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).
Fifth laboratory test report on 40/50 Chassis Brake Springs G335, detailing changes in length after heat treatment.
| Identifier | ExFiles\Box 32\2\ Scan048 | |
| Date | 31th August 1923 | |
| X3458 c.to Hs.{Lord Ernest Hives - Chair} H16 H16/EF31823. Laboratory. Re Tests on 40/50 Chassis Brake Springs G335, (further to our report H11/EF30823.) As requested we have carried out a fifth test on the above springs, and give the results below. Test No. Temp. Time(Approx) at temp. Overall length. Before. After. Increase. 5. 255°C. 30 mins. 3.15" 3.19" 0.04" H1. IHE | ||