Rotol was a British company set up jointly by Rolls-Royce and the Bristol Aeroplane Company during World War Two for the manufacture of aircraft propellers. The Rolls Royce logo Rolls-Royce is a set of several companies, all deriving from the British automobile and aero-engine manufacturing company founded by Henry Royce and C.S. Rolls in 1906. ... The Bristol Aeroplane Company (formerly British and Colonial Aeroplane Company) began building primitive Bristol Boxkites in a former tram shed and became famous for the production of the war-time Blenhein and Beaufighter, the Brabazon airliner prototypes, the Britannia and Freighter and the Belvedere and Sycamore helicopters. ... Mushroom cloud from the nuclear explosion over Nagasaki rising 18 km into the air. ... A propeller can be seen as a rotating fin in water or a wing in air. ...

The Rotol name is a contraction of Rolls-Royce and Bristol.