The development of a Lunar Soil Propellant lead to the idea of mixing common earth fuels into liquid oxygen (LOX) to form a monopropellant for use in rocket engines. Such a monopropellant would eliminate half the propellant systems which would save weight and reduce the cost of launch vehicles. Under NASA funding, the company explored a variety of fuels such as kerosene, motor oil, coal, methane, and even ground-up automobile tires. All of the fuels were solid while suspended in the LOX.
The monopropellant was successfully test fired in a small rocket engine without flashback from the combustion chamber to the propellant tank as shown on the right