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 tracking mileage and performance tests for Morganite Brushes EG2.
| Identifier | ExFiles\Box 60\1\ Scan076 | |
| Date | 19th April 1926 | |
| ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- X8673 Morganite Brushes EG2 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. 16-5-27 | Lab. | 5-9-27 | Bench tested see report PC/12-7-27. Brushes then fitted to I machine for test on car. Brushes bedded, o/put checked (12.0 amps) C angle 122°. brushes measured and comm. cleaned. | — | — | — | — 5-9-27 | 10 EX | 27-9-27 | Removed to be put on 9 EX. | 5,373 | 6,248 | 875 | 875 27-9-27 | 9 EX | 11-10-27 | Fitted to 9 EX. | 9,020 | 9,472 | 452 | 1327 11-10-27 | " | 5-11-27 | | 9,472 | 552 | 1,080 | 2407 5-11-27 | " | 29-11-27 | | 552 | 1,453 | 901 | 3,308 29-11-27 | Lab. | 3-4-28 | Output increased above max. (12.0 A) for purpose of 10,000 miles test. Peak 12.5 A.{Mr Adams} C = 121.5° Brushes measured. | | | — | 3-4-28 | " | 13-4-28 | Test cancelled. I carcase with EG2 brushes fitted with 28 slot arm. N°2. Set to half M.P.O. for 10,000 miles test on 9 EX. | — | — | — | — 13-4-28 | 9 EX | 1-5-28 | Reading taken. | 6,164 | 7,163 | 999 | 999 1-5-28 | " | 1-6-28 | " | 7,163 | 8,468 | 1,305 | 2,304 1-6-28 | " | 2-7-28 | " | 8,468 | 516 | 2,048 | 4,352 2-7-28 | " | 19-7-28 | " | 516 | 1,970 | 1,454 | 5,806 19-7-28 | " | 6-9-28 | " | 1,970 | 2,208 | 238 | 6,044 6-9-28 | " | 1-10-28 | " | 2,208 | 4,368 | 2,160 | 8,204 1-10-28 | " | 26-10-28 | " | 4,368 | 5,460 | 1,092 | 9,296 26-10-28 | " | 1-12-28 | " | 5,460 | 7,446 | 1,986 | 11,282 1-12-28 | " | 4-1-29 | " | 7,446 | 8,119 | 673 | 11,955 4-1-29 | " | 1-2-29 | " | 8,119 | 8,179 | 60 | 12,015 Test completed 1-2-29. 19.4.26. | ||