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 for production Bentley V engines with specific 7-1 and 6.5-1 ratio pistons.
| Identifier | ExFiles\Box 168\3\ img202 | |
| Date | 10th June 1939 guessed | |
| BENTLEY V WITH 7-1 R.C. PISTONS EB.4740 & 6.5-1 R.C. PISTONS EB.4587 DISTRIBUTOR GOVERNOR CURVE FOR PRODUCTION RANGE TO BE 15° + 1° LIMIT 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 O.{Mr Oldham} 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. Axes: Y-Axis: DEGREES ADVANCE ON DISTRIBUTOR X-Axis: DISTRIBUTOR SPEED R.P.M Data Table: DEGREES ADVANCE ON DISTRIBUTOR ± 1/2°: 0, 2, 4, 6, 8, 10, 12, 14 DISTRIBUTOR R.P.M.: 166, 239, 368, 562, 780, 1010, 1262, 1528 RANGE 15° + 1° LIMIT | ||