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).
Inertia machine test graph showing coefficient of friction and temperature versus the number of stops for a brake material.
| Identifier | ExFiles\Box 141\3\ scan0096 | |
| Date | 27th July 1932 | |
| FILE UNDER X3409. BRITISH BELTING & ASBESTOS LTD. SCANDINAVIA MILLS, CLECKHEATON, YORKS., ENGLAND. INERTIA MACHINE TEST. COEFFICIENT OF FRICTION TEMP. DEGREES. F.{Mr Friese} C. NUMBER OF STOPS COEFF. OF FRICTION --- TEMPERATURE Material: MINTEX N.M.T. COMP. 2" x ¼" Bentley. Brake Rig: STANDARD B.B.A. Drum: CAST IRON Time Interval: 2 MINUTES Flywheel R.P.M. 955 Drum Speed: 3,000 Ft/Min. Power Absorption per Stop 214,000 Ft. Lbs. 29,600 Kg. Metres Weight Loss: 12.0 Gms. Wear Factor H.P. Hrs per Gramme. Date 27 JULY 32. Test No. C 242 I.M. Mark. 3 | ||