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 use of a new filter, LeC.4721, on all cars.
| Identifier | ExFiles\Box 135\2\ scan0122 | |
| Date | 7th January 1936 | |
| To Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} x 1138 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}18/KW.7.1.36. I attach copies of two notes with reference to the new filter LeC.4721, which it is proposed to use on all cars. These I think are self-explanatory. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||