List of engine component modifications and their corresponding part numbers.
| Identifier | ExFiles\Box 169\1\ img084 | |
| Date | 1st June 1930 | |
| (2) RHC {R. H. Coverley - Production Engineer} /WSC {W. S. Cassel} 1/MS21 .6.30 Valves & Fittings to LOP. E.78569. E.80599 Tappets. 2% Nickel Case Hardening Steel. Inlet Pipes to LOP. E.80311 - LeC 2788. (1) Exhaust Heated bend. (2) E.80899 Cover replaces E.80285. Carburetter to LOP. E.80530. Incorporating LeC 2786 Mod. to Air Silencer. Scheme 1220 Modified Petrol Inlet. E.80742 Carb. Body replaces E.78727. Camshaft to LOP. E.78987. E.80598 Camshaft. 2% Nickel Case Hardening Steel. Magneto & Dynamo Drives to LOP. E.79067. Throttle Governor & Water Pump Drive to LOP. E.78978. Idler Gear to LOP. E.77658. Ignition Governor to LOP. E.78992. Extra Cylinder Lubrication to LOP. E.80668 - Scheme 1247/a. Vacuum Pump to LOP. E.78998. Water Pump to LOP. E.79093 - LeC 2789. Casing E.80557 to suit revised Controls. Oil Pump to LOP. E.78890. contd. | ||
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).