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).
From Maurice Olley to Mr. Royce regarding the design and quiet operation of an Ahlen gearbox.
| Identifier | ExFiles\Box 136\4\ scan0031 | |
| Date | 16th July 1930 guessed | |
| -2- to Mr.Royce. We do not know whether this demonstration has already taken place. We suggest that the Ahlen is one of the most interesting designs, since the engagements are made by dog-clutch with very little noise, and by actual test the two higher speeds are almost equally silent, presumably due to the use of internal gears. Very truly yours (Sd) Maurice Olley. | ||