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).
Outlining testing parameters and acceptable limits for the Bentley Revolution Indicator.
| Identifier | ExFiles\Box 165\4\ img212 | |
| Date | 20th July 1933 | |
| X1307 Hs{Lord Ernest Hives - Chair}/Wst. (struck through) Wor.{Arthur Wormald - General Works Manager} (struck through) Bp. (struck through) BY/RD3/W.20.7.33. Bentley Revolution Indicator. With reference to Hs{Lord Ernest Hives - Chair}/Wst3/MA.13.7.33. stating that rev.counters should be checked at 4500 R.P.M. and should show a Hasler reading not more than 1100 R.P.M., this figure will be subject to the limits which have been laid down, i.e. +- 2% and, therefore, the Hasler readings will be as follows :- 1103. -2% 1125 +2% 1082 These limits have been agreed to by the Experimental Department and, therefore, instruments should be passed at that. BY/RD. | ||