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).
Design and specifications for crankshaft dampers on J.2 and Peregrine 2 engines.
| Identifier | ExFiles\Box 138\1\ scan0050 | |
| Date | 15th November 1932 | |
| 8634 To R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} E.8/HP.15.11.32. re Crankshaft Dampers - J.2. and Peregrine 2. Please find herewith blueprints LeC.3259 and LeC.3276 dealing with the above. It is desired to mount the fan pulley on the slipper flywheel. This has been tried experimentally, and appears to be quite satisfactory. In the case of the Peregrine the damper torque is capable of transmitting 15 HP at 5000 r.p.m., and on J.2. 13 HP. at 4000 r.p.m. The drawings show the design adapted to suit existing crankshafts, as these cannot be altered on the experimental engines. The crankshaft has keys for both the parallel and taper portions, but we have left out the key in the latter, as we do not think it necessary if we utilize the key in the parallel portion and we avoid an awkward feature in the hub. The flywheels are made with a small flange overlapping the split, to prevent the ingress of dirt. We have extended the bushing of the front flywheel as far forward as possible to carry the pull of the fan belt. The bushings shown are in Halo, but we have an alternative material known as Ferobestos, which makes a very good moulded bushing. E.{Mr Elliott - Chief Engineer} [STAMP] RECEIVED NOV 21 1932 | ||