V tail flutter (cam: Flycamone2)

[NicSchumi]

Just evil ;-)

[azezrtyuuiopqsdfghjk]

use carbon and flutter is gone

[wasserreicher]

that gives boost like a fin xD

[MrZeddy100]

Flapped like a bird!

[MrCrash1956]

eeeek



[wrh61]

kinda low ot be testing that stuff for me

[catamaranman333]

Wow!

[TheMiseryGuts]

Sweet. Caused by the aerodynamic loading exciting a natural frequency of the tail section. I did a thesis on in aeronautical engineering. Most REAL planes will obviously come apart when this happens (need to slow down immediately and change the frequency excitement).

Put a Zaggy Wing in a steep dive with a large brushless motor and at around 100 kts you will hear it make a terrible noise (like a giant humming bird). If you don't back off, it's good night nurse. Will scare your neighbors...

[deliveryman101]

Inexpensive cams do strange things to high speed movement...

Each frame is built one dot after the other, line by line - each frame.

The tail does flutter - but in one piece and not in itself - and not as much as visible in the vid.

Just have a look at some vids with a rotating prop...

Do the same vid with a high speed cam and you'll sigh ;-)

[john1966elliott]

I'm not sure, I think it caused from G 9 ( Gravity ) sharp round. maybe. I don't know.

[vas667]

wxcessive tail flutter.............

[didier309]

if this was a wooden airplane???? omg !!!!

[nicklking]

id have shit a brick

[driftability]

Looks like an rc plane

[horizonflyer9]

it is

[PineValleyDigital]

Oh S***!  Insane!

[goweb172]

mental!

[Xunkun]

Ha ha, wow, that's be freaky to see out the window...

[H65]

You are right EyeFlyHP, it was a flutter caused by the rear part of the fuselage twisting.

[EyeFlyHP]

However if it was only a camera effect I don't suspect that you would be able to see the hinge lines moving. Distortion will change the shape of an image, not the perspective angle of it. I would have to say that is actual flutter.

[krbosak]

When using flycam one low-quality camera, even your landing gear will 'flutter'

[H65]

Correct, hence the pencil between fingers similie. The clip is on Youtube as a form of entertainment, not a scientific study and the Flycamone2 has the same effect on vision as does LSD. It's moot now, the Brisk is no more, see my 'Side by side...' clip for the last moments.

[420choky]

@H65 it looked normal to me on LSD  hahaha

[krbosak]

Relax, people, Flycam One produces such effects. This is more about camera vibration than tail vibration.

[intuix]

Wow, what a video!

[aerospacenews]

that amazing video should be shown to aeronautical engineering students - wow! their movement is real - you are saying the visual perception of it is distorted by the video camera's frame rate if i understand you.

[polydesign]

wawooo.

[Krad89]

Awesome!

[saito125]

Super video!

[H65]

Glad you like it, more to come.

[H65]

Thanks, check out the nose cam on my ASH26.

[Modoproduce]

Is the turbulence on the V-tail caused by the gap between the Flap and the fuselage? After you

pulled up it became less turbulent. why did the V-tail not disintegrate? It has to be glass not carbon?

[H65]

The v-tail had a tiny amount of play, less than 0.5mm, but enough to allow oscillation at high speed. I have since rectified this. Yes, pulling up and thus slowing down stopped it. The tail is off an FVK K2, not the original Brisk one and it is obechi/foam. It didn't really wobble, that is just how the camera reads the movement, hence the pencil between fingers trick. Thanks for your interest.

[plmsdevelopments]

Nice work. What software did you use to do the slo-mo section ?

I've had this happen with one of my models BTW. It didn't survive the flutter.

[H65]

I use iMovie on a MacBook Pro. Sorry to hear you lost a plane, but if I know modellers you'll have had another one made and in the air pretty soon afterwards. Cheers.

[gift2thecokpit]

Wauw, luckily it's a model.

Looks fantastic, perfect demonstration!