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).
Blueprint for a modification to a Bensport J.I. cylinder head, involving machining and trepanning.
| Identifier | ExFiles\Box 179b\3\ img029 | |
| Date | 12th January 1933 | |
| V1452 CEILING TO BE LOWERED INLET EXHAUST NOTE - .100 IS TO BE MACHINED OFF CYLINDER HEAD FACE. TO BE TREPANNED ON THE INLET SIDE. SECTION A.A. 1.10R 1.00R 1.4700 ±.005 ROLLS-ROYCE LTD. PRINT ROOM DERBY MODIFICATION TO CYL. HEAD. (E.56604) BENSPORT. J.I. C.F.S 11-1-33 JAN 12 1933 | ||