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).
Sketch showing modifications to a Japan cylinder head to give increased clearance around inlet valves.
| Identifier | ExFiles\Box 5a\5\ 05-page174 | |
| Date | 1st October 1937 | |
| H/P...s/AD. 57.10.37 RECENT MACHINING INLET R + 300 DIA 1.000 RAD. 180 MOD. HEAD 350 RAD. 1.125 RAD. SKETCH SHOWING MODIFICATIONS TO JAPAN CYLINDER HEAD TO GIVE INCREASED CLEARANCE ROUND INLET VALVES. | ||