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).
Pierce Arrow parts, comparing their bore and crank pin diameter specifications to the 20 HP model.
| Identifier | ExFiles\Box 6\1\ 01-page124 | |
| Date | 1st March 1923 | |
| To Na.{Mr Nadin} from Ha/Rn.{Mr Robinson} c. to B.J. X5010 44586 Hs{Lord Ernest Hives - Chair}/Rdl/LGS1.3.23. We thank you for your note of the 17th.inst. with reference to the Pierce Arrow parts. These will be of considerable interest in spite of the fact that the bore is 3¼", because we think they are remarkably light considering that the crank pin dia. of the Pierce Arrow is no less than 2¼" against the 1.5" of our 20 HP. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||