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May 1958: the collapsible helicopter

Small enough to be carried beneath an aircraft’s wing or on a car’s roof rack the Hiller XROE 1 rotorcycle  — a collapsible singe-seat helicopter — generated great excitement when it was demonstrated in London in 1958.READ ALL ABOUT THE COLLAPSIBLE HELICOPTER HERE

The one-man helicopter, which was originally built for the United States Marine Corps, was demonstrated on various occasions during its visit to the UK, including a Royal Marine exercise at Eastney. ’It is intended that, if the machine is put into production, it would be built by a European firm, but the original engine, an air-cooled, two-stroke Nelson flat-four of 43 h.p., would be retained,’ wrote The Engineer.

The prototype aircraft had an unladen weight of 300 Ib, a maximum rate of climb of 1160ft per minute, and a top speed of 70mph.

The machine was designed to be not only portable but air-droppable, and a special trolley had been developed to support it during and after folding. ’The machine can be stowed and folded without even draining the fuel tank, while there is, of course no engine sump. Assembly involves only the fitting of fourteen self-locking “Pip” pins, and can be performed in about four minutes,’ explained the article.

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