Note foreseeing limitations with the means of hobbing a spiral gear situated between two cams.
| Identifier | ExFiles\Box 124\1\ scan0265 | |
| Date | 27th November 1939 guessed | |
| emerges upwards at about 45°. I forsee Some limitations such as the means of hobbing the Spiral gear which is between two Cams. JNR. {Charles L. Jenner} | ||
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).