pulsejet engine

or pulse-jet engine

[puhls-jet]
noun Aeronautics.
  1. a jet engine equipped with valves that continuously open to admit air, then close during combustion, giving a pulsating thrust: used to power the V-1, a German buzz bomb, in World War II.

Origin of pulsejet engine

First recorded in 1945–50; pulse1 + jet1
Also called pulse·jet, pulse-jet, aeropulse.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018