Bren gunner of the 8th Royal Scots at Moostdijk, Holland, 6. November 1944.

Scots in Holland

A British Cromwell Mk IV tank of the 2nd Regiment, 8th Armored Brigade in Trie-Château, France.

Cromwell tank

Boulton Paul Defiant TT Mark I, DR863, on the ground at the Boulton Paul Aircraft Ltd aerodrome, Wolverhampton. Following tests at the Aeroplane and Armament Experimental Establishment, the aircraft joined the Gunnery Research Unit at Exeter. © IWM (ATP 10751B)
Found this photo with above caption on my FB page.The small 4 bladed prop is part of the mechanism for the target winch explained another poster .Still don't know exactly what to make of that.Excuse my ignorance but can anyone explain how that works?Thank you :)
greetz,brummbar