The Fuelless Engine Testbed or FET is a platform designed for testing the Fuelless Engine's Performance across varying propellor pitch degrees as well as their respective aerofoils. The left side of the testbed was mirrored due to the massive amounts of torque provided by the propellors but ultimately has the same power as the right side. Efficiency and maximum air speed across all altitudes vary greatly when propellor pitch is increased or reduced, the most efficient propellor pitch angle was 40 degrees regarding top speed and acceleration, out of the 3 aerofoils the flat-bottom aerofoil provides the most power and efficiency.

When using this engine, it is required that you mirror it to the other side of your twin-engined aircraft or have it contra-rotated on a regular single engine aircraft. The torque is so extreme that you cannot possibly make a functioning plane with a single engine, this is an issue that cannot be resolved by any means. With that being said, the Fuelless Engine provides Astonishing power and is considerably more lightweight when compared to a regular vanilla engine, With the obvious advantage of not needing fuel whatsoever. There will be a link to an aircraft utilizing these engines below as evidence of their capability. This is open for public use, just remember to give credit

https://www.simpleplanes.com/a/ExHBj4/The-P-38