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).
Performance figures and dynamo specifications compared to the 40/50 model.
| Identifier | WestWitteringFiles\F\April1921\ Scan49 | |
| Date | 27th April 1921 | |
| To EFC. from R.{Sir Henry Royce} -2- R9/G27/4/21 Contd. The figures I gave you for this were that its characteristic would be at the same road speed as the 40/50, and consequently the curve of performance would permit of about 40% greater number of revolutions, and also the output was not expected to be more than 60 to 70% of the output required for the big car. The dynamo carcase has also been given as not to exceed 5¼". R.{Sir Henry Royce} | ||