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).
Bench test results for a new Bensport starter motor compared to the existing 20/25 motor, with plans for cold weather testing.
| Identifier | ExFiles\Box 62\1\ scan0145 | |
| Date | 5th July 1933 | |
| E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/st.{Capt. P. R. Strong} c. to Sg.{Arthur F. Sidgreaves - MD} c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} c. to PM. c. to Da.{Bernard Day - Chassis Design} <6134 Hs{Lord Ernest Hives - Chair}/Wat.8/MA.5.7.33 NEW BENSPORT STARTER MOTOR TO R.R. SCH.399. We have carried out a bench test on the first motor made up to the above scheme and attached please find curves shewing the performance of this motor in comparison with the 20/25 motor now being fitted to the Bensport chassis. These curves shew that this new motor gives a very much better performance than the 20/25 in fact the B.H.P. is over 50% better and the stalling torque approximately 30%. On the whole the results are very gratifying and should enable us to effect a satisfactory start on the Bensport engine under the worst conditions. We are arranging to take a Bensport to a freezing chamber in order to try starting from cold with several degrees of frost. Hs{Lord Ernest Hives - Chair}/st.{Capt. P. R. Strong} | ||