Hello, so today i was thinking about alternative ways to provide electricity to a motor in a fixed wing aircraft. Ideas: 1. Use thermoelectrics. They would generate the most voltage around the engine, so maybe they would only be placed here, or all over the aircraft. Advantage: unlike solar power, thermoelectics generate electrical energy from a temperature gradient. The outside of an airplane is often cold at high altitudes, and the motor is hot. They are not dependent on sunlight energy. 2. Motor-generator cycle. The back of the driver shaft from the propulsion motor would be connected to a generator, which would produce energy to charge capacitors that would then power the motor. I'm not sure that weight of this generator can be justified by it's energy production. A demonstration of idea 2 can be found here So what do you think? Are these ideas feasible? Also 1st post on this forum :) hello everyone. not sure if this should be in electrical engineering.