Gyro/Heli V -
Control - Power TrainOverview:
Drawing:
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Collective Controlled by Rotor Governor: Additional Information on Governor Even More Information on GovernorMaintain constant 100% (operational) RRPM by varying the collective blade pitch:
A mechanical rotor governor is located at each rotor hub and automatically controls the collective pitch of both blades. This mechanical governor consists of small weights that move outward by centrifugal force. The centrifugal force is created by the rotational speed of the rotor hub. The minimum allowable pitch is that which will be appropriate for autorotation (or less?). The maximum allowable pitch is that which is appropriate for maximum power (or jump takeoff?). The movement of the weights on the governor is in the plane that is normal (at right angles) to the axis of the mast. This arraignment will eliminate changes in G-forces from effecting the governor. Springs hold the weights in and centrifugal force moves them out.
A dampener will be required to stop oscillations etc.
Should governor be mechanical of elsctronic?
Manual Overriding of Governor:
The low limit pitch setting is preset on the ground and cannot be changed by the pilot during flight. The pilot can adjust the upper limit pitch setting in flight. One reason is for: (there may not be a reason)
Roll:
By lateral movement of control stick.
Collective Lever:
Semi - jump take-off:
Should the pilot wish to perform a vertical takeoff, he can override the rotor governor and hold the blade pitches down at their minimal profile drag settings until liftoff. This will cause the blades to have a higher RRPM, and more inertia, at the time of lift off.
Flare During Autorotation Landing:
The pilot has the ability to raise the collective during an engine-out landing. This allow for the very large amount of rotor inertia to be consumed.
Control - Power Train:
Throttle:
Located on control stick. ??Trim tabs:
??
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Last Revised: February 2, 2001