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 crank models DES.989 and E.32053, detailing performance metrics.
| Identifier | ExFiles\Box 63\4\ scan0118 | |
| Date | 19th May 1930 | |
| -2- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/MJ.19.5.30. Cotnd. DES.995.(continued). Model of DES.989 Crank. Webs .295" Thick. Flywheel R.P.M. increased to 400. Stroke 6". Total time run 2 hrs. 42 min. Total reversals 129,080. Average R.P.M. 398. FINIS. DES.995. Model of Standard Crank E.32053 - No.2 - previously subjected to Torsion Test. Flywheel R.P.M. 400. Stroke 6". Inertia increased by 30%. Total Time run 1 hr. 9 min. Total reversals 54, 560. Average R.P.M. 396. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||