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 report for a Bleriot A.T. Speedometer.
Identifier | ExFiles\Box 50\4\ Scan164 | |
Date | 30th January 1928 | |
†4308 30.1.28. BLERIOT A.T. SPEEDOMETER. Instrument No. B.39 - 675 - 16-52, tested 30.1.28, was found to read 55.2 m.p.h. at 604 r.p.m. at 17ºC. Instrument was then put on chassis 15-EX for a 10,000 mile test. Correct - 52.5 5.1% fast. 54.8 at 600 m.p.h. r.p.m Normal tyre figure 52.6 EFC. {E. Fowler Clarke - Electrical Engineer} B.39 | ||