Ok , so the question is pretty simple, but I am not sure whether what I think is correct or not. so if a say a pulse jet produces a acceleration of 1 m/s2 each pulse and it pulse's 10 times a second then would the total acceleration over a 1 second period be 10 m/s2? if not then how does that work exactly? I think it is correct because the engine produce's a certain of thrust each pulse and after taking into account the the mass of the engine, it produce's 1 m/s2 of acceleration because each pulse produced the same amount of thrust. just for simplicity, I didn't use number's. If you know some calculations that could help then please post. Mods: Sorry if this has been posted before, I didn't see one when I searched.