Still tryi g to figure out the takeoff technique and the inputs i have to apply to keep the darn ship straight!!
At the beginning of the run, cyclic froward to redirect some total lift forward - namely thrust - to induce a forward motion.
As the helicopter accelerates maintain ground path with pedals.
At 10 kts or so transverse flow will cause the front portion of the rotor to move into cleaner more horizontal air, reducing the vertical component of the induced flow, resulting in a greater aoa for the same pitch and thus in a greater lift, than the rear portion of the rotor. Due to gyroscopic precession, the max increase in lift occurs 90 degrees away which translates in a tendency of the helicopter to turn right which must be compensated for by applying left cyclic.
Between 16 to 24 knots the disk will move away from its downwash, the resultant relative wind will become more horizontal, greater aoa for the same pitch, lift increases which reflects in a tendency of the heli to baloon up if nor compensated for by a forward motion of the cyclic.
The tail rotor operates in cleaner air as well, resulting in an increase in side thrust and thus a tendency to yaw to the left which must be compensated for by right pedal.
At 50 kias release the pressure on the cyclic, allowing the helicopter to rotate to 60 kias attitude for the climb, eventually increasing power to takeoff power if any available with respect to hover power, not to exceed limited to power - mcp plus 0.9 for the r22. Apply left pedal to maintain trim.
At 300 ft agl turn crosswind continuing climbing and set mcp from the placard.
50ft prior to tpa apply fwd cyclic to accelerate to 70kias, upon reaching 70kias adjust collective as required - 21"MAP roughly.
Are the above considerations correct or i have the sequence of events messed up?
Bao72,
No disrespect at all but do yourself and others a favour -
Easy reading and the man is a true icon and gent. Very little formula.
Will most definitely answer all your queries above. Get your head around it and you will as expert as most if not more.
Helicopter Aerodynamics #1
by Ray W. Prouty
Helicopter Aerodynamics #2
by Ray W. Prouty
Part with a bit of cash and all will be revealed.
You will get 20 different and possibly incorrect answers here.