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).
PD.340 Full Bump Pistons and Modified Combustion Chambers for the B.60 engine.
| Identifier | ExFiles\Box 123\5\ scan0245 | |
| Date | 23th December 1938 | |
| Poles BY/HS{Lord Ernest Hives - Chair} 10.HH c. Rm.{William Robotham - Chief Engineer} DA.{Bernard Day - Chassis Design}1/G.23.12.38. Sivell B.60. ENGINE - PISTONS. Please receive PD.340 Full Bump Pistons and Modified Combustion Chambers for the B.60 engine. The drawing shews the head cut away and metal left on the face, to correct the compression ratio. It is thought this may be got out of the castings. It is suggested that this drawing should be detailed so that it can be instructed as soon as the result of the half-bump piston test is known this week. DA.{Bernard Day - Chassis Design} | ||