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).
Three proposals to address the dynamo's cut-in speed in relation to the Hypoid Axle.
| Identifier | ExFiles\Box 62\3\ scan0245 | |
| Date | 21th September 1931 | |
| X6005 E.{Mr Elliott - Chief Engineer} C. Wor.{Arthur Wormald - General Works Manager} c. Hs.{Lord Ernest Hives - Chair} BY.6/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 21.9.31. RECEIVED 1931 SEP 28 JAPAN 111 - DYNAMOS. Mr. Davis has pointed out to me the fact that with the Hypoid Axle, assuming the mean of the three axle ratios which are proposed for the above car, that the dynamo will not cut in until a speed of 13 1/2 miles an hour has been attained :- This means we should :- a/- Reconsider the present dynamo dimensions to see if we can squeeze a little more out of this long suffering unit. b/- Give some more generous dimensions. c/- As we are not running a magneto, (which has previously controlled the speed,) we could increase the dynamo speed, which seems to me to be the best proposal of the three. BY.{R.W. Bailey - Chief Engineer} BM | ||