Re: [Phys-l] unusual areodynamics

[brian whatcott <betwys1@sbcglobal.net>]

The high speed backwards flight is particularly revealing evidence for 
the active attitude stabilization. Maneuvers towards the ground look 
like the operation of  default hands off  stabilization.    I think that 
idea started out as a beginner's aid - "if everything goes pear-shaped, 
just let go", - in stab augmented flight
but got co-opted into stunt flight.

Brian W


On 12/12/2011 8:22 AM, Matt Coia wrote:
> RC helicopters can do some crazy things, too.
>
> http://www.youtube.com/watch?v=XPB19tIQSUo
>
> Matt Coia
>
> On Mon, Dec 12, 2011 at 7:36 AM, brian whatcott <betwys1@sbcglobal.net 
> <mailto:betwys1@sbcglobal.net>> wrote:
>
>     On 12/11/2011 8:46 PM, Aburr@aol.com <mailto:Aburr@aol.com> wrote:
>     >
>     > It  would be interesting to have jsd explain the aerodynamics of
>     this
>     > y0utube  clip
>     > _http://www.youtube.com/watch_popup?v=tzowQtqOM_I_
>     > (http://www.youtube.com/watch_popup?v=tzowQtqOM_I)
>     > Alex. F. Burr
>     > _______________________________________________
>     > Forum for Physics Educators
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>     >
>     Hobbyists are doing some wonderful stunts using modern lightweight
>     clockwork.
>     I can imagine that this example has some useful help from 3 axis
>     accelerometers and  gyro inputs to controls.
>     I find it particularly impressive when an RC helicopter can summon
>     stability in space at hover - hands off!
>
>     Brian W
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