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).
Letter from Scandinavia Belting Ltd. regarding the performance and testing of brake lining materials.
| Identifier | ExFiles\Box 26\4\ Scan211 | |
| Date | 31th December 1924 | |
| Copy of Letter. From SCANDINAVIA BELTING LTD. 59, Southwark Street LONDON S.E. 1 31st.December 1924 Messrs. Rolls-Royce Ltd. Nightingale Road. DERBY Buying Dept. Ref: ROY{Sir Henry Royce}13/MG21.12.23 Dear Sirs, Further to our letter of the 27th inst; replying to yours dated the 21st; but received on the 27th inst; we have now the following comments from our Works. From tests made on a National Physical Laboratory Machine, they agree that when "Halo" Lined Brakes have been on for some time and become hot, the co-efficient of friction is considerably reduced. These tests, however, have rarely exceeded 220°F, the drum being water cooled. Under normal service conditions they doubt if the material can become so hot as to render it dangerously ineffective, for immediately it cools slightly it recovers its efficiency. Tests of our "Brabestos" Fabric - Woven Asbestos & Brass Wire - shew that its efficiency increases slightly when it becomes hot, although actual experience on the road tends to prove to the contrary. It will interest us to know if the results you have obtained are from bench or road tests. Yours faithfully, "SCANDINAVIA " BELTING LTD. T.Dalmaine. Director. TED/AS ENCLOSURE No 247 JUSTSO | ||