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 solid HP valve for testing HP and L.P. chambers.
| Identifier | ExFiles\Box 16\5\ Scan169 | |
| Date | 29th November 1933 | |
| Hs.{Lord Ernest Hives - Chair} 1222. SOLID H.P. VALVE. FOR USE WHEN TESTING H.P. AND L.P. CHAMBER TO 2,500 lb/□" ROLLS-ROYCE, LTD PRINT ROOM NOV 29 1933 DERBY, | ||