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).
Engine specifications including bearing dimensions, timing, capacities, and electrical system details.
| Identifier | ExFiles\Box 125\1\ scan0047 | |
| Date | 17th June 1930 guessed | |
| -2- Vibration damper fitted. Crankshaft counter weighted. Thrust taken on No.3 bearing (middle bearing) Bearing dias. and lengths:- No.1 2.625 x 2.187 2 " x 1.375 3 " x 1.500 4 " x 1.375 5 " x 3.562 (c) Timing Train:- 1 1/2" Morse Link-Belt. Automatic Adjustment. Crankshaft gear - steel. Generator gear - steel. Camshaft gear - Cast iron. (d) Valves. Silchrome 1.45 dia. 45° angle. 6.062 long, .339 stem dia. Lift .343. Springs: 65 lbs valve closed. 130 lbs valve open. Timing: I.O. - T.D.C. I.C. - 44° after B.D.C. E.C. - 5° after T.D.C. E.O. - 39° before B.D.C. (e) Oil pressure - 30 lbs. at 60 m.p.h. Oil capacity - 8 Imp. quarts. Fuel capacity - 21 Imp. gallons. Fuel feed - Vac. tank with Vac. pump. Water capacity - 6 Imp. gallons. Fan belt - Dayton rubber. (which we use on Am. P.I and recommend). III. Electrical. Ignition Timing - Full retard. 10° before D.C. Automatic advance 24°. Manual 38°. Ignition Coil - 2 amps - Engine standing. 2 1/2 " - Engine running. No separate ballast resistance. (This is Delco Remy 6 volt armoured coil with outside primary - like Am. Bosch, etc.). cont'd.{John DeLooze - Company Secretary} | ||