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).
Distributor governor curve graph for a Bentley V engine with 7-1 R.C. pistons.
| Identifier | ExFiles\Box 97\5\ scan0197 | |
| Date | 2nd June 1939 guessed | |
| FIG. IV. RANGE TO BE 15° + 1° LIMIT BENTLEY V WITH 7-1 R.C. PISTONS DISTRIBUTOR GOVERNOR CURVE FOR PRODUCTION WITH FIXED IGNITION TO BE TIMED 5° ON FLYWHEEL AFTER T.D.C. WITH D.C.D. 1373 VERNIER ADJUSTMENT TO BE TIMED AT T.D.C. WITH VERNIER SET AT 0. IF DETONATION OCCURS ON TEST IGNITION TO BE RETARDED BY MEANS OF VERNIER. THE ANTICIPATED SETTING FOR SHELL NO. 1 IS BETWEEN 2 & 4 ON THE VERNIER SCALE. THE INSTRUCTION BOOK SHOULD REFER TO THE USE OF THE VERNIER TO SUIT THE FUEL USED. NO 3 PETROLS ARE NOT RECOMMENDED. DEGREES ADVANCE ON DISTRIBUTOR DISTRIBUTOR SPEED. R.P.M. DEGREES ADVANCE ON DISTRIBUTOR ± 1/2° 0 2 4 6 8 10 12 14 DISTRIBUTOR R.P.M. 166 289 368 562 780 1010 1262 1528 RANGE 15° + 1° LIMIT | ||