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 alternative installations for Harrison and Clayton heaters.
| Identifier | ExFiles\Box 137\1\ scan0330 | |
| Date | 15th December 1937 guessed | |
| HARRISON HEATER FITTED FLUSH PROVISION MUST BE MADE FOR AIR INLET CLAYTON HEATER FITTED FLUSH. PROVISION MUST BE MADE FOR AIR EXIT SKETCH OF ALTERNATIVE HEATER INSTALLATIONS. | ||