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).
Checking Mr. Royce's explanation of phenomena related to a starter motor with helical teeth.
| Identifier | ExFiles\Box 64\2\ scan0107 | |
| Date | 3rd May 1928 | |
| Hs{Lord Ernest Hives - Chair} c. BY/RD. c. EFC. X762SA BY11/G.3.5.28. EAC.7. STARTER. Referring to R8/M28.4.28. the phenomena described by Mr. Royce could be definitely checked as to whether he is correct in his explanation of same if the complete starter motor which was produced for 9-EX. and has helical teeth of 5° spiral with sharp corners on the teeth were fitted to EAC.1 chassis. I mention this particular chassis because it is the one for which the scheme was produced, and the parts are not suitable for any other, but as soon as the parts are available it is desirable to fit same and see if the knock is present with a helical gear. BY.{R.W. Bailey - Chief Engineer} | ||