Hence there was no need for outer cells to compensate wing flatter. The wing root structure is more substantial when compared to shorter versions. This required a reinforced wing due to higher weight of the fuselage. The A321 (being the largest A320 family member) was designed to carry much higher weights while keeping the same wing. & Flight Levels.Ī321 does not require this feature, and only has a single tank in each wing. This was designed to reduce wing tip flutter at some high Mach Nos. It remains there in cruise until the Inner tank reaches 750kgs, the transfer valves then open allowing this OUTER fuel into the INNER tanks. The OUTER wing tanks on A320 hold only 690kg of fuel. The wing tanks on #A320 are divided into inner and outer wing tanks.Īs the fuel from inner wing fuel tanks is consumed and reaches around 750kgs, a transfer occurs and the fuel is transferred from the outer wing tanks using gravity. The A321’s rather simple design fuel system has just 1 wing tank, without needing complex systems. With both Outer and Inner tanks, similar to those found in much larger airplanes. The A320 has a rather complex fuel system. The #A320 Family has different fuel systems for the A318/319/320 and for the A321.
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