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 on a spring, detailing its condition and Brinell hardness after a timed run.
| Identifier | ExFiles\Box 80\2\ scan0311 | |
| Date | 2nd August 1920 | |
| R.P.C. x 3981 SPRING F.363 - 2100 lbs. - parallel tapered ends - no nibs and slots - ground all over - fitted (Handwritten and crossed out: X.2981) (Handwritten and crossed out: X.1331) on bump chassis 28.7.20. No. of leaves | Brinell | Remarks | Time run --- | --- | --- | --- 6 1 | 415 | cracked 1 1/2" from centre rear of clip. | 13 hrs. 15 mins. 2 | 415 & 429 | broken in two places each side of clip. 3 | 444 | cracked under clip. 4 | 444 | O.K. 5 | 429 | O.K. 6 | 415 | O.K. | 14 hrs. 10 mins. Spring taken off 30.7.20. STAMP: RECEIVED E O AUG 2 1920 | ||