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).
Patent cover sheet concerning aeronautical propeller blades and methods of locating the pitch axis.
| Identifier | ExFiles\Box 147\2\ scan0274 | |
| Date | 21th March 1940 guessed | |
| 38 No. Patentee. Title. ing to Aeronautical Propeller Blades and Methods of Locating the Pitch Axis of Variable-pitch Propeller Blades. ----------------------- | ||