The Republic Thunderbolt. A fantastic plane in its own right. It was heavy, built like a tank, hard to shoot down - but it used two gallons of fuel every minute. It therefore didn't have the range of the Mustang.
The Battle Droid from the Star Wars franchise is a great example of what the enemies our character will face on board the ship he is kept on. There may be larger styles of robot, but in terms of henchmen, Battle Droids are a great comparison.