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 called "the flying banana", it was a multi-mission helicopter, capable …

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 number 53-4326 served as a USAF Arctic rescue helicopter accommodating 22 troops or …

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 pictures. The global defense reference actively compiled since 2003

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 SAR role, where it performed well in the Arctic environment. 168 H-21Bs were delivered.

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UH is the flagship institution of the University of Houston System (UH System). It has additional instructional sites located in Sugar Land and Katy. The University of Houston–Clear Lake (UHCL), the University of Houston–Downtown (UHD), and the University of Houston–Victoria (UHV) are separate universities; they are not instructional ...

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直升机成为美军标志性代表形象出现媒体的新闻图片中。 XH-40為UH-1的原型機。 韓戰 期間，直升機的運用與需求日益增長。 1952年美國陸軍提出一項直升機需求，以取代當時操作中的機種—對美軍來講服役中的直升機要不太大、要不動力輸出不足、要不過於複雜妥善不易。 在1953年11 …

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，也就是日後的ah-1z奎蛇和uh-1y毒液機型。