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).
Proposed experiments for the engine's fan, belt, and radiator cooling system.
| Identifier | WestWitteringFiles\I\May1922\ Scan92 | |
| Date | 10th December 1930 | |
| R.R. 235A (100 T) (S.H. 728. 10-12-30) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 3947 (3) that it will be necessary to watch that the fan belt is not slack. Even if done automatically with a spring adjustment it would get to the end of it's stroke. The following experiments should be made:- What is the advantage of the larger fan with it's larger pulley? It should be arranged that the speed of the fan can be taken under various belt tightenings. Whether a spring support for the fan is practical? Whether the radiator is more efficient with or without cowling? What is the rise in the temperature with full power on the engine with various temperatures of air entering the radiator? (Mr. Elliott points out that the 40/50 fan belts are prepared by ourselves on the stretching rigs by running for many hours. Was the Goshawk belt so prepared, and was it lubricated, as the pin wear may have been very rapid if absolutely dry.) Having done all we can to the fan and the belt we turn to the water circulation to avoid as far as possible loss of water, hoping that steam only shall be lost. Mr. Platford has maintained that the tower on the top of the radiator tank does enable the steam to separate from the water before going down the overflow pipe. But I doubt if this is really efficient and I fear the water was thrown out of the cylinders of the engine in a way by priming, rather than bubbles of steam coming away in and with the water. If it is priming as undoubtedly is the case with all engines if dirty water is used, then the case is pretty hopeless and would require some changes in the head, such as more outlets. This we can see is possible without very much spoiling the appearance. | ||