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).
Specifications for the oil pump, radiator, fan, water pump, and lubrication system.
| Identifier | ExFiles\Box 126\5\ scan0147 | |
| Date | 8th March 1938 guessed | |
| - 5 - OIL PUMP. (SS.{S. Smith}25, 26, 27) The oil pump is driven from the camshaft by a steel shaft which is 12" long and .494 diameter fitted with gear, which is fixed to the shaft by a key. Outside diameter of gear 1.1718 and has 11 teeth. Shaft also drives the distributor. 2 spur gears in the pump. 1 gear is in steel 1.3915 o/dia. and 1.250 long. 12 teeth. 2nd. gear is in a bronze alloy 1.3915 o/dia. and 1.250 long, 12 teeth. Pump Casing is in a heavy section C.I. RADIATOR. John Marston's. Frontal area of matrix 289 sq.in. Depth of matrix 3" FAN AND WATER PUMP. (SS.{S. Smith}34). Fan and water pump are one unit fitted to the front of the cylinder block. Pump discharges direct into cylinder block. The fan is a 6 blade unsymmetrical type and 13.900 o/dia. Fan is fixed by four .250 set screws. Blades are fixed to fan flange by three mushroom headed rivets. Thickness of blades 15 SWG. (.072) (Alum). See sketch SS.{S. Smith}34.37.88. LUBRICATION. Pressure Oil to Main Bearings. Pressure Oil to Camshaft. Pressure Oil to Rocker Shaft. Pressure Oil to Gudgeon Pin. See sketch SS.{S. Smith}3. | ||