propellors on Britannia's
In answer to the question why some had round tipped props and some square. In the case of the Brits the square tipped ones were hollow and internal corrosion was starting to take place, and solid steel props to replace them ,were in short supply . The mix and match was a nightmare, as us engineers we were moving props from one engine change to another . As far as I remember we could never fit two of the same to one side only, but could have one of each on both sides . It was great when at last we could have a full set of round ones on one aircraft.
In the engine bay you could not prepare a powerplant with a prop fitted as you never knew what type was on the engine that was to be replaced . Engine changes on Brits were many and frequent and the prop situation made it hard work. Alot of strength was needed to change the props when the removed ones placed on their transit dollies.
Anyone who was involved with Brits will know what I am talking about .
Merv