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).
Continued Brinell hardness test results for various spring leaves.
| Identifier | ExFiles\Box 119\2\ scan0111 | |
| Date | 22th June 1927 | |
| RFC File C BRINELL TESTS - contd Spring F.7787 1900 lbs. Leaves. Brin: Remarks. Hrs. run. 1 439/415 Broken 2 352 Cracked. 21hrs. 15 mins. 3 388 " 4 388 " 5 388 O.K. 6 388 O.K. Spring F.7788 (tapered ends) 2000 lbs. Leaves. Brin: Remarks. Hrs. run. 1 401 O.K. 2 388 O.K. 21 hrs. 15 min 3 401 O.K. 4 401 O.K. 5 388 O.K. 6 388 O.K. Spring 363.Z. C2. 2216 lbs. Leaves. Brin: Remarks. hrs. run. 1 388 Cracked. 2 388 Broken. 9 hrs. 15 mins. 3 415/388 " 4 401 O.K. 5 352 O.K. 6 388 O.K. CS [STAMP] EFC JUN 22 1927 RECEIVED. [EDGE OF PAGE] R.R. 199 (2501) (SD676 19-7-17) MP186865 | ||