Small aviation engines, also known as small aircraft engines or light aircraft engines, have a wide range of applications due to their compact size, reliability, and efficiency. Here are the main uses:

1. General Aviation & Personal Aircraft

Powering light sport aircraft (LSA), training planes, and private single/twin-engine planes.

Used in ultralight aircraft and microlights for recreational flying.

2. Unmanned Aerial Vehicles (UAVs) & Drones

Essential for military drones (reconnaissance, surveillance).

Used in commercial drones (agricultural spraying, cargo delivery, aerial photography).

3. Experimental & Homebuilt Aircraft

Popular in kit planes and amateur-built aircraft due to their affordability and ease of maintenance.

4. Auxiliary Power & Specialized Uses

Serve as APUs (Auxiliary Power Units) in larger aircraft.

Used in gliders (for sustainer engines) and airships.

Power military target drones and missile propulsion systems.

These engines are typically piston-based, though some advanced models use small turboprops or turbojets, depending on performance needs. Their versatility makes them crucial in both civilian and military aviation sectors.