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).
Receipt of experimental spiral road springs and their loading test results.
| Identifier | ExFiles\Box 95\2\ scan0222 | |
| Date | 29th July 1937 | |
| 346 Rm.{William Robotham - Chief Engineer} BY/Mtn11/N.29.7.37. Re: Experimental Spiral Road Springs. We attach hereto copy of letter received from Dr.Hatfield in regard to three further sets of experimental springs, that have been sent to us, together with copy of their loading test results. These springs are at present in BY's office. BY/Mtn. | ||