Description Description The fuel tanks for the SU-27/30 are conformal tanks, which fit tightly into the fuselage under the air brake. They can be serviced through the airbrake opening. The set includes a hopper tank and all plumbing materials. Both tanks have the same volume, so each one is used for one engine. Volume is approx. 3 l per tank, which gives you safe 8 minutes of flying time.