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).
Confirming an agreement to make moulded test pieces from various powders to test for deterioration and shrinkage of commutator materials.
| Identifier | ExFiles\Box 50\5\ Scan110 | |
| Date | 20th July 1922 | |
| to Mr. Brock. from EFC. {E. Fowler Clarke - Electrical Engineer} X. 4333 EFC {E. Fowler Clarke - Electrical Engineer} 1/T20.7.22. X. 4333 - RE MOULDING MATERIALS FOR COMMUTATORS X 3513 This will confirm our conversation of a few days ago that you will be making up moulded test pieces from various moulding powders to two sets of dimensions, noted by you at the time of our conversation. For the purpose of the experiments we wish to carry out on the deterioration and shrinkage, we should be glad if you would provide us in duplicate with the test pieces of dimensions for the crushing tests. We should, after carefully taking the dimensions of these, maintain these at the temperature of melting solder for some hours and examine the resulting effects. EFC. {E. Fowler Clarke - Electrical Engineer} | ||