Motive flow refers to the continuous flow of fuel from the aircraft's fuel tank to the engine. It is the force that pushes the fuel through the fuel system and into the engine for combustion.
Motive flow is crucial for the proper functioning of an aircraft's fuel system. It ensures a steady supply of fuel to the engine, which is necessary for the aircraft to maintain its desired speed and altitude during flight.
Motive flow is created by the pressure difference between the fuel tank and the engine. This pressure difference is maintained by the fuel pumps, which generate low pressure at the fuel tank and high pressure at the engine.
Several factors can affect motive flow in an aircraft fuel system, including altitude, air temperature, and engine power. Higher altitudes and lower temperatures can decrease motive flow, while increased engine power can increase it.
If there is a loss of motive flow, the engine may not receive enough fuel to sustain its operation, leading to engine failure. This can be a serious safety concern and can result in an emergency landing. Therefore, proper maintenance and monitoring of motive flow are essential for the safe operation of an aircraft.