 Tom Steele was the second stuntman in the rocket pack and helmet, and Dale Van Sickel took the role when Steele and Sharpe were unavailable or were being used in the same stunt shot.The first appearance of Rocket Man (Dave Sharpe) has him flying directly into the back of a fast-moving, tarp-covered truck, driven by stuntman Tom Steele, then getting into a fist-fight with Vulcan's henchmen; in that same fight sequence Tom Steele is also the stuntman in the Rocket Man costume.Several shots in the serial feature the Rocket Man character flying across broad vistas of barren landscape, an effect achieved by Howard and Theodore Lydecker running a full-sized dummy on internal pulleys along a very long, taut wire tilted at an downward angle to the horizontal.