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).
Revisions to the vacuum control for an epicyclic 3rd speed gearbox, specifically regarding the piston and stops.
| Identifier | ExFiles\Box 6\2\ 02-page138 | |
| Date | 10th January 1931 | |
| X523 BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design} X523. DA{Bernard Day - Chassis Design}3/M10.1.31. C. to SG.{Arthur F. Sidgreaves - MD} HS.{Lord Ernest Hives - Chair} EPICYCLIC 3rd. SPEED GEARBOX REVISED - VACUUM CONTROL. We send herewith N. sch. 3194. shewing the proposed new position for the stops. It will be seen that we suggest that the piston can be slotted opposite the pin as it is located and the length of the piston is principally to retain the pin. With reference to the piston, on further consideration we think that it does not matter if the head of the aluminium nut is reduced below that of the bore as the air cushioning is removed and intended to be replaced by the cork buffer if any is found necessary. We therefore propose to retain the present design of piston with the modification to the nut diameter indicated. DA.{Bernard Day - Chassis Design} | ||