solid fixed pitch rotor blade.
solid fixed pitch rotor blade.
(OP)
Guys im no engineer but i posted to this thread to find a diffinitive answer. im working on a rotor craft idea i really need advice on. im using an r/c helicopter as a basis for my experiment. This is what i plan to do. Now think bout the blade on the stick toy you spin in your hands and let go and it flys. well i want to design a solid rotor blade 38" long with blade cord of 2" tip to tip and rounded tips like the toy heli stick thingy. now ill be making it out of maple and will have a 10 degree fixed pitch. i have to lift a 3lb helicopter and use the tail rotor to steer by varying left right tail movements using an speed control with a electronic gyro combonation. i will use weight in front to produce forward flight which will shift the CG slightly forward to have slight nose down atittude hoping it will still be stable enough to fly. what am i missing....?





RE: solid fixed pitch rotor blade.
If the tail rotor is geared to the main rotor, then its thrust will also be affected by changing engine speed, so you'll have a yaw moment strongly coupled into the lift control.
The moving weight for pitch control might work, but it doesn't give you roll control, so you won't be able to fly sideways or bank or counteract any uncommanded roll.
Natural stability to a limited degree may require that you add dihedral to the main rotor.
Mike Halloran
Pembroke Pines, FL, USA
RE: solid fixed pitch rotor blade.
RE: solid fixed pitch rotor blade.
I suspect you will find that speeding up or slowing the tail rotor for directional and torque reaction control is hopelessly slow. A constant speed with pitch control of the blades or "fenestron" will achieve the necessary reaction time