DESIGN: Electrotor-Plus ~ MRGA

• Consider locating a fixed azimuth hub-spring under the scissors assembly. The scissors and hub-spring could then be located at an azimuth that on an;
• Intermeshing configuration, resist the possibility of a blade making contact with the other rotor's hub.
• Interleaving configuration, minimize the downwash on the pilot.
• If the mast and the planet holder do not rotate, which appears to be the case on all arraignments, the hub spring is not rotating, This means that the hub spring can serve as both fixed and 'so-called' rotating.
• It can have different resistance to tipping at different azimuths. A example is the application of stronger resistance near 270º azimuth, as a means of assuring that the blades on both rotors close on each other at the correct elevations in respect to each other.

• Re component failure. For now see; Concerns & Tasks

• There may have to be fixed position moment rods at 90º to the moving control rods. These fixed rots or some other means may be necessary to assure that the plane of the gyro is returned to being normal with the mast (and co-planner with the rotor disk) when the blades are midway between their maximum positive and maximum negative teeter. Otherwise the first teeter might set the gyro position and then it might not move further during the rotation of the teetering rotor.

• Axial Flux ~
• Radial Flux ~
• Angular Momentum:
• Angular Momentum = rotational inertia x rotational velocity = J_Mω
• Value for hollow cylinder: J_{M =} ¹/₂m(R² + r²) ~ R is the outside radius of the cylinder. r is the inside radius.
• Value for disk with mass (m) considered as being concentrated at the radius (r). J_{M =} m * r²
• The stators coils should have a good length to 'return radius' ratio. This suggests that a motor with long coils and high speed might be best.
• The square of the radius is used in the algorithm and this suggests that a large diameter, slower rotor (with resulting short coils) might be best.

• The very high-speed motor is as designed in this craft. An external ring of permanent magnets is linked to the aero-rotorhub. This ring encircles the permanent magnets of the outrunner electric motor. Varying the air gap between the two rings (sets) of magnets will vary the amount of torque that is transmitted from the motor's permanent magnets to the aero-rotor's permanent magnets.

• Magnomatics

• Magnets offer advantages as an alternative to mechanical gears
• What is the efficiency of this type of variable drive transmission, and does it continuously consume electrical power?
• If electric propulsion improves over the years then the propeller and the rotors can vary their speeds by having separate motors.

• Concerns:
• How are the two rotors safely and firmly synchronized.?
• It appears that the motor may not be able to act as generator; for rotor braking and generating limited electrical power for use during autorotative landing.)

• The location of all masses, with the exception of the motor's rotor and the aerodynamic rotor, need not be centered on the gimbal. This is because the movement of these masses is no very frequent. The motor's rotor and the aerodynamic rotor (centers of lift, drag, centrifugal force, percussion) must be centered on the gimbal.

• Consider vanes in the rotor's disk (ring gear) that drives air up into the reducer area, past the coils and out through the gap between the coils and the magnets.

• This section relates to proximity of the gear(s) to the magnetic flux of the motor and the detrimental effect the gear(s) have on the efficiency of the motor.
• Not sure yet what I am actually looking for
• Could the ring gear be made of another material, such as brass, or perhaps non-metallic, that will minimize this perceived problem?

• Use precision bearings for high-speed applications.

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