Very impressive ID on the Mooney Mr Humphrey.
Your chopper - the Sikorsky R-6?
Thank you Mr. Graeme. Yes you are correct it is the Sikorsky R-6 Helicopter. James you are also correct as this one is located at the USAF Museum at Wright Patterson Air Force Base. Your example at your museum is also very nice.
The Sikorsky R-6:
Is an American light two-seat helicopter of the 1940s. In Royal Air Force and Royal Navy service, it was named the Hoverfly II. The R-6/Hoverfly II was developed to improve on the successful Sikorsky R-4. In order to enhance performance, a completely new streamlined fuselage was designed and the boom carrying the tail rotor was lengthened and straightened. The main rotor and transmission system of the R-4 were retained. Sikorsky allotted their Model 49 designation to the new design. Later, dynamically-balanced modifications to the rotor were carried out by Doman Helicopters Inc. The new aircraft could attain 100 mph compared with 82 mph by the earlier design.
The first R-6s were delivered to the United States Army Air Forces (USAAF) in late 1944 and some were transferred to the United States Navy (USN). It was initially intended to pass 150 R-6s to the Royal Air Force (RAF), but delays caused by the switch of production from Sikorsky's factory at Stratford, Connecticut to Nash-Kelvinator at Detroit Michigan meant that only 27 R-6As were actually delivered to the RAF as the Hoverfly II. Fifteen of these were passed on to the Royal Navy's Fleet Air Arm (FAA).
One interesting side note … this aircraft was also the basis for this famous toy helicopter.
Your turn Mr. Graeme