Some bombers can launch in a formation, there are 3 planes in total, you control the middle one. The others will follow you but only to a limit. If you maneuver too hard they will lag behind. If they lag behind too far, they are destroyed and explode. Basically, you need to be gentle and make wide, sweeping, turns.
The bomber will drop their bombs on your drop, they will also shoot at what you shoot at from defensive guns. It is possible to have someone else join you and gun from one of the drones to increase your defensive abilities.
btw, you can switch between planes, you have to map a key to do it if you have changed your key mapping. When you switch then it's pretty much the same, you are just in one of the wingman planes.
-Soda
Aces High Trainer Corps
The Assassins.