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).
Letter to North & Sons regarding photostat copies of Make-Ratio Speed Curves for Aero Magneto Contact breakers.
| Identifier | ExFiles\Box 43\4\ Scan078 | |
| Date | 7th May 1927 | |
| X 4021 EFCL/T. 7th May, 1927. Messrs. North & Sons, Whippendell Road, Watford. Dear Sirs, During your recent visit, you will remember we promised you copies of Make-Ratio Speed Curves of Aero Magneto Contact breakers, and we now have pleasure in enclosing two photostat copies of same. It will be remembered that we pointed out the improvement represented by the curves for the Watford IS.12 magneto No.83139 (of later date) as compared with that of IS.12 No.83132. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||