Best pulled through by hand first as starter with trolleyacc might cause damage. A job dreaded by the lads in Khormaksar (Aden) in 1950, it was some job pulling three full rotations of each of the mighty Centaurus in a Brigand. I suppose the Hercules in BOAC's HP Hermes were just as enervating, and I wonder how they pulled over prop blades on the Sunderland?