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).
Comparative table of the number of engine parts for Wraith, Phantom III, B.50-6, and B.50-8 models.
| Identifier | ExFiles\Box 108\2\ scan0095 | |
| Date | 1st June 1938 | |
| 600. 1st. June 1938. WRAITH, PHANTOM III & B.50 - 6 & B.50 - 8 ENGINE PARTS. Number of parts on Wraith, Phantom III, B.50-6 and B.50 - 8 engines by sections showing number of parts common to the respective units. These figures do not include any stock parts under K.{Mr Kilner} numbers or rubber, bakelite, or vellumoid parts. This list includes only one off in every case. P.III. WRAITH III. COMMON TO BOTH. B.50 - 6. B.50 - 8. COMMON TO BOTH. Crankcase & Bearings. 146 includes 79 7 84 includes 88 includes 80 liners & block. Block. Block. Crankshaft. 22 20 3 20 20 19 Harmonic Balancer. None None 9 9 8 Spring Drive 30 26 4 None None Connecting Rod. 16 8 1 8 8 8 Piston. 8 6 0 6 6 6 Cylinder. 25 37 includes 1 16 16 13 Cyl.block. Valves & Fittings. 31 25 10 25 28 23 Inlet Pipes. 22 13 0 13 13 0 Carburetter (Parts made Counted as part of Fuel System. by R.R.) Air Silencer. 16 26 2 26 26 24 Camshaft 18 18 0 9 10 1 Dynamo Drive. 25 23 2 None None Water Pump Drive. 5 5 1 None None Idler Gear. 11 None 0 None None 9 Ignition Gov. & Drive. 27 27 5 9 9 Cross Drive Shaft. 12 None 0 None None Water Pump 23 19 14 12 12 12 Oil Pump. 16 13 4 12 12 12 Wheelcase & Fittings. 11 4 1 4 4 4 Water Connections. 26 14 3 10 10 7 Oil Fittings & Petrol 38 43 5 33 33 29 Drain Pipe. Oil Filler. 11 13 10 13 13 13 Oil Filter. 10 16 0 3 3 3 Oil Sump Indicator. 44 23 0 8 8 8 Relief Valves. 17 14 8 14 14 14 Pressure Oil Filter. 19 0 0 None None Oil Temp. Regulator. 10 0 0 None None Wire Fittings. 22 5 0 1 1 1 Ban. 13 11 1 8 8 8 Petrol Pump. None None Counted as part of Fuel System. 694 488 82 343 351 302 Number of Pieces necessary to make (1) Wraith & Ph.III Engine, 1100. (2) B.50-6 and B.50-8, 392. | ||