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 report for two leaf springs, detailing specifications, installation, and failure analysis.
| Identifier | ExFiles\Box 119\2\ scan0122 | |
| Date | 7th August 1920 | |
| X1331 SPRING. F.{Mr Friese} 363 - 220 lbs. - parallel leaves - tapered ends - no nibs and slots - ground all over. X.3981. Fitted on O.S. Bump Chassis 3.8.20. X.1331. No. of leaves 6. Brinell. Remarks. Time run. 1 444 1st. leaf O.K. 2 415 2nd. leaf cracked under rear clip. 17 hrs. 30 mins. 3 415 3rd. leaf very small crack under rear clip. 4 415 4th leaf cracked front of first clip. 5 415 5th leaf cracked front of first clip. 6 415 6th. leaf O.K. Spring taken off 7.8.20. SPRING F.363 - 2100 parallel leaves, tapered ends - no nibs and slots - ground all over. Fitted to N.S. Bump chassis 27.7.20. 1 444 1 st.{Capt. P. R. Strong} leaf cracked under front clip. 16 hrs. 15 mins 2 415 1st. leaf broken. 18 " 35 " 3 429 3rd. leaf broken front of clip. 23 " 4 415 2nd. leaf cracked front of clip. 25 " 45 " 5 415 4th. leaf cracked under front clip. 6 444 5th. and 6th. leaves O.K. Spring taken off 7.8.20. R.R. 199 (250T) (SD676 19-7-17) MP 18.2865 | ||