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 detailing tests and measurements for an advance lever and sparking system.
| Identifier | ExFiles\Box 50\2\ Scan193 | |
| Date | 7th January 1923 | |
| RR 238(150 BKS.) SH57.29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. 7-Jan-1923. To Order No. W. A. {Mr Adams} 1 Customer's No. X4334 (2) Range of Advance lever = 19°. (3) OK (4) OK Force required = 3 lbs to 3 lbs 4 oz (5) OK. (6) OK (3 1/2 m.m. gaps) (7) Slowest speeds at which regular sparking occurs on 3 1/2 mm gaps in air (a) Fully advanced 320 R.P.M (b) Central position 430 R.P.M (c) Fully Retarded 520 R.P.M. Signed H.E.W. This Sheet must be filed on completion of the work. | ||