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).
Instructions detailing the investigation of an engine coil that mysteriously weakens at high temperatures.
| Identifier | ExFiles\Box 69\1\ scan0138 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8 12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To...................................................19.... Order No. (3) Customer's No. ....................... Allowing the engine to pick up slowly to normal running speed we found that the B.I. would function OK. The conclusions arrived at therefore is that this coil mysteriously became weak after being subjected to a high temp for about 30 mins, and we intend to test a standard coil similarly to prove whether this is due to paraffin waxed paper insulation or not. A.W.P We are also testing a similar coil at 100°C in our oven in the lab to try and reproduce the effects observed above. Signed H.E.W. This Sheet must be filed on completion of the work. | ||