Michel,
>From an aerodynamic perspective then increasing the flap angle will
substantially increase the pitching moment and you will undoubtedly find
that you run out of tail authority.
Essentially with an increased pitching moment the horizontal tail needs to
do more work to balance it. At lower speeds it will actually provide less
work and therefore you could find yourself in a very steep descent that
close to the ground will not be recoverable.
My advice would be to stay clear of this.
To slow the aircraft further you could experiment with vortex generators on
the upper surface of the wing which is something that Bud Yerly has been
looking at with some folks in California. With VG's the pitching moment is
not so much impacted but the underpowered horizontal tail is still there.
Then VG's would be needed on the horizontal tail to counter this to prevent
it from stalling. In other words it is not an easy thing to do.
Dave Stanbridge
Europa Aircraft
On Jun 9, 2009, at 10:16, Michel AUVRAY wrote:
>
> Hello all,
> Is there a flap manual command on the three gear?
>
> I search a solution to reduce speed approach by increasing flap > position
on the monowheel. ; > 0
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