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).
Engineering improvements to the chassis and engine to mitigate impulses and achieve a quieter vehicle.
| Identifier | ExFiles\Box 12\6\ 06-page021 | |
| Date | 13th March 1931 guessed | |
| (2) I am not saying our chassis is as perfect as it ought to be, but if it were we could not expect to get a good silent car with a body which had an undamped period anywhere near our engine impulses, whether they come from - Gas pressure - 6 per 2 revs. Piston weight - 3 per rev. Couples - 1 per rev. We are still hoping anxiously to get some benefit from keeping the flywheel steadier - light and stiff, and the crankshaft straight - balance weights. P. 2. crankshaft flange looks very thin. To make a proper move we should do all the improvements to one engine as quickly as possible. (1) Thicker crankshaft flange; this should be altered on production at once. (2) The WW. dimensions of back plate. (3) More bolts. (4) Lighter flywheel (less overhang) and less weight in parts remote from bearings. If all this does no good then parts are not wrong, but one feels that they must shew some change. If so you can easily work backwards to find the greatest sinner. If no change, and a fault is proved to exist then we can only conclude it is the crankchamber, and we should get some good fromb the balance weights. R.{Sir Henry Royce} | ||