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 different crank materials, detailing run time, reversals, and flywheel RPM.
| Identifier | ExFiles\Box 63\4\ scan0122 | |
| Date | 18th August 1930 guessed | |
| -2- CRANK MATERIAL. S/ZNCR. Brinell 310. Crank No. Total Time Run. Reversals. Average Flywheel R.P.M. 1 2 hrs, 15 min. 106,840 396 2 1 hr. 34 min. 74,320 396 3 1 hr. 24 min. 66,700 397 CRANK MATERIAL. VNCA. 2 1 hr. 46 min. 84,340 398 4 1 hr. 24 min. 65,380 390 3 1 hr. 48 min. 85,700 397 CRANK MATERIAL. Nitro Alloy. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||