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).
Continuation of a bumper test, showing Brinell hardness test results for the leaves of a spring.
| Identifier | ExFiles\Box 80\2\ scan0129 | |
| Date | 29th April 1920 guessed | |
| -2- X2628 Contd:- Bumper Test. Spring F.4666 - 2324 lbs. BRINELL TEST. Leaves. Brinell. Remarks. 1 444 O.K. 2 444 O.K. 3 429 O.K. 4 415 O.K. 5 444 broken centre. 6 401 & 415 " 7 444 & 444 " 8 444 & 444 " " 1/8 9 388 O.K. 10 444 O.K. 11 401 O.K. Run 29 hrs. 5 mins. | ||