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