0913

Item 0913

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

Notes:

The 'absolutely' rigid rotors will exert a gyroscopic force to their respective rotorheads, which will attempt to tip the rotorheads at an azimuth that is 90º of rotation after the azimuth of the pilot applied tipping. These two forces are transferred to the frame, which joins the two rotorheads. Since the two rotors are rotating in opposite directions, their gyroscopic precessions are opposed to each other. A strong frame will absorb these two opposing forces.

In addition, the blades of the rotors have low rotational inertia due to their taper, no tip weight, no leading edge weight and light composite construction.

DESIGN: Electrotor-SloMo - Rotor - Disk - Gyroscopic Precession

Diagram:

Pitch Axis (Y-axis):

The Pitch axis will probably be slightly ahead of the Center of thrust. See DESIGN: Electrotor-Simplex ~ Rotor - Hub - Gyrobee Information

______________________

Roll Axis (X-axis):

	Symbol:	Description:
		Datum point ~ Gimbal
		Center of mass
		Center of thrust
		Center of percussion
		Center of Drag - Rotors
		Center of Drag - Fuselage

Range:

Range of pitch = +25 to -25: Range of roll = +29 to - 29.

Pitch:

See: DESIGN ~ Electrotor-SloMo ~ Control Flight - Weight-Shift - Pitch

Consider the action of gyroscopic precession; as mentioned in Yaw, below.

Roll:

See: DESIGN ~ Electrotor-SloMo ~ Control Flight - Weight-Shift - Roll

Consider the action of gyroscopic precession; as mentioned in Yaw, below.

Yaw:

See: DESIGN ~ Electrotor-SloMo ~ Control Flight - Weight-Shift - Yaw

Collective:

See: Electrotor-SloMo - Control Flight - Auto-Collective by Torque-Pitch

Autorotation:

Autorotation & Synchronization: During autorotation, where the autorotation is due to lack of stored energy, could the two motors act as motors/generators?

Thought:

The weight of the pilot may have an effect on the weight-shifting controllability. Perhaps there should be 2 or 3 sizes of blades. This is similar to bicycles where the frame size is varied to suit the height of the rider.

Gimbal Location:

For information go to DESIGN: Electrotor-SloMo - Rotor - Disk - Location of Gimbal

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

DESIGN: Electrotor-SloMo ~ Fuselage - UAV - General

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:

OTHER ~ Flight Dynamics - Rotor Hub - Cyclic Control for a Simple Ultralight Helicopter ~ Weight Shift Hub

Initially displayed: May 11, 2010. ~ Last Revision: November 16, 2011

The above utility invention is openly and publicly disclosed on the Internet to negate an entity from patenting it, to the exclusion of all others whom may wish to use it. ~ Reference patent law 35 U.S.C. 102 A person shall be entitled to a patent unless - (a) the invention was known ... by others in this country, ..., before the invention thereof by the applicant for patent.