This provision is more difficult for many reasons:
-long shaft (torsional vibration)
-less space available for the propeller (bad performance)
-less leverage for VS
-least as a lever to the HS
Facing these problems, which are the benefits?
Greetings Day
I want to build a gyro with HS and VS before propeller, the fuselage will be more clean than that after propeller, I think. Did anyone build that gyro? Would anybody give me view about this idea?
Thanks
Regards
Edward
For another variation, look up the old Avian 2/180 (a Canadian design that was certified Standard Airworthiness in the U.S. but didn't go into production).
It had a duct around the prop.
Edward - the critical parameter for a stabilizer design is the stabilizer "volume". The stabilizer volume is the area of the airfoil, multiplied by it's distance from the aircraft CG. The effectiveness of a stabilizer is directly proportional to it's volume. The damping provided by a stabilizer is directly proportional to the square of it's distance from the CG, or it's volume, multiplied by the distance from the CG.
The effectiveness of the stabilizer/control surface may be boosted by placing it inside the prop wash, but provisions must be made for the certain eventuality of engine failure at every corner of the flight envelope.
Udi