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).
Letter from Maurice Olley in Springfield to Mr. Robotham in Derby regarding piston and connecting rod assemblies.
| Identifier | ExFiles\Box 23\4\ Scan015 | |
| Date | 25th January 1928 | |
| C O P Y. Rolls-Royce of America Inc. Springfield, Mass. Jan. 25th. 1928. OY3/R.1.25.28. Mr. Robotham, Rolls-Royce Ltd., Derby, England. Dear Mr. Robotham, RE. PISTON. Replying to your note re. weight of Pierce-Arrow piston and conn. rod assembly, I do not really see that we are likely to have any opportunity of checking up this information. I have no doubt personally that the weight given is substantially correct. The saving would be in the duralumin conn. rod and in the 'Bohnalite' steel-strut piston. These are made very light I know from personal observation. Would it not be a good idea to send us an experimental order for say 20 sets of duralumin conn. rods for the Phantom (these are forged locally) and a similar number of Bohnalite steel strut pistons, the design of the latter to be left more or less to the recommendations of the Bohn. Al. and Brass. Corp. subject to your approval. Practically the whole American trade is swinging to this combination on this year's cars, following the 3 years lead of Chrysler. Yours truly, Maurice Olley. MO r.{Sir Henry Royce} | ||