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).
Recommendation from test results to incorporate a double exhaust system and new camshaft on the B.III model.
| Identifier | ExFiles\Box 99\1\ scan0161 | |
| Date | 9th May 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}9.5.38. From the tests carried out, a double system of exhaust should be incorporated on B.III which together with the new camshaft we are producing should give a silenced figure of 125 BHP. and maximum M.E.P. of 120 lbs/sq.in. against the present production Bentley of 110-112 BHP. and maximum M.E.P. of 113-115 lbs/sq.in. and yet retain a better standard of idling and quieter operation of valve gear. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||