The introduction to Hybrid Technology is written by Bill Colburn, the Co-Inventor of the Urbanski-Colburn Valve for simplified hybrid motor construction. Bill also designed, constructed and tested the first Hypergolic Hybrid Motor in June of 1951.
Bill also built the first N2O Hybrid motor using 2 inch tanks (laboratory demonstration tanks), the fore-runner of the consumer High Power Rocket Motors now supplied by both Aerotech and Hypertech. Bill wrote the first Hybrid Propulsion Manual aimed at the field of Experimental Rocketry. This re-written manual is included as part of the SORAC Hybrid Manual.