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).
Private memo about the failure of an Exp.III test due to sub-standard fuel with an octane number of 74.
| Identifier | ExFiles\Box 27a\4\ Scan099 | |
| Date | 20th April 1933 | |
| S/W. (Private) 81-82 Lp{Mr Lappin}2/LAM.20.4.33. To Hs.{Lord Ernest Hives - Chair} from Lp.{Mr Lappin} With reference to the first failure of Exp.III due to detonation, I have now heard concerning the fuel, a sample of which I have had tested. Under the conditions of A.M./D.T.D.134 Test, i.e., an S.30 engine at 100° C. and 900 R.P.M., this fuel does not meet the Air Ministry specification, having an octane number of 74. If you should wish to take it up with the suppliers, it is important not to mention the medium through which we had this fuel tested. Lp.{Mr Lappin} | ||