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, its gears, and engine mounting.
| Identifier | ExFiles\Box 126\1\ scan0069 | |
| Date | 24th January 1938 | |
| - 6 - OIL PUMP. See Ex.S.403-4. External - and can be removed without disturbing any other unit. Oil Pressure 25 to 30 lbs/sq.in. Although the pump is on the outside of sump, it is very silent. (We think this is due to the heavy C.I. pump body). Relief valve is carried in the cover of the pump and is of the piston type with a very low rated spring. The C.I. cover is recessed to relieve pressure when oil is trapped in root of gears. PUMP GEARS. P.C.D. 1.200 dia. (Spread Centres) O/Dia. 1.540 Dia. (Approx.) No. of Teeth - 7 D.P. 6 Spiral Angle 0° Length 1.250 SPIRAL DRIVE GEARS. No. of Teeth 13 P.C.D. 1.116 (Approx). D.P. 14/15 } approx. Spiral Angle 36° } Hand of Spiral R.H. ENGINE MOUNTING. See Ex.S.397 and Ex.S.405. Three point mounting one at front centre, takes vertical, lateral and pumping movements. Two at rear take torque and damp engine vibrations, and are mounted between flywheel housing and 2nd. cross member. | ||