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).
Letter from B. S. Cunningham discussing the procurement and properties of 100 octane fuel compared to 87 octane fuel for engine use.
| Identifier | ExFiles\Box 174\2\ img228 | |
| Date | 3rd November 1927 guessed | |
| B. S. Cunningham Telephone, Fairfield, Conn-140 Greens Farms, Conn. weighs only 1050 lbs. I would like to compare this with the weight of the 3 ½ or 4 ¼ litre Bentley engine. I have obtained some 100 octane fuel which I am going to mix with the 87 octane I have been using, in order to cut out the pinking which I am beginning to get due to carbon probably. The 100 octane fuel is being sold here in airplane motors, and costs only about a little less than 1 shilling per gallon. I understand it doesn't contain any more ethyl than the 87 octane fuel, but is just more highly refined. I haven't as yet used any of it. Do you think it could cause any damage to the valves or pistons? It seems quite easy to purchase around here. The drive I took in the new | ||