RAK402
Veteran
Location: Alhambra, CA
| You probably will not be able to get full through with the mixers leveled at half stick (i.e. halfway through the swashplate travel).
Hirobo instructions showed the mixers at slightly above level at full pitch (which, if memory serves, was about 9 degrees). The levers, at full low pitch, should be well below horizontal.
Full low pitch was at -3 degrees.
This was before computer radios, and both throttle and collective were set with very heavy and opposite differential throw (i.e. the ball on the servo arm was offset): The pitch moved very rapidly from low stick, then tapered off. The throttle moved slowly from low stick, then more rapidly as the stick reached full throw.
Some people did not understand or disregarded this in the instructions and were greeted with some truly spectacular overspeeding.
All of this should be able to be accomplished with a modern computer radio.
If you need to deviate from the mixing lever positions cited above, just make sure that there is no binding at full high or full low pitch and extreme cyclic.
The two long pushrods going to the head should be absolutely identical in length. Pitch changes should be done by adjusting the short links between the Bell/Hiller mixers and the blade grips.
The long links stay the same length to prevent differential throw at the Bell/Hiller mixers. |
