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).
Troubles with rocker pedestals and crankshaft dampers on the Peregrine engine.
| Identifier | ExFiles\Box 169\4\ img204 | |
| Date | 24th May 1932 | |
| RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/AD24.5.32. PEREGRINE. There are two obvious troubles which are going to crop up when we run this engine fast. (1) Rocker Pedestals. We have had repeated failures on J.3 steel. Will you therefore please reproduce the modification on Peregrine. (2) Crankshaft Damper. With this crankshaft damper fitted the crankshaft torsional period is too low. Even with the drum alone fitted, the torsional period is too low. When the steel pedestals are fitted we should like to have nothing but the lower retaining ring on the nose of the crankshaft. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||