Blueprint diagram illustrating a required alteration to the exhaust valve seating to prevent hammering.
| Identifier | ExFiles\Box 5a\1\ 01-page261 | |
| Date | 29th November 1931 | |
| H.S.495 EXHAUST-VALVES-HAMMERING INTO BOTTOM OF SEATING ANGLE OF GUIDE MUST HAVE ALTERED. INLET EXHAUST EXHAUST PORTS THIS PORTION OF SEATING CLEAR OF VALVE. G.W.H. 18 G IV 29-11-31 | ||
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).