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).
Modifications to the SS. Vacuum Pump to increase efficiency.
| Identifier | ExFiles\Box 64\1\ scan0040 | |
| Date | 4th June 1929 | |
| X7510 To BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/ACL. c. to Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/ACL1/LG4.6.29. SS.{S. Smith} VACUUM PUMP. The appended prints V.640/1 shew modifications we have made to the ports in both piston and cylinder of the SS.{S. Smith} Vacuum pump which we find increases the efficiency with regard to fuel delivery. The modification consists of enlarging the lower port of the cyl. and also the piston. We recommend this modification be applied to all further parts. Hs{Lord Ernest Hives - Chair}/A.C.Lovesey. | ||