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).
Comparison of the metal section between valves on the 25/30, Wraith & Bentley II models.
| Identifier | ExFiles\Box 10\3\ 03-page139 | |
| Date | 27th May 1938 | |
| RM.{William Robotham - Chief Engineer} 531 VENTURI INLET PORT (WRAITH II) EXHAUST .312 INLET 1.400 DIA, .250, 1.600 DIA S.C.D. 317 ST'D PROD 4 1/4 LITRE BENTLEY EXHAUST .125, .187 INLET 1.400 DIA, .250, 1.600 DIA E.B. 3121 ST'D WRAITH II EXHAUST .187, .187 INLET 1.400 DIA, .250, 1.600 DIA E.W. 1296 PROD. 25/30 H.P. EXHAUST .125, .312 INLET 1.225 DIA, .438, 1.400 DIA E.{Mr Elliott - Chief Engineer} G1031 POSITION OF VALVE SEAT WARPING ON WRAITH & BENTLEY IN, EX VALVES NOT SEATING HERE COMPARISON OF METAL SECTION BETWEEN VALVES ON 25/30, WRAITH & BENTLEY II ROLLS-ROYCE LTD. PRINT ROOM 27. MAY. 1938 No. DERBY | ||