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).
The re-toggling of rear shock absorbers and the correct coupling length relative to spring depth.
| Identifier | ExFiles\Box 79\2\ scan0017 | |
| Date | 6th April 1922 | |
| TYPED TEXT: REAR SHOCK ABSORBER. RE TOGGLING OF SAME. By the scheme for couplings on the Rear Shock Absorber we have a different length of coupling for each different strength of spring. I would like to be quite clear upon the fact that the correct length of coupling has been used in relation to the depth of the rear spring. For a spring depth of 1.950 or thereabouts, the coupling should be 3.400. For a spring depth of 2.190 approximately, the coupling should be 3.650". For a spring depth of 2.470 the coupling should be 3.950. I would like you to try up a chassis which has been fitted with the correct coupling in comparison with the spring depth for toggling, as it is somewhat difficult to vary very much from the position already arranged for, due to the fact that in one direction we foul the frame, whilst on the other hand there is very little clearance between the bracket on the axle and the coupling. The only way I see of improving the scheme would be to increase the length of couplings in each case by increasing the bend on the bottom bracket carrying the bottom ball socket. BY.{R.W. Bailey - Chief Engineer} HANDWRITTEN TEXT: Top of page: R.R.199 (250T) (SD676 19-7-17) MP180865 Messrs Broughs note for future action. Exp. Dept. inform Brough 7/4/22 X4329 To Mr Goverly 6S II etc. can we state this on Report CP some connect forward to Hs.{Lord Ernest Hives - Chair} BY2-P6.4.22. ED{J. L. Edwards} 7/4/22 R22 X4329 Left margin: 6S II as delivered 2 3/8" H.P. 4.25 coupling seen before Hy{Tom Haldenby - Plant Engineer}-Hs.{Lord Ernest Hives - Chair} 7/4/22 re 6S II & asked to report. Bottom right: BY (initials) | ||