The engine of Bristol Sycamore Mk.3 A91-1 has been run for the first time in around 25 years. The helicopter is with the Moorabin Air Museum in Melbourne, Australia. The helicopter was acquired by the museum in 1967, after it was wrecked in an accident. It has been fully restored, and the video shows the Alvis Leonides engine being turned over in January 2014.
The Sycamore was delivered to the Royal Australian Air Force in 1951 in the hold of a Bristol Freighter. It was disposed of in 1965, and operated as a heavy lifting vehicle as VH-GYR in Victoria until its accident. The museum's Bristol Freighter has also been undergoing some TLC, including the fitting of its flying surfaces. More information can be found on their Facebook page.