V tail flutter (cam: Flycamone2)

High speed flutter on the V tail of my BRISK2 3m slope machine during a dive across the slope. The tail planes are stiff and this flapping effect is caused by the camera not reading the flutter speed fast enough. You get the same effect when you hold a pencil loosely between thumb and index finger and wobble it.

Category:

Science & Technology

Tags:

• RC
• glider
• model
• plane
• radio
• control
• aircraft
• slope
• soaring

[H65]

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

[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.

[saito125]

Super video!

[H65]

Glad you like it, more to come.

[H65]

Thanks, check out the nose cam on my ASH26.

[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!

[420choky]

@H65 it looked normal to me on LSD hahaha

[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 ;-)