REFLECTOR: Elevator Trim Spring

[michalk]

One of these days when I have more money than sense, I would like to try 
out some of these things.  Of course this would require the services of 
an aeronautical engineer.

It seems to me that a flying canard, or articulating canard would be one 
of the tricks for a really efficient go fast canard airplane.  The other 
trick would be to adjust the winglet angle.

Someone mentioned about the possibility of a deep stall.  I think that 
an articulating wing would be no more prone to a deep stall condition 
than the existing elevator.  The canard stalls at a certain AOA.  If 
it's articulating, it will still stall at the same AOA.  As long as the 
canard is not oversized, then it can't stall after the main wing. 
Anyway, if one were interested in speed, one would reduce the size of 
the canard, moving even farther from the main wing stall.

If the canard were articulating, the dreaded deep stall possibility 
could be eliminated.  There could be an emergency setting that would 
allow it to be rotated 90 degrees down to drop the nose and get the main 
wing flying again.

Andy Millin wrote:
> I suppose you could if you wanted to experiment.
> 
> I'm not an aerodynamic engineer.  Just some thoughts.
> 
> It would make it difficult to seal the doghouse.  Would be cold and windy.
> 
> Would need to find a way to attach and balance the whole canard.  Attach
> points would probably need to go right about where the middle of the spar
> cap is now.  But, you could find a new attach if you wanted to work at it.
> 
> Would be quite a bit of mass to move around with the controls.
> 
> The canard provides a significant amount of the lift.  Small changes in
> incidence would probably translate into large changes in pitch.  Would want
> to have plenty of mechanical advantage to keep it from slamming to the
> stops.
> 
> If you screw it up, you'll probably only get one chance at it.
> 
> Not my cup of tea.
> 
> Andy
>