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).
List of miscellaneous specifications for fan speed, matrix weights, and cooling system capacity.
| Identifier | ExFiles\Box 149a\3\ scan0173 | |
| Date | 16th June 1936 guessed | |
| Miscellaneous Details. Fan Speed (ph.III) .895 x engine speed. Ph.III Mark VI Matrix E.87003 - weight, 54 lbs. Bentley Mark V Matrix EB.1798 - weight, 31.5 lbs. Water capacity of Ph.III cooling system - 5½ gallons. | ||