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).
List of six points comparing design and material choices, such as aluminium versus cast iron, for engine construction.
| Identifier | ExFiles\Box 3\4\ 04-page066 | |
| Date | 30th June 1932 | |
| - 2 - E.2/HP.30.6.32. are:- (1) Greater rigidity. (2) Extra weight not so much as on Peregrine, due to simplicity of cylinder casting, all camshaft gear being on head. (3) Aluminium construction demands double rubber glands. (4) Less cost. (5) With present cylinder centres there is the minimum of metal between the bores for the central cylinder studs, and danger of bursting the bosses if in aluminium. (6) In view of the small size of the cylinder and main bearing studs C.I. probably safer. With the C.I. block mild steel caps of light but deep section are used instead of heavy section duralumin. E.{Mr Elliott - Chief Engineer} Print attached. | ||