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 failures and outlining cooling system test procedures.
| Identifier | ExFiles\Box 108\1\ scan0079 | |
| Date | 17th August 1937 | |
| To Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} Hotel de France, Chateauroux, Indre, FRANCE. Handwritten notes: 600a also 300a We have not yet received any damaged parts of the P.III fan which gave trouble on 32-EX and gather that only the bearings failed, in fact there seems to be some doubt as to whether they failed or not. Will you please let us have a complete report on the failure and let us know whether the bearings were lubricated or not also whether the hub was still packed with grease. You should now have two complete Cadillac 5 blade fan sets - will you please return whichever set is not fitted to the car. We are still awaiting a report from you as to what water loss has taken place on 32-EX. We require some figures on which to estimate the adequacy of cooling of the Wraith car. We are forwarding to you shortly a new fan for this car. When this is fitted will you please carry out the following tests as soon as the opportunity permits. The car should be driven each way full throttle over a stretch of road where maximum speed can be held for 5 - 10 miles and the temperature of the water entering the top tank should be recorded every 1/2 mile throughout the two runs. The bottom water temperature and the atmospheric temperature should also be recorded at the same time. Speedometer readings should be given. This test should be carried out as far as possible on a windless day. The car should then be idled in a spot sheltered from direct winds after a flat out run and similar readings taken every 2 minutes until temperatures are steady. Finally we should like to know whether any improvements have been made as regards water loss on 25-B-VI Rm{William Robotham - Chief Engineer}/Std. | ||