Jet Engines and Rockets
Jet Engines & Rockets
We currently offer 2 different sets of Jet Engine Plans, our J-20 (22 pounds maximum thrust) &
our J-130 (150 pounds maximum thrust) plans. These Jet Engines are considerably different than jet turbine engines or pulsejets. Our jet engines have no moving parts whatsoever.
There is nothing to wear out - no reed valves that wear & break like those used on pulsejet engines and no complicated support equipment (fuel & oil pumps, bearings, or radiators) used on turbine engines.
They are known as 'Pressure Jet Engines' and have also been called 'Static Ramjet Engines" (because they produce power statically (when they are stationary) where true Ramjet engines only produce power only when moving at very high speed).
J-130 Jet Engine on a Go-Kart and Bob in 1979 with a J-20 Jet Engine on his bicycle
At the present time, we do not sell J-20 or J-130 engines or parts, only the plans.
The plans for the J-20 & J-130 are large, 1:1 scale drawings (over 16 feet long for the J-130 and over 8 feet long for the J-20). The engines are fabricated from just sheet metal and tubing.
If you are good at with metalworking & fabrication (cutting, welding, forming) you can build these engines. Being 1:1, full size drawings, these plans can simply be placed on top of your sheet metal and the parts cut right out. It is a great metal shop project for the more advanced hobbyist.
The original engine & designs were produced by a close friend of Bob Lazar's, Eugene Gulhareff. Until his death, Eugene built & sold his engine for decades and met Bob in the late 1970s. Bob occasionally worked with Eugene building engines and also sold plans with some minor modifications he incorporated for Go-Kart & small vehicle use at car shows and race events.
These plans incorporate the performance changes Bob made back then and the engines actually put out about 15% more thrust than advertised. The J-20 & J-130 engines are controlled by a simple ball valve regulating propane flow to the engine which allows them to throttle from idle (essentially zero thrust) to 100%. The engine does get red hot during operation so it cannot be built into an enclosed area unless copious amounts of ventilation are provided.