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The jump belt was demonstrated by a serviceman in action, but as no financing was forthcoming, there was no further testing. However, it soon became known to the military that engineer Wendell Moore of the Bell Aerosystems company had for several years been carrying out experiments to make a personal jet device.After becoming acquainted with his work, servicemen during August 1960 decided to commission Bell Aerosystems with developing an SRLD.Two small nozzles were affixed to the belt and directed vertically downward. Army Transportation Research Command (TRECOM) determined that personal jet devices could have diverse uses: for reconnaissance, crossing rivers, amphibious landing, accessing steep mountain slopes, overcoming minefields, tactical maneuvering, etc.

In 1958, Garry Burdett and Alexander Bohr, Thiokol Corporation engineers, created a Jump Belt which they named Project Grasshopper.

Thrust was created by high-pressure compressed nitrogen.

The reaction is exothermic, i.e., accompanied by the liberation of much heat (about 2,500 k J/kg [5,800 BTU/lb]), forming in this case a steam-gas mixture at 740 °C [1,360 °F].

This hot gas is used exclusively as the reaction mass and is fed directly to one or more jet nozzles.

However, although the exhaust gases from the peroxide-based engine are very hot, they are still significantly cooler than those generated by alternative propellants.

Using a peroxide-based propellant greatly reduces the risk of a fire/explosion which would cause severe injury to the operator.The main disadvantages of this type of rocket pack are: These circumstances limit the sphere of the application of rocket packs to very spectacular public demonstration flights, i.e., stunts; for example, a flight was arranged in the course of the opening ceremony of the 1984 Summer Olympic Games in Los Angeles, USA.in Romania, and (which was also uninterested) informed the American Embassy of his idea.Powerhouse Rocketbelt pilots include stuntman Kinnie Gibson and Dan Schlund.This is said to be the only company in the world offering a flying and tested rocket belt package.After leaning forward, it was possible with the aid of the jump belt's thrust to run at 45 to 50 km/h (28 to 31 mph). At the start of 1960 Richard Peoples made his first tethered flight with his Aeropack. Within the framework of this concept the administration concluded a big contract with the Aerojet General company in 1959 to research the possibility of designing an SRLD suitable for army purposes.

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