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).
Criticisms and proposed modifications for the gear control system on several car models.
| Identifier | ExFiles\Box 178\3\ img248 | |
| Date | 25th June 1932 | |
| [Header] HS.{Lord Ernest Hives - Chair} ) FROM HDY.{William Hardy} BY.{R.W. Bailey - Chief Engineer} ) [Struck through] Cr{Mr Cra???ster / Mr Chichester} to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} B. DA.{Bernard Day - Chassis Design} [Struck through] ORIGINAL. [Handwritten notes top right] under X5310. X7310. X4027. GEAR CONTROL. R.{Sir Henry Royce} has criticised the gear control on the 25HP. car here - 16-G-4. - on the score of undue heaviness of operation of the lever sideways, due to oil drag, and also too high a spring load and spring rating on the reverse stop. To remedy the former trouble we suggest [handwritten above: definitely] counterboring by a few [handwritten above: clearance] thousandths of an inch the well lubricated inner bearing in the aluminium of the change lever bracket from the outer end to such a depth that 1" of bearing remains adjacent to the gearbox face. This will remove 1.25" of bearing surface. The outer bush is only 1.2" long and should not be altered unless the necessary improvement cannot be made on the inner bearing. As regards the latter fault we find that the reverse stop on 16-G-4. requires a load of 5 lbs. to commence its movement, and about 9 lbs. to depress it fully. This should be reduced to 2 lbs. initial load, with an increase when fully compressed of not more than 50%. [handwritten: = max 3 lbs] The above modifications, if found to be satisfactory, should be made to all cars - 25HP., Phantom, J.{Mr Johnson W.M.} 3., and Peregrine. [Handwritten notes at bottom] [scribbled out word] boring beefed up R.R. handled. U.P! HDY.{William Hardy} [Signature] | ||