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).
Motor modifications, starter motor comparisons, and car damping adjustments.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan202 | |
| Date | 11th November 1928 guessed | |
| (2) Make a curve of the motor's torque at different amperes, and its state of magnetisation up to reasonable saturation. I have looked over the drawing, and the above are the quantities we should recommend for trial. What were the proportions on EAC. 7. which perhaps seemed more nearly right than some of your more recent attempts? Under the circumstances all the heavy conductors, armature and field, should be rectangular rather than circular which reduces the area. Many of the American starter motors are extremely small. Send me as soon as possible your technical data of a motor with ¼" longer iron (a very easy modification), which may give you better armature conductors. We return (under separate cover) the EAC.7. pinion. I want EAC. 7. back at WW. by Wednesday morning (14th. inst.) Mr. Fuller will be here, and we must make a little show of activity. I sent the car to you for the single purpose of increasing the damping at the back, either at all speeds, or with the restrictor passage, or preferably both. 10-G-4. to me seems excellent. R.{Sir Henry Royce} | ||