Pulsed detonation engine

The engine has a cylindrical fire tube (2) and a transversal base (3) that is lodged in adjustment with an interior of the fire tube. The transversal base delimits a combustion chamber with a lateral wall of the tube. The base is movably mounted with respect to the tube and can be displaced between two distinct threshold positions in which the combustion chamber and a supply device (6) are isolated or connected. The lateral wall of the tube includes inlet openings for allowing combustible fuel, from the supply device, into the combustion chamber. The transversal base is integrated with the tube by a locking unit.