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).
Comparing Morganite and Le Carbone dynamo brushes, proposing to fit a set on an experimental car.
| Identifier | WestWitteringFiles\I\July1922\ Scan106 | |
| Date | 24th July 1922 | |
| Contd. -2- EFC4/T24.7.22. You will see that the EC2 has, according to the respective makers, the same specific resistance as the Z Le Carbone. Subject to your approval we would like to fit a set of these to run on the dynamo on the experimental car. The Morganite brushes have the advantage of being able to use their patent fibre spiral pig-tail insulation which we all consider so much superior to the beaded insulation which is the best form of insulation Le Carbone's can supply. EFC. Table att. | ||