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).
Scheme 3417, which details applying a supplementary valve to the oil relay system of an epicyclic 3rd speed gearbox.
| Identifier | ExFiles\Box 15\5\ Scan241 | |
| Date | 4th February 1932 | |
| BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design} C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} E.{Mr Elliott - Chief Engineer} X7310. DAL/M.4.2.32. X.7310 P. 2. EPICYCLIC 3rd. SPEED GEARBOX. Herewith we send N. sch. 3417. shewing method of applying supplementary valve to the present oil relay system to prevent the gear being changed without taking out the clutch. With the exception of the lever brazed to the existing pedal the rest of the present arrangement is unaltered. DA.{Bernard Day - Chassis Design} | ||