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 modifications and weights for engine components like pistons and governors.
| Identifier | ExFiles\Box 18\1\ Scan006 | |
| Date | 9th February 1927 | |
| 12-EA X78240 #8 -2- RHC{R. H. Coverley - Production Engineer}1/RE.9.2.27. 9.EAC.11.UNIT Ignition Governor Modified Cam D.51508 & Shaft E.75518 with sharper taper to facilitate extraction. 4.2.27. Piston Set of Maxium Pistons E.75540(4.5 to 1 comp:) otherwise to L.O.P. E.75414. 6.2.27. Weight of Std. Pedestal type Piston (complete with rings, gudgeon pin (brackets, nuts, bolts etc). - 2.705 lbs. Weight of Maxium (4% copper) Piston E.75540(complete with rings, gudgeon pin brackets, nuts, bolts etc). - 2.265 lbs. Difference in Weight - .440 lbs. Alum: Weight of Std. Pedestal Piston alone - 1.703 lbs. " " Maxium (4% Copper) Piston (E.75540 alone). - 1.281 lbs. Difference in Weight - .422 lbs. Cylinders New Cylinders E.70229/30 fitted. 6.2.27. | ||