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).
Description of the camshafts, cylinder block and crankcase with component diagrams for a cam and rear bearing cap.
| Identifier | ExFiles\Box 124\5\ scan0118 | |
| Date | 23th December 1933 | |
| -2- Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}9/KW23.12.33. Both the camshafts are driven from a bronze spiral gear mounted in the cylinder head, the centres of the three gears being in line. The camshafts are interchangeable and have about a quarter way along their length a skew gear for driving a distributor if coil ignition is used. The shape of the cams are approximately :- [Diagram of a cam] TWO FLATS CLEARANCE 5 M/M WIDTH OF CAMS .700 1.400 1.060 Cylinder Block. Aluminium in two halves bolted together. Wet steel liners are used. In the middle of the block is mounted a pair of gears driven by the crankshaft pinion and driving the pinion in the cylinder head. Crankcase. This is an electron casting. Mounted on either side are gears to drive the blower and the magneto. An interesting feature is the oil retainer at the rear end. No oil had got through to the clutch pit. Oil is fed into the top half of every main bearing, the top half of the shells being grooved. The rear bearing cap, a very solid aluminium block, has to make an oil seal for the crankcase. Beyond this cap is a recess for the oil flinger. The flinger on the crankshaft is a spiral gear about 2" to 3" dia. and .150 tooth pitch. [Diagram of a rear bearing cap] REAR BEARING CAP. | ||