0913

Item 0913

DESIGN ~ Electrotor-SloMo ~ Control Flight - Weight Shift - Overview

Notes:

Consider torquing the principal assembly about its lateral axis to cause yaw control.

Pitch:

Roll:

Yaw:

The attempt to twist the rotor frame by applying unequal forces and vectors by the pilot's left and right arms may be difficult for the pilot in that at the same time he is also controlling pitch and roll. Should this be the case, then consider Yaw control by the uses of a thumb rheostat that is 3-wire and spring centering. This rheostat would operate an electrical device that twisted the rotor frame CW and CCW by a few degrees. The mechanism should be such that the yaw détentes to center if the pilot releases the control or it electrically fails. Concern; since there is no mechanical holding of the yaw (twist) position pitch and roll forces by the pilot may disturb the yaw's setting.

An option might be that of using a bicycle brake lever. This is a source. It might be better if the Auxiliary ("Cross", "Interrupter") lever http://sheldonbrown.com/harris/brake-levers-drop.html#cross because they should have more travel. A problem of the bicycle brake leaver is that it only applies a force in one direction (of rotation.)

Collective:

Autorotation:

Autorotation & Synchronization: Could the two motors during autorotation act as motors/generators if the motors and controllers worked but their was a loss of the power supplies?

Information Related to Remote Control - For R & D Testing:

Large Servos: Copied from A143.html

From Rick; http://www.vantec.com/ssps105.htm. For collective, by switch on cyclic grip?

Consider a 'Limited Angle Torque Motor' as an alternative to an electric linear device.

http://www.electricmotors.machinedesign.com/guiEdits/Content/bdeee3/bdeee3_4.aspx

http://www.h2wtech.com/latmotors.htm

http://machinedesign.com/BasicsOfDesignEngineeringItem/714/65783/LimitedAngleTorqueMotors.aspx Have hard copy.

They may not be strong enough. Perhaps if they were used with a high ratio worm and wheel. A 15:1 ratio will decrease the angular displacement by 15 and increase the torque by 15. IE <180º will be <12º, which should be enough.

Links:

See; Cyclic Control for a Simple Ultralight Helicopter and

Electrotor-SloMo ~ Rotor - Blade and

MAKE: Electrotor-MicroLite - Rotor - Disk - Location of Gimbal

Last Revised: July 3, 2010