Abstract: A hybrid air mobility system is capable of flying a long distance through effective operation of an engine and batteries. The hybrid air mobility system includes a fuselage configured to supply power to a propeller and electric equipment, the fuselage being provided with a duct including an inlet and an outlet so as to circulate air to the engine and the electric equipment; a deflector rotatably installed at the outlet of the duct so as to convert a discharge direction of exhaust gas generated by the engine and cooling air after cooling the electric equipment; and a controller configured to determine whether or not the engine is driven and to control a rotated position of the deflector depending on an amount of driving of the engine so as to selectively adjust movement of the exhaust gas and the cooling air towards the propeller.

Abstract: A system includes an electronic speed control throttle input from which an anticipated electrical power demand is determined. The system includes a controller that determines a throttle input for a generator in order to satisfy the anticipated electrical power demand. The system includes an electronic speed control throttle output providing a delayed electronic speed control throttle signal.

Abstract: A trainer for teaching the operation of aircraft fuel systems comprised of a fuselage frame portion and fuel tanks mounted to a platform. The trainer utilizes a fuel look-alike with a viscosity below 2.8 cs and a flashpoint above 200.degree. F.

Abstract: A trainer for the fuel system of an aircraft such as a helicopter which has full-scale aircraft and fuel system components for training in the operation and maintenance of the fuel system and which uses a fuel substitute which has a higher flashpoint and does not have the odor of aircraft fuel, but does have the specific gravity, dielectric constant and viscosity of aircraft fuel.

Abstract: A fuel control for a gas turbine engine is operable in a training mode in addition to the conventional automatic and manual back-up modes. In the training mode the manual mode is simulated, with signals commensurate with operator action being delivered to the fuel metering valve actuator, while protection against exceeding the safe operating limits of the engine is provided.

Abstract: A fuel control for a gas turbine engine is operable in a training mode in addition to the conventional automatic and manual back-up modes. In the training mode the manual mode is simulated, with signals commensurate with operator action being delivered to the fuel metering valve actuator, while protection against exceeding the safe operating limits of the engine is provided.