If you purchase a bundle with an aircraft that you already have, you will receive the remaining items from the bundle (gold) except the Hangar slot, the crew, and the aircraft itself. Instead, you will be compensated with the following amount of gold:
1,040 for the Boeing YP-29 (740for the aircraft + 300for the Hangar slot)
1,100 for the Supermarine Type 224 (800for the aircraft + 300for the Hangar slot)
4,100 for the Ilyushin IL-1 (3,800for the aircraft + 300for the Hangar slot)
Reference to a particular make, model, manufacturer, and/or version of aircraft is for historical accuracy only, and does not indicate any sponsorship or endorsement of any trademark owner whatsoever. All aircraft models are designed to have flight characteristics and some elements of artistic design realistically replicating World War II era aircraft. All aircraft trademarks and trademark rights are the exclusive property of their respective owners.