Helicopters
Helicopters are the fastest mode of transport in the game, and the most direct and versitile. They do not despawn.
How to Obtain
They can either be crafted or found in a Military Base. Helicopters can be destroyed like a boat and picked up and placed in the inventory.
They use coal as fuel. Do not use coal blocks, as it is bugged.
Military Helicopters
Military Helicopters are found in military bases in the wasteland, their design consists of stripped dead log, and are equipped with a Furnace Engine (along with 18 blocks of coal), Seats, Plane Armor and the shooter module (along with 7 missiles).
How to Fly
Use the up arrow key to increase throttle, then press space to go up. Use WS to control foward and backwards pitch. Use left and right arrow keys to steer. These keybinds can be changed for easier flying under the "Simple Planes" section.
Using WASD to steer with the arrow keys for throttle is the recommended way to fly.