Governor-controlled fanspeed drive with an accompanying diagram.
| Identifier | ExFiles\Box 154\1\ scan0110 | |
| Date | 12th February 1934 | |
| -7- Ha/Rm. {William Robotham - Chief Engineer} 4/KW.12.2.34. the radiator and give almost complete silence, and at the same time be enormously efficient for hill-climbing. It will also be at least worthy of trial on the tank, though I fancy they cannot give much draught away even at high engine speeds. I am bringing a sample back and will find out patent situation. Have seen the latest drawings of the governor controlled fanspeed. This is being worked at hard to provide a drive that also will not over speed the dynamo (many here are now belt driven). In its latest form - The bottom pulley is spring loaded only and opens out to reduce drive ratio under the influence of the governor. Ha/Rm. {William Robotham - Chief Engineer} | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).