Hi guys, I hope this an ok thread to ask .. what model/variant of the Mossie was fitted with a 4 blade prop and why? What difference did it make, if any?
I'm not aware that there were handed engine fitted to Mossies - if there were, please correct me.
Re handing of engines - the Rolls-Royce method was to interpose a spur gear to swing the prop the opposite direction, and yes, the Allison evidently did do it in what was to me a revelation (from an earlier posting in this thread!) Here's a copy/paste lifted from the web.
Another feature of the V-1710 design was the ability to turn the propeller either clockwise, or counter-clockwise, by simply assembling the engine with the crankshaft turned end-for-end, installing an idler gear in the drive train to the supercharger and accessories, and having a starter turning the proper direction. The ignition wiring and firing order were also arranged to accommodate the direction of rotation.