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).
Test results for a rear axle on a bumper test, including spring failure analysis and Brinell hardness tests.
| Identifier | ExFiles\Box 119\2\ scan0110 | |
| Date | 14th June 1920 | |
| Contd. REAR AXLE ON BUMPER TEST. Total hours run on chassis. 11.6.20 14.6.20 Remarks. N.S. Spring - 4th. leaf cracked under clip. N.S. bolt F.419 main bearing bracket broken. O.S. spring 2nd, leaf cracked 4th. and 5th. leaves broken under clip. Hours run. 12 hrs. 13. hrs. 45 mins. 17 " 15 " BRINELL TESTS. Spring F.7789 2000 lbs. Leaves. Brin: Remarks. Hrs. run. 1 388 Cracked. 2 375 O.K. 3 363 Broken 4 401 O.K. 5 363 Broken 6 415 O.K 14 hrs. 35 mins. Spring Y.363 1990 lbs. Leaves Brin: Remarks. Hrs. run. 1 401 O.K. 2 388 O.K. 3 401 O.K. 4 388 Cracked 5 388 O.K. 6 375 O.K. 17 hrs. 15 mins. Spring F.7790 2100 lbs. 1 401 Broken 2 363 Cracked. 3 388 O.K. 4 401 Cracked 5 401 " 6 388 O.K 14 hrs. 35 mins. Spring Z.363 2120 lbs. 1 415 O.K. 2 388 Cracked 3 401 O.K. 4 401 Broken 5 388 " 6 388 O.K 17 hrs. 15 mins. Brinell tests contd:- Sheets to follow. | ||