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).
Memo discussing engine balance, crankshaft dampers, and sourcing a specific type from a London supplier.
| Identifier | ExFiles\Box 173\1\ img414 | |
| Date | 6th February 1934 guessed | |
| and that they can definitely detect anything above 2 ozs out of balance on the road. I do not think that we can parallel their results but might with advantage do some tests on a number of cars whereby we find an average of how much out of balance we can detect. Wright & Crank. Nine bearing 2 3/16 pins 2 1/8 journals. No troubles with Crankshaft periods. I enclose a print of the Crankshaft damper that they employ on all cars. You will see that it is a combination of a rubber spring with friction damping. As such I should expect it to be very effective. They say it deals with a wide range of frequencies better than the Lanchester, stays put indefinitely, and costs 3# per car less. They prefer it to the Chrysler type which they say gave them some difficulty. If you want one of these dampers you can buy one from Leonard Williams. Great West Rd. London. | ||