Yvonne Madelaine Claeys Brill was a Canadian-born American aerospace engineer rocket scientist who pioneered the electrothermal hydrazine thruster. She referred to as it hydrazine resistojet. Resistojet is a method of spacecraft propulsion that supplies thrust by heating a non-reactive fluid. Yvonne Brill patented her propulsion process for satellites in 1972. She gained U.S. For the final 20 several years of her everyday living, Yvonne C.