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).
Clarifying the maximum instrument temperature and RPM limits for the Bentley Rev Counter.
| Identifier | ExFiles\Box 165\4\ img213 | |
| Date | 21th July 1933 | |
| 86004 By/RD. From Hs{Lord Ernest Hives - Chair}/Wst. Hs{Lord Ernest Hives - Chair}/Wst.5/MA.21.7.33. BENTLEY REV COUNTER. In our Hs{Lord Ernest Hives - Chair}/Wst.2/MA.12.7.33., we omitted to state in the last paragraph that the limits given should be at a maximum instrument temperature of 30°C. which is very important, hence our later instruction Hs{Lord Ernest Hives - Chair}/Wst.3/MA.13.7.33. During a conversation with Mr.Arrowsmith of the A.T. Co., who was with us yesterday we raised the question of the ± 2% limit and he definitely stated that he could and would produce our instruments correct to our figures allowing of course for the 2% temperature variation. Our figure therefore if "not more than 1100 R.P.M." should stand as this relieves the test dept. of having to consider the temperature error. Hs{Lord Ernest Hives - Chair}/Wst. | ||