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).
The initial test results for the Bentley starter motor, noting suboptimal performance and proposed improvements to the field winding.
| Identifier | ExFiles\Box 62\1\ scan0236 | |
| Date | 20th March 1934 | |
| 26134 E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to By.{R.W. Bailey - Chief Engineer} c. to By/RD. Hs{Lord Ernest Hives - Chair}/Wst.7/MA.20.3.34. BENTLEY STARTER MOTOR TO R.R.SCH.508. We have now tested the first motor produced to the above scheme. The results we have obtained shew an increase of 15 lb inches in the stalling torque, no increase in the maximum BHP. but an increase in the efficiency at maximum BHP. point of .10. These results were not as good as were expected and upon examining the scheme we consider a lot of space has been wasted in the field circuit. We have pointed this out to By/RD. and an improved field winding is now being schemed out. This will have the effect of reducing the total motor resistance as well as to improve the magnetization. A further report will be issued with curves when the new field winding has been tried. Hs{Lord Ernest Hives - Chair}/Wst. | ||