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).
Fan belt stretch, fan noise, the trial of a Cadillac fan, and water loss on car 26.G.VI.
| Identifier | ExFiles\Box 108\1\ scan0101 | |
| Date | 23th August 1937 | |
| To Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} - Chateauroux. c. to Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/GWR. c. to HFS. Rm{William Robotham - Chief Engineer}/Std.11/JH.23.8.37. Referring to your memo. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}8/JAB.22.8.37. in which you remark on the stretch of the fan belts fitted to 26.G.VI. The position is this - when the fan and drive fitted to this car were detailed, the belt which was driven was the nearest standard belt in the British Goodrich list - this happens to be too long so that it provides no adjustment. To obtain a belt of the correct length would entail the expense of making a new mould - if this belt were certain to be standardised this expense would be justified. However the fan as fitted to the car is far too noisy - it was decided therefore to use a different fan running at a lower speed, the Phantom III Cadillac type 5 blade fan being used for this purpose. Such a fan and drive was instructed to be made and fitted to 26.G.VI two months ago Rm{William Robotham - Chief Engineer}/Std.17/AP 25.6.37. before it went to France - the chief new pieces needed being the fan hub and the driving pulleys. This fan was complete towards the end of last week, is being fitted to 27.G.VI here for trial and if satisfactory will be forwarded to France immediately the tests are completed - it will obviously not arrive in France in time to complete much mileage on 26.G.VI but should be used for the radiator suitability tests which we have requested you to carry out - the fan which you have will be useless for this purpose. We do not anticipate any trouble with belts with the new fan, but will send you a spare as a matter of course. Finally we should like some helpful information from you on the question of water loss with 26.G.VI. If possible we should like you to settle definitely whether the loss occurs at steady high speeds, when accelerating or when decelerating. We are carrying out corresponding tests here as and when an up to date car is available. Rm{William Robotham - Chief Engineer}/Std. | ||