J-20 Jet Engine Plans
Plans for our J-20 Jet Engine. Maximum 25 Lbs thrust, typical 20 Lbs. No moving parts, nothing to wear out - and there is no complicated support equipment such as fuel & oil
pumps, electronic control systems or radiators found on turbine engines, or reed valves that wear out & frequently break found on pulsejet engines.
At the present time, we do not sell completed J-20 engines or
parts, but we do sell the plans.
The plans are large 1:1 scale drawings (over 8 feet long). The engines are fabricated from just sheet metal and tubing. If you are good at with metalworking &
fabrication (cutting, welding, forming) you can build this engine. The
plans can simply be placed right on top of your sheet metal and the parts traced & cut 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 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
J-130 on a Go-Kart
See the youTube video: Here
Bob in 1979 with a J-20 on his
Engine Plans: $19.00