Salvaged prop ID

Thanks John, most helpful.
Tony K

For activity around the Isle of Man the best contact is the Manx military Museum and Ivor Ramsden who is a member here. Wellingtons , Hampdens and Blenheim’s all operated out of RAF Jurby. Each type a possible for your propeller.

John

Again, my thanks John and CD for the additional information, it is great to be in touch with the experts!
I have now been told that it was picked up off the Isle Of Man, there was plenty of activity around that part of the world.
regards
Tony K

Tony
I cannot claim to be a technical expert on Bristol engines but the first clue to it’s identity are the round centrifugal weights which are on the left side (as seen). If they were on the right side then they would point to a prop off an American (or RR Merlin) engine. British engines tend to rotate anti clockwise from the pilots viewpoint and US and Continental engines rotate clockwise. The gearbox ratios will help as Creaking Door kindly points out. Another clue would be the prop diameter. If someone could measure, with a flexible tape around the bent tip to the hub centre, a guesstimate at best, this would give us an idea of the prop diameter. Another likely Bristol candidate is the Perseus fitted to the Botha and a good few of these dropped into the Irish Sea.

John

Agree with what has been said so far; definitely from a Bristol engine.

Both the larger gears on the Farman reduction gear are the same size so that means a 0.5:1 reduction ratio (and rules-out any Hercules engines I think). Mercury, Pegasus or (possibly?) Taurus engine; plenty of types that would have spent plenty of time over the sea to choose from with those engine options. I’ll see if I can narrow it down with the reduction ratio.

Many thanks anneorac and John Aeroclub for taking the trouble. I do not know where exactly it was recovered east or west coast.
I hope to get more information. Great stuff indeed from the experts.
regards
Tony K

It’s a De Havilland built Hamilton Standard bracket type three blade prop and probably off a Bristol engined type, Not an American type such as the Hudson. So depending on the diameter and the gearing ratio it can have come from a myriad of types from Blenheim to Sunderland.

John

Four blades? Looks more like a three bladed counter weighted deHavilland prop fitted to a some sort of Bristol engine. Can’t really say more than that from the photo.