Small, Heavy Fuel, Compression Ignition Small UAV Engines

"The ThinGap TM Motors are brush and brushless ironless core, hollow stator / armature motors that exhibits extraordinary power output in a small package. The coils are constructed of non-magnetic, high temperature materials. No magnet wire or ironlaminations are associated with the stator / armature. The freestanding structure of the motor coil has no supporting substrate and is virtually invisible to the magnetic field. Heat in the coil is readily dissipated with air moving over both the insideand outside of the coil. High electrical efficiency is achieved with the BLDC Stator Coil exhibiting over 90% efficiency. Cogging is eliminated. The back emf waveform is a sine wave. The thin wall of the Stator Coil allows a very narrow magnetic gap butwith high copper packing density in the magnetic field. The coil has very low phase-to-phase resistance and inductance. The manufacturing precision creates an insignificant 0.3% variation of phase-to-phase resistance. Extremely high peak power isobtainable. The higher torque capability combined with the high inertia rotor offers the opportunity to eliminate expensive gearboxes. ThinGap rotor inertia is 5 to 10 times higher than competitive motors with rotor mass approximately 85% of total motormass. Applications requiring a hollow motor, such as unmanned flying and land vehicles Any application requiring a lightweight ultra-efficient DC motor (e.g. RC airplanes, power hand tools, medical devise