Gannini made intermittent high frequency pulsejets similar to the German V-1 engines.

--The XP-33-GN-1 model delivered 1,500 lbf. of thrust. The XP-35-GN-1 was intended for subsonic missiles.

-The XP-37-GN-1 model had two versions or dimensions, 7-inch and 11-inch.

-The XPJ-39-GN-1 was 11 inches in diameter and was designed to operate at between Mach 0 and 1, that is, subsonic.

-There is reaction-engine documentation deposited at the Nasm and has been requested, Fot (BG-204995-20) and Doc. (BG-205000-01).

From Appendix A4/6: For the Radioplane drones and targets, pulsejets of this brand were used.

--The ones used on the XQ-1, were the Giannini XPJ39-GN engines

“Radioplanes XQ-1 normal, improved, XQ-1A y YQ-1B”

-The first two with Giannini pulsejet and the last two with the Continental turbojet YJ-69-T-3.