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).
Two photographic views of a belt-driven fan and dynamo test rig assembly.
| Identifier | ExFiles\Box 135\4\ scan0044 | |
| Date | 15th December 1939 guessed | |
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