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).
Materials and experiments for car engine crankshaft dampers.
| Identifier | ExFiles\Box 14\2\ Scan006 | |
| Date | 1st February 1928 | |
| E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} BY.{R.W. Bailey - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} X7010 R2/M2. 2.28. CAR ENGINES - CRANKSHAFT DAMPERS. X.634 X.7010 X.8010 X.8300 I am expecting a report on he best material for the friction surface. Our old practice of using fibre was nought good. We now have thin cork and woven cotton compared with bakelite. Either of these should be better. Also I have suggested experiments between dry, greasy, and really lubricated. We cannot on EAC. detect any crankshaft period. At 22 m.p.h. the engine would be running about 700 r.p.m., and the slipper flywheel ought not to stick (appear solid) so this ought to be easily cured. Suppose the flywheel never sticks at its natural period then we have 2 minor periods to damp, and the friction should be sufficient for these, in fact it must be sufficient for the worst are not the speeds .5 and .33 of the main period which we must never touch. I am trying to arrive at the idea that as we keep clear of the main period the friction does not need to vary providing we can avoid the swing between the two wheels, which I can hardly believe can exist, because originally when I tried to fix the front wheel I failed to the extent of pulling off the small end of the crankshaft. R.{Sir Henry Royce} | ||