The document discusses different types of aircraft engines including reciprocating, rotary, and reaction engines. Reciprocating engines include inline, V-type, opposed, and radial configurations. Reaction engines include turboprops, turboshafts, propfans, electric, turbojets, turbofans, pulsejets, ramjets, scramjets, and rockets. Jet engines operate by compressing air which is mixed with fuel, ignited in the combustion chamber, and the expanding gases power a turbine which drives the compressor while thrust is produced by exhaust through a nozzle.