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).
Requesting a motor armature with a 20° spiral be substituted for one with a 5° spiral for testing on a sequence starter rig.
| Identifier | ExFiles\Box 64\1\ scan0294 | |
| Date | 2nd July 1927 | |
| To RHC.{R. H. Coverley - Production Engineer} from EFC. X7620 EFC2/T2.7.27. NO.1 SCHEME SEQUENCE STARTER TESTING RIG. We have duly made tests on the sequence starter motor rig with the present motor with the armature with 5° spiral, and have noted the various results. We should now be pleased if you would have this motor armature changed for the one which we have in here with the 20° spiral, on which we wish to make a similar series of tests. We should be pleased if you could have this done at your early convenience. EFC. | ||