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Original Text (Annotation: EAW017480 / 2050841)
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Two of the first three prototype Bristol Sycamore helicopters.
Per Wikipedia:
'On 25 July 1947, the first prototype, VL958, which was powered by a 450-horsepower (340 kW) Pratt & Whitney Wasp Junior (there being no suitable engine in the Bristol range), performed the type's maiden flight... In mid-1948, the third prototype... built to the improved Sycamore Mk.2 standard, was completed; ... fitted with a 550-horsepower (410 kW) Alvis Leonides engine ... (which) would become the standard powerplant for all subsequent Sycamore production.'
The Sycamore was ...'the first British helicopter to receive a certificate of airworthiness, as well as being the first British-designed helicopter to be introduced by and to serve with the Royal Air Force (RAF).' '
