Re: First Flight

[McFadyean <ami@mcfadyean.freeserve.co.uk>]

I've found on the fixed TD that raising the tail too early leaves insufficient
rudder authority when there's a crosswind from the left.
This is inconsistent with the size/expected power of the large rudder.
I have no explanation.

Duncan McFadyean

On Monday, August 12, 2002 12:04 PM, Graham Singleton 
[SMTP:grasingleton@avnet.co.uk]
wrote:
> >I have authority at running pace. Initially I expected to have to use my
> >differential brakes for a little while in the acceleration but that's not
> >the case. Amazing how the tundra tyre must be so sticky to the floor that it
> >stops the planes rudder working. Or am I missing something?
> >Kev T
> 
> I found the same. My own guess is that it might be something to do with the 
> gyroscopic effects of the prop. If you rotate onto the main wheel only the 
> plane tends to rock from one O/R to the other. This could cause yaw due to 
> precession effects, which then causes pitch due to precession effects and 
> in general makes the whole situation more difficult to predict and control.
> Just armchair guesswork.
> Graham
> 
>