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).
Query to Messrs. North & Sons Ltd. about experiments with various brush grades to minimise squeaks on EW6 magnetos.
| Identifier | ExFiles\Box 65\3\ scan0319 | |
| Date | 20th September 1928 | |
| V7791 c. BY.{R.W. Bailey - Chief Engineer} c. Mx.{John H Maddocks - Chief Proving Officer} c. Mailing. EFCL/T. 20th Sept., 1928. Messrs. North & Sons Ltd., Whippendell Road, Watford. Dear Sirs, EW6. Magneto - H.T. brush squeaks. There is, in our Test Dept., a minor complaint of brush squeaks on these magnetos. It occurred to us to query whether you have experimented with various grades of brush with a view to minimising this possibility. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||