The 'Goshawk 11' rear dumb iron and axle clearance, detailing issues with the rear spring and shackle.
| Identifier | ExFiles\Box 49\3\ Scan027 | |
| Date | 5th February 1921 guessed | |
| x4261 To Da. {Bernard Day - Chassis Design} from E. {Mr Elliott - Chief Engineer} c. to CJ. c. to Wor. {Arthur Wormald - General Works Manager} c. to Hs. {Lord Ernest Hives - Chair} c. to By. {R.W. Bailey - Chief Engineer} c. to EFC. {E. Fowler Clarke - Electrical Engineer} X.4862. E1/G5.2.21. RE "GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 11" REAR DUMB IRON AND x4261/ AXLE CLEARANCE. We send you herewith drawing Lec.1343 giving particulars of - The rear spring Attachment of rear spring to back axle. Rear spring shackle. Rear dumb iron and cross tube, The spring shewn is the one described on our recent drawing Lec.1341. This spring should be arranged so that it is flat under normal load, but is not level, the centre line of the top leaf being .250 lower at the rear end. 6 It was desired at one time to fit slings under the axle to limit the rebound, but these were found impracticable, owing to the presence of the tie rod which takes up all the room near to the spring, and does not leave a smooth space for the sling band. If an extreme rebound occurs, which might conceivably have the effect of swinging the rear axt shackle right over, then the lubricator on the shackle bolt would be sheared off. Supposing that both shackles had gone over, and the fact had not been noticed, the absence of the lubricators might cause attention to be drawn to the reverse position of the shackles. Contd. | ||
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).