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).
Letter requesting a 25/30 piston and discussing the weight of various components like springs and bearings, with comparisons to Cadillac and Bentley parts.
| Identifier | ExFiles\Box 174\2\ img045 | |
| Date | 23th March 1937 | |
| FHS { Hives's copy of a letter from Rm.{William Robotham - Chief Engineer} e/ja { Detroit Athletic Club Detroit March 23rd/37 GRY{Shadwell Grylls}: Please send oy a complete 25/30 piston fitted with rings and in particular with the L shaped centre ring. We have got to accept that our rear road springs are ridiculously heavy. Two 1125 lbs rear road springs for the Cadillac 60, rate 115-lbs/in weigh 70 lbs the pair. We have never broken a Bentley thick leaf spring on the road & unless the bump-test shews something silly we should get the 25-production sets we ordered on the Cars as soon as we can. We should also see that Wraith figures are reasonable. Timken bearings in hubs seem to save a great deal of weight and are perfectly reliable. front Cadillac 60 hubs & bearings, weigh 2.89 lbs the pair. Rm.{William Robotham - Chief Engineer} | ||