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 diagram showing a component modification for external water cooling.
| Identifier | ExFiles\Box 179b\3\ img217 | |
| Date | 18th February 1933 | |
| FIG 1 THIS SLEEVE REMOVED FOR EXTERNAL WATER COOLING ROLLS-ROYCE LTD. PRINT ROOM FEB 18 1933 DERBY ...ER FITTED WITH ...TECTOR | ||