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).
The required modifications for a left-hand drive American model, including changes to the engine and various components.
| Identifier | ExFiles\Box 40\5\ Scan034 | |
| Date | 27th September 1919 guessed | |
| To BN.{W.O. Bentley / Mr Barrington} from R.{Sir Henry Royce} Copy to CJ. " " WOR.{Arthur Wormald - General Works Manager} " " OY. " " NA.{Mr Nadin} " " DA.{Bernard Day - Chassis Design} " " EH. " " BY.{R.W. Bailey - Chief Engineer} " " EFC. X.3562 R6/G27.9119. RE AMERICAN MODEL. X.3614. X.3562. This will require left hand steering. I have advised Mr. Olley that engine and gear box will be built left handed also, but direction of rotation will remain the same. Mr. Day should be preparing drawings for the necessary modifications, and certain parts will require testing experimentally, such as pump and valve mechanism. As it is intended that specimens of production will be made on both sides of the Atlantic and exchanged, it would appear that we shall have to have a set of patterns for chassis with left hand steering. ENGINE. To run in a clockwise direction same as at present. CRANKCASE. X.3665. Reverse position of camshafts, magneto water, and oil pump drives, supports for carburetter, control etc. CYLINDERS & VALVES. X.3667. X.3668. Will spring round except for fan attachment and radiator support on front cylinders. PISTONS. X.3666. Probably oiled from connecting rod, cancelling extra oil pipes. CRANKSHAFT AND CON. ROD. No change. CAMSHAFT AND ROCKERS. X.3669 Mr. Elliott's part. { It may be found advisable to increase length of rocker arm to push roller further round cam, so as to decrease thrust on rocker. If so, to maintain valve lift exactly to present dimension, would require a higher cam, I prefer to use present standard. | ||