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).
Comparison of LEPAZ brake drums with steel and cast iron, including a recommendation for lining material.
| Identifier | ExFiles\Box 120\1\ scan0140 | |
| Date | 1st May 1934 | |
| (4). LEPAZ BRAKE DRUMS. CONTD. (9). FURTHER COMMENTS. (a) Steel drums are frequently distorted as received. (b) Cast Iron drums are also usually distorted as received due to the machining operation removing the tight outer layer which relieves internal stress. (c) LEPAZ is undistorted after machining due to relief of all stresses in the annealing treatment. (10) CONCLUSION. LEPAZ is superior to Steel or Cast Iron and more nearly satisfies all the requirements than any other metal. (11) FERODO RECOMMENDATION OF LINING. Ferodo recommend their M.R. material for use with LEPAZ. If greater heat conductivity from the lining is desired, F.B.A. can be used since LEPAZ is non-scoring. BS.{A J. Barnes - Assistant Manager} | ||