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).
The test results of a 20 HP engine fitted with a large crankshaft, comparing it to the standard engine.
| Identifier | WestWitteringFiles\J\January1923\ Scan2 | |
| Date | 1st January 1923 | |
| ORIGINAL. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}3/LG1.1.23. 20 HP. ENGINE WITH LARGE CRANKSHAFT. X4221 We have been running a 20 HP. engine on the test bench fitted with the large crankshaft. So far the results show a distinct advantage over the present engine. We have run the engine up to 3,500 r.p.m. and there was no sign of the friction flywheel wobbling out of truth. On any of the standard engines which we have run under the same condition, the flywheel wobbles alarmingly at this high speed. Also on the standard engines, whenever this wobble takes place, the taper on the end of the crankshaft to which the friction flywheel is fixed, always becomes torn up. After the high speed running was done on the engine fitted with the large crankshaft, the taper on the end of the crankshaft was still perfect. We shall shortly be having this engine fitted into a chassis to test it. Hs.{Lord Ernest Hives - Chair} | ||