Re: [Flightgear-devel] bo105 rotor animation

[Georg V. <hel...@ar...>]

Melchior FRANZ schrieb:
> * Frederic Bouvier -- Sunday 27 August 2006 11:25:
>   
>> But it seems to me that the wrong blades are moving : when you move the
>> joystick from left to right, forward and backward blades reacts, and
>> vice-versa when you move the joystick longitudinally.
>> The whole rotor should be given a rotation of 90 degree counter
>> clockwise when viewed from above.
>>     
>
> Not really. This was always right (as it is now), but when someone
> on IRC came with the same complaint, I believed him and changed the
> rotor to what you expect. Lately I changed it back after Maik complained.
> The reason why the blade's incidence has to be changed 90 degree sooner
> is that due to inertia it takes a bit until the blades really fully
> twist.
>
> m.
>
>
>   
Rotordisk => like gyroskope => same effects

"Gyroscopic precession is a phenomenon that resists movement when a 
force is applied to any rotating body. The result of the outside force 
will occur approximately 90 degrees later in the plane of rotation. It 
is not exactly 90 degrees later, but that is close enough for what we 
are concerned."

from

http://helicopterflight.net/gyroscopic%20P.htm

Regards
Georg