纵列双旋翼的另外一个好处是不象其他直升机那样需要一个尾桨来平衡旋翼的扭矩，动力效率高。但也有一些缺点，如两个旋翼必须同步避免互相间的碰撞。而且因为CH-47尺寸较大，加上两个旋转翼展达20米的旋翼，整架飞机起降时影响到的范围达100米。而最大的缺点在于由于旋翼重叠，产生的气流相互干扰，导致较大幅度的功率损失，因此至今也只有少数直升机采用了这一布局。

The CH-47`s maximum airspeed is 185mph which effected by load configuration and circumstance situation. The crew for tactical operations is normally two pilots, one flight engineer and one crew chief.

CH-47的最大速度为298千米/小时，在不同载重和环境条件下略有差别。执行战术行动时机组通常由正副飞行员、一名随机工程师、一名机长共四人组成。

June 25 1958, the US Army issued an invitation for a Medium Transport Helicopter. Five aircrafts of Boeing selected to produce the YCH-1B as the Army`s new medium transport helicopter. In July 1962 the CH-1B was redesignated as the CH-47A. In 1962 the CH-47A was first delivered for use in Vietnam. The Chinook's mission is carrying artillery, ammunition, personnel, and supplies on the battlefield. It also performs rescue, aeromedical, parachuting, aircraft recovery and special operations missions. Early production CH-47A`s operated with the 11th Air Assault Division during 1963. In October the aircraft was formally designated as the Army`s standard medium transport helicopter.

1958年6月25日，美国陆军发布了中型运输直升机的招标书。波音被选定生产定名为YCH-1B的5架直升机作为陆军新型的中型运输直升机。62年7月CH-1B被重新定名为CH-47A，同年首次在越南交付实战使用。“支努干”在战场上的任务是运载炮兵及武器、弹药、人员和后勤物资。它还执行救援、医疗救生、伞降和特种任务。1963年时早期的CH-47A生产型服役于第11空中突击师，同年10月该型号直升机被正式指定为陆军标准中型运输直升机。

June 1965, the 11th Air Assault Division was redesignated as the 1st Cavalry Division (Airmobile) and readied for Vietnam. Chinooks formed the nucleus of the 228th Assault Helicopter Battalion which began operations in Vietnam in September, 1965. At that time CH-47As were equipped with Lycoming T55-L7 engines generating 2650 shp. The aircraft had a maximum gross weight of 33,000 pounds allowing for a maximum payload of approximately 10,000 pounds. But the hot mountainous conditions of fareast cut down the A models` capabilities.

1965年6月，第11空中突击师重编为第1空中骑兵师，开赴越南。“支努干”构成了228突击直升机中队的核心，65年9月开始在越南执行任务。当时的

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