Several metals are used in the construction of the airframe: 60% aluminium, 19% steel, 13.5% titanium, 2% magnesium alloy and 5.5% other materials.
U izradi se koristilo više različitih metala: 60% aluminij, 19% čelik, 13.5 titanij, 2% magnezijeve legure i 5,5 % ostalih materijala.