Rocketeer

In 1938 Los Angeles, California, a rocket pack is stolen from Howard Hughes by two members of mobster Eddie Valentine's gang. Hotly pursued by FBI agents to an airfield, one gangster is killed, but the injured driver is caught. Stunt pilot Cliff Secord and mechanic A. "Peevy" Peabody, whose Gee Bee racer was irreparably damaged by the mobsters, find the mysterious rocket inside a biplane of their employer's hangar, where the getaway driver hid it. Cliff and Peevy test with the rocket for a little while, but Peevy cautions Cliff about the dangers involved. Meanwhile, Eddie argues with movie star Neville Sinclair, who had secretly hired the Valentine gang to obtain the rocket from its maker, Howard Hughes. Sinclair sends his monstrous henchman, Lothar, to the hospital, where the injured getaway driver tells him that he hid the rocket at the airfield. Lothar then kills him, and Sinclair negotiates a new deal and dispatches the mobsters to search for the missing device.