In 1965, through the entire Vietnam war, the outstanding load ability linked to the CH-47 Chinook led the U.S. Army to request a greatly armed version to present assistance for the AH-1 Cobra. The initial journey occurred on 6th November of the same 12 months and, in-may 1966, four kinds of these heavy Chinooks, assigned on first Air Cavalry Division, were stationed through the An Khe base for trials. Because of heavy armaments, including a 40 mm XM-5 grenade launcher, two 20 mm M-24 cannon, five 12.7 mm M-2 machine firearms and two hook-up points for rocket launchers or other loads-plus heavy armour to shield both team and helicopterthe ACH-47 proved impressive in a ground troop help part. Nonetheless, because of the complexity from the aircraft together with pushing requirement of transport variants of this Chinook, the U.S. Army halted more development.
