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 the coefficient of friction over time for mild steel on cast iron versus 'Halo' asbestos brake lining.
| Identifier | ExFiles\Box 26\4\ Scan278 | |
| Date | 19th February 1926 guessed | |
| CO-EFFICIENT OF FRICTION MILD STEEL ON CAST IRON AVERAGE CO-EFFICIENT OF FRICTION = 0.278 MINUTES CO-EFFICIENT OF FRICTION "HALO" PATENT WOUND NON-METALLIC ASBESTOS BRAKE LINING AVERAGE CO-EFFICIENT OF FRICTION = 0.302 MINUTES X 4388 | ||