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).
Test results for an A.T. Speedometer with a small type dial after repair of its faulty trip counter.
| Identifier | ExFiles\Box 50\4\ Scan245 | |
| Date | 28th August 1928 | |
| X.4308. 28.8.28. A.T. SPEEDOMETER B.563, 14-52. SMALL TYPE DIAL. This instrument has now been re-tested by us after return to the makers for repair of faulty trip counter. At 600 r.p.m. and temp. of 23.0 o C., the m.p.h. reading was found to be 46.3. EFC. {E. Fowler Clarke - Electrical Engineer} | ||