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 of the Peregrine rear springs, shackles, and frame fittings.
| Identifier | WestWitteringFiles\H\April1922\ Scan7 | |
| Date | 25th April 1922 | |
| To Hy.{Tom Haldenby - Plant Engineer} from Da.{Bernard Day - Chassis Design} c. to EJ. c. to Her. c. to Hs.{Lord Ernest Hives - Chair} ✓ [Stamp: ORIGINAL RECEIVED] [Stamp: APR 28 1922] PERI I REAR SUSP'N Da{Bernard Day - Chassis Design}1/M25.4.22. PEREGRINE REAR SPRINGS & END OF FRAME. X4474 <s>X4473</s> We send herewith N.sch. 1257 shewing the Peregrine rear spring together with the shackles and frame and fittings modelled on Goshawk 11. We have increased the surface of side thrust of the rear shackles but we have not altered the area of the front end as we think in view of Mr. Royce's most recent remarks, we ought to have more confirmation of the necessity for altering this before we add the considerable increase of weight to the spring eye. It will be noticed that we have embodied Mr. Royce's most recent instructions on the spring shackles namely, a hardened loose washer between every surface, the washer to be larger in diameter than the spring eye, and shackle surfaces and a suitable undercut arranged so that the shackle surface shall stand out. The washers on the shackled bolts are recessed to allow the bolt to have a full bearing in the shackle. We indicate longitudinal grooves in the spring bushes as well as circumferential. The question of spring gaiters and enclosing the spring shackles is being dealt with as a separate subject. For one thing we are awaiting the result of the Derby experiments with gaiters enclosing all the spring mechanism. Da.{Bernard Day - Chassis Design} | ||