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).
Clarifying bore dimensions for the induction passage of a 20/25 HP chassis cylinder block.
| Identifier | ExFiles\Box 103\4\ scan0121 | |
| Date | 16th November 1934 | |
| x5050 To By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation}8/KW.16.11.34. 20/25 HP. Chassis. Cyl. Block with Cast Induction Passage. With reference to memo. BY/SS.{S. Smith}1/G.3.11.34. Replying to the question in the above-mentioned memo. - (1) The dimension 1.375" is not what we require. (2) The entrance to the Induction passage must obviously line up with the bore of the carburetter. But we do not require the 600 tapered machining. The bore of the carburetter is 1.500" dia. The bore of the ind. pipe is 1.400" dia. Therefore in considering these dimensions the bore should diminish from 1.500" to 1.400", being straight sided in the vertical section as shown on the attached sketch. Hs{Lord Ernest Hives - Chair}/C.T.Salt. | ||