Graph showing pressure versus engine RPM in the Phantom II cooling system with different nozzle and valve configurations.
| Identifier | ExFiles\Box 24\5\ Scan217 | |
| Date | 13th January 1934 | |
| PHANTOM II COOLING SYSTEM PRESSURE IN WATER JACKETS AND RUBBER JOINTS DUE TO RESTRICTED DELIVERY NOZZLE AND RESTRICTION VALVE IN TOP WATER PIPE TO LE C 2675 THE RESTRICTED DELIVERY NOZZLE HAS REDUCED SLOTS .250 WIDE .625 LONG Graph Legend: RESTRICTED DELIVERY NOZZLE RESTRICTION VALVE (Le C 2673) CLOSED RESTRICTION VALVE (Le C 2673) OPEN Y-Axis: PRESSURE IN WATER SYSTEM (LBS / □ IN) X-Axis: ENGINE R.P.M. Bottom Center: 2. Stamp Text: ROLLS-ROYCE LTD. RECEIVED JAN 13 1934 DERBY C.D.O. | ||
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).