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).
Testing and comparison of Tenoid brake lining grades P and P.M from Morgan Crossley & Co.
| Identifier | ExFiles\Box 26\4\ Scan370 | |
| Date | 24th September 1928 | |
| B409 44466 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from ROY.{Sir Henry Royce} ROY{Sir Henry Royce}7/MG24.9.28 I am advising the Tenoid Brake Lining people, i.e., Morgan Crossley & Co., that the type wr are testing out in bulk it/Grade P - which is the type on which you reported satisfactorily. They ask what experience we had with Grade P.M of which they understood a few were tried out in France. Can you say? Meantime I am asking them in what respect Grade P.M differs from Grade P, and will let you know. ROY.{Sir Henry Royce} | ||