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).
Specification sheet detailing the diameters and areas of oil ways for a 20 HP engine.
| Identifier | ExFiles\Box 116\1\ scan0143 | |
| Date | 24th August 1937 | |
| 24th. August, 1937. OIL WAYS - 20 H.P. ENGINE. Oil Pump Inlet .625" dia. .306 sq" " " Outlet min. .500" dia. .198 sq" " " " max. (.906" dia - .620" dia) .350 sq" Gallery Pipe. .495" dia. .192 sq" Cylinder Block, to Mains. .339" dia. .090 sq" " Camshaft .205" dia. .033 sq" Crankshaft. .250" dia. .049 sq" | ||