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).
Poundage modifications for axle springs on the J.2 Series Chassis.
| Identifier | ExFiles\Box 16\7\ Scan173 | |
| Date | 13th May 1929 | |
| X74w To BY.{R.W. Bailey - Chief Engineer} from ROY.{Sir Henry Royce} c. to Hs.{Lord Ernest Hives - Chair} ROY{Sir Henry Royce}12/MG13.5.29 AXLE SPRINGS You will recollect we had two or three modifications in the poundage percentages of the Axle Springs sepcified for the first 50 sets J.2 Series Chassis, the final result being as follows:- Fronts. 12 - 950 lbs. 12 26 - 1000 lbs. ~~20~~ 38 - 1050 lbs. ~~6~~ ~~8~~ 14 - 1100 lbs. 36 26 Rears. ~~9~~ 12 - 1100 lbs. ~~18~~ 36 - 1200 lbs. ~~66~~ 28 - 1300 lbs. ~~8~~ 14 - 1400 lbs. Firths are now proceeding with collection of the necessary material for the second 50 sets. Kindly confirm that we are all in accord the poundage percentages suggested for the first 50 sets hold good for the second 50 sets. ROY{Sir Henry Royce} [Stamp: RECEIVED 14 MAY 1929] | ||