Engine

The engine is one of the most important part of any aircraft. It allows them to fly through the air. Both the Avro Lancaster and Boeing B-17 have quadruple engines. There's no way to stop the engines unless broken.

You only need one engine to be able to fly it controllably.

Requires: Fuel

Causes of Engine Failures

 * Too much damage from enemy fire
 * Low Fuel
 * Engine Fire