The Piasecki H-21 Workhorse/Shawnee is an American helicopter, the fourth of a line of tandem rotor helicopters designed and built by Piasecki Helicopter (later Boeing Vertol). Commonly …

Considered to be the first heavy lift helicopter, a modified HU-21 made the first nonstop transcontinental helicopter flight on 24 August 1956. The museum’s HU-21B has serial …

2020年3月8日 · Page details technical specifications, development, and operational history of the Piasecki H-21 Workhorse Cargo /Passenger Transport Tandem-Rotor Helicopter including …

US Air Force procurement began with 18 of the YH-21 Work Horse in 1952, which was the first tandem rotor helicopter used by the USAF. 33 H-21As followed and it distinguished itself in the …

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UH-1直升機為多用途設計，其U代表通用（Utility），從運補作業到攻擊任務皆可勝任。 它也是美軍第一款引進 涡轮轴发动机 的直升机。 它的民用版本是 貝爾204/205。 在 越南战争 中UH-1 …

uh-1y毒液（uh-1y venom）是美國uh-1直升機一種升級改型，也稱超級休伊，約84%零件沿用。 [2] 1996年起美國海陸開始了直升機升級專案，100台uh-1n和180台ah-1w被排定升級，也就是 …