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).
Note about the diameter of a tapered tube and the promise to send a modulus graph for revised axle tubes.
| Identifier | ExFiles\Box 49\1\ Scan268 | |
| Date | 14th February 1921 | |
| -2- DA{Bernard Day - Chassis Design}1/AH14.2.1921. ---------- circle a little, and therefore the diameter of the tube at the large end of the taper. In the course of a day or so we shall send you the modulus graph of the revised axle tubes. DA.{Bernard Day - Chassis Design} | ||