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).
Instruction sheet recording speed, ampere, and voltage measurements after adjusting brushes.
| Identifier | ExFiles\Box 3\5\ 05-page239 | |
| Date | 24th January 1939 | |
| R.R. 10B (12/38) (SP{Mr Spinney} JAN 24-1-39) MP 200/13 90941 ROLLS-ROYCE LIMITED. INSTRUCTIONS. HI To Order No. Customer's No. 19 HB{C. E. Harcombe}15. Re Brushes Normal again Speed Amperes Volts 580 0 13.6 600 1.10 13.7 645 2.45 14.0 690 3.80 14.3 740 5.20 14.5 820 7.30 14.8 920 9.30 15.0 1130 11.45 15.30 1355 12.15 15.40 1520 12.35 15.40 Signed [Illegible Signature] This Sheet must be filed on completion of the work. | ||