Check the listing for details. VTG Thermo-Jet Pulse Jet Engine Inventor Documentation & Information, no engine. Condition: Used. Listed at 30.00 USD. This listing is for documentation/information pertaining to vintage Thermo-Jet pulse jet engines. My father (John A. Melenric) was the inventor/patent holder on these engines, which were used for industrial heaters, jet boosters for sailplanes, jet engines for small model airplanes, and heaters for orchard frost protection. Only a sampling of the documentation is being shown here. Included are 39 pages, with diagrams and explanation of working parts, patent information, engine specifications, jet propulsion concepts, and some miscellaneous advertising. The engine concept was originally developed in the early 1950s and most of the engines were produced and sold in the 1960s and 70s. You will be receiving copies of the documentation, not the originals.