I am looking the possibility of staying with full winglet and
small mid
fuselage fin , to increase the yaw control i will built each side
of the
nose some flaps who will be interconnected between each winglet rudder
you see what i means similar to the gas door on car but much
bigger by
cutting part of the nose each side and lay inner skin and separated
with tape to prevent stikking together.


Jean Prudhomme


Jean, if I'm reading this correctly, your putting "airbrake" type flaps on the sides of the fuse
for yaw control? I think this would be a big negative for several reasons.

1- disrupted flow over the wing, and now the prop.
2-Having the 'flap' infront of the CG could have an un-stabling effect.
3- Drag for yaw control to counter single engine operations is just .. not
good [you can NEVER have too much thrust during single engine operations] IMO.

Had to put doing the FEA off over the weekend.. but I'm back on it here today.. :)

J. Johnson


Thank,s for your comments on this subject but i do have some alternative by
the central fin rudder.

If i loose one engine the opposite flap can be operated with a linear
actuator without been in relation with rudder operation.

I really dont know how much it can affect the wing airflow because
it will be located below the wing airfoil cord and strake cord
also below the canard


Jean Prudhomme