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).
Notes on engine operating temperatures, battery ignition systems, and observations on new aircraft designs.
| Identifier | ExFiles\Box 173\2\ img185 | |
| Date | 22th February 1934 guessed | |
| II with selchrome and nitro alloy. They use cold pressed Castor and 2% Triethanolamine as a preventative during storage. ③ Glycol Temp of Operation. They are coming to the conclusion that 300°F is too hot for operation and that 250°F is better though they are running both. At 300°F they get spots in the head up to 500°F which is as hot as the air cooled. ④ Battery Ignition. Not much is being done with this at present. The official attitude is that to couple so vital a thing as ignition with all the wiring which is used in a machine is undesirable. However I should have thought they could have protected it with Fuzes. We saw the latest twin engined Wright-bomber there with retractable under-carriage, a new Douglas single engined ground straffing low wing monoplane with fixed under-carriage of small dimensions, well streamlined, and the Boeing pursuit single seater. | ||