A pulsejet engine works by alternately accelerating a contained mass of air rearward and then breathing in a fresh mass of air to replace it. The energy to accelerate the air mass is provided by the deflagration of fuel mixed thoroughly into the newly acquired fresh air mass.

What is the purpose of a pulse jet?

A pulsejet is a simple form of an air breathing jet engine that has few or no moving parts. The pulsejet acts in cycles, or pulses, where air is drawn into a combustion chamber, mixed with fuel, ignited, and then accelerated out of a nozzle providing thrust.

What fuel does a pulse jet use?

Pulsejets can run on gasoline, diesel fuel, and kerosene. Gasoline is in practice a better fuel choice for PJs, because of its relatively narrow range of flammability, i.e., will flame out (blow out) if the fuel–air mixture is too lean or too rich in the combustor.