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).
Requirement for larger exhaust silencers on the P. 2 and 25HP cars.
| Identifier | ExFiles\Box 14\6\ Scan219 | |
| Date | 20th October 1931 | |
| COPY. X7230. SG.{Arthur F. Sidgreaves - MD} FROM R.{Sir Henry Royce} C. to WOR.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} C. to BY.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} R2/M20.10.31. X7230 X5230 P. 2. & 25HP. EXHAUST SYSTEMS. Experience at Derby is shewing that we require bigger silencers on both our cars, as with the increased HP. the present silencers - if made free enough to reduce the losses to a reasonable amount are not silent enough. We are therefore using the Phantom silencer on the 25HP., and making a newer and larger silencer for the Phantom. R.{Sir Henry Royce} | ||