Aerojet's M-1 was the largest and most powerful liquid hydrogen-fueled liquid fuel rocket engine to be designed and component tested. The M-1 offered a baseline thrust of 6.67 million N (1.5 million lbf) and 8 million N (1.8 million lbf) as its immediate growth target. If built, the M-1 would be larger and more efficient than the famed F-1 that powered the first stage of the Saturn V rocket to the moon.