's a Van's RV-4. Cheers, Vac
@mikevaccaro12489 ай бұрын
Max, working it 😁
@maxmirot94609 ай бұрын
Excellent! Thanks. Now see if you have any M5 display parts left
@IvanMidwing9 ай бұрын
Just love it! Hard to wait for the good's though..... My first priority to buy ASAP!! Cheer's Vac
@IvanMidwing9 ай бұрын
Looking forward to buy your stuff next year... (Keeping them fingers crossed:) Cheer's
@RV4aviator9 ай бұрын
Great post Mike. The only times I have flown my 4 without IAS was 1. Forgot to remove the pitot cover. And 2. with a Commercial Pilot/Instructor in the back seat on a Club day competition.. Both times ended safely, but Yikes..! didn't enjoy it. Well done mate...!
@mikevaccaro12489 ай бұрын
Thank you! Not as sporty as it looks--the key is an accurate AOA system with good performance cues...if I know when I'm at L/Dmax and on speed, I can takeoff, climb, maneuver and land with more situational awareness than I can by using airspeed. AOA responds immediately to G inputs, and provides precise "stall margin" information...I'm not smart enough to do the cockpit math real-time to adjust indicated stall speed, and our -4's provide limited buffet cues. 'Course our system uses the pitot tube, so it won't compensate for leaving a cover in place. Good thing I'VE never done that ;)
@RV4aviator10 ай бұрын
Obviously I am an RV 4 super Fan...That being said....I have flown many types, mainly Cessna varieties...( and they are wonderful aeroplanes ) but , I state for the record that Vans 4 design is the most all round safe, efficient, and flyable single engine aeroplane that ANY pilot wishes to own and fly...period...There I've said it...! And happy to have...! Building AND flying an aeroplane will enhance your flying safely, that is a proven FACT...! So go out there and support your local EAA Chapter...!
@RV4aviator10 ай бұрын
Thanks Mike.. nice educational content.. Well done.
@MishMashMoto10 ай бұрын
Good video, great example of where and what happens to airflow during a stall. 👍🏼
@asho173510 ай бұрын
i would probably have a mini heart attack while trying to come out from this sort of unusual attitude, and my calm narrative of what the airplane is doing would be "oh sh^t!" 😂
@brentdavidson110 ай бұрын
Thx! We need this video in trainers like c172's too. Especially in light of the sad loss of Richard Mcspadden in likely accelerated stall last Sunday...
@RV4aviator10 ай бұрын
Thanks Mike. I have nearly finished installing an AI with AoA capability, as well as a smoke system, so ...looking forward to testing them in my -4. Great production and info..! Cheers..! Soft skies , hard ground.
@maxmirot946010 ай бұрын
Nice demonstration. Next time you do calibration show us how the 2 methods work with full flaps!! No flaps cal is easy
@rossmiller974011 ай бұрын
Thanks for sharing this Mike!
@maxmirot946011 ай бұрын
How well does this technique work with flaps down ? Never see you calibrate flaps.
@mikevaccaro124811 ай бұрын
Hey Max, Great question. Just trying to baseline Flaps 0 so we can run a transient response analysis on the IMU-based calibration for now...engineering in progress :)
@jimstoops579211 ай бұрын
I want one of these devices. My Garmin does not work at all. I have calibrated it 18 times and it gives me different or no quidance at all.