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).
Experimental record sheet for a Bleriot A.T. Speedometer detailing reading change tests.
| Identifier | ExFiles\Box 50\4\ Scan230 | |
| Date | 30th January 1928 | |
| LARGE DIAL. X.4308 Change of reading test ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 4308 Bleriot A.T. Speedometer No. B.39 - 675 - 16/52 TABLE DATA: Row 1: - Date on: 30-1-28 - Location: Test in lab - Date off: 1.2.28 - REMARKS: at 600 RPM it read 54.8 MPH at 17ºC. See file report dated 30.1.28. - Miles reading start: - Miles reading finish: - Miles covered: - Total miles: Row 2: - Date on: 2-2-28 - Location: 15EX - Date off: ? - REMARKS: Put on 15EX for 10,000 mile test - Miles reading start: ? - Miles reading finish: ? - Miles covered: - Total miles: Row 3: - Date on: ? - Location: 10 EX - Date off: 22-8.28 - REMARKS: Change of reading test - Miles reading start: ? - Miles reading finish: 09510 - Miles covered: - Total miles: Row 4: - Date on: 22.8.28 / 1-10-28 - Location: 10 Ex / Lab - Date off: 3-9-28 / 10.1.29 - REMARKS: [faded text] - Miles reading start: 09510 - Miles reading finish: 10416 - Miles covered: 906 - Total miles: 906 Row 5: - Date on: 10.1.29 - Location: Lab. - Date off: - REMARKS: Test for change of reading. At 600 R.P.M. at 17ºC it read 52.5 m.p.h. i.e. 4.2% less. At 30ºC reading was 50.9 i.e. a reduction from 17º to 30º of 3.3%. - Miles reading start: - Miles reading finish: - Miles covered: - Total miles: FOOTER NOTES: No further record kept- Total Miles not known | ||