Advanced Materials for the Design of Lightweight JP5/JP8/DS2 Fueled Engines for Unmanned Aerial Vehicles (UAVs)

The XS-Air engine should provide the highest power density with both diesel and gasoline piston engines, especially in smaller engines in where turbos or blowers are impractical. The XS-Air engine can solve the aviation industry problem of the potential phasing out Av-gas. The spark ignition XS-Air engine should be able to burn pump gas and still generate extreme power densities, due to its two stroke operation, constant boosting pressures, large working stroke, and the reduction of parts and weight of the engine. The SI XS-Air engine is highly boosted during start up and idle and its boost will not change when reaching full rpm. This allows the built in compression ratio to be preset for a low enough final compression ratio to eliminate the necessity of using extremely high octane fuels.