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).
Inquiry to The Midland Motor Cylinder Co. Ltd. regarding the material 'Chromidium' for brake drums.
| Identifier | ExFiles\Box 142\4\ scan0150 | |
| Date | 16th January 1936 | |
| X1203 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/AFM.{Anthony F. Martindale}20/KW. 16th January, 1936. The Midland Motor Cylinder Co.Ltd., Birmid Works, Smethwick, Birmingham. Dear Sirs, With reference to your Brake Drum advertisement in the January Automobile Engineer. Two gentlemen have recently recommended your "Chromidium" to our attention; namely, Mr. Longley of Ferodo's and Mr. George Eyston. We should be very much obliged if you would let us have full details of it, especially - Young's Modulus. Co-efficient of Thermal Expansion. Co-efficient of Thermal Conductivity. Brinell Figure. Specific heat. If you have any photomicrographs of this material, etched or unetched, they would also be of value to us. Trusting to hear from you shortly, I am, Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||