Pictured is a 750 gallon tank and the concord had a fuel capacity of 31,500 gallons. Thats he equivalent of 42 of these tanks

Pictured is a 750 gallon tank and the concord had a fuel capacity of 31,500 gallons. Thats he equivalent of 42 of these tanks

At least this picture explains that oddly shaped hole in the middle: It’s the place for the main landing gear to fold in.