Test report and diagrams for a Borg & Beck clutch (Type 11A N=26) after 31,628 miles of use.
| Identifier | ExFiles\Box 101\2\ scan0261 | |
| Date | 8th March 1937 | |
| 22 C.V BORG & BECK CLUTCH (TYPE 11A N=26) AFTER 31,628 MILES LEFT DIAGRAM: T.D.C TOTAL CLEARANCE BEFORE TEST .008" AFTER TEST .010" TOTAL CLEARANCE BEFORE TEST .007 AFTER TEST .013" TOTAL CLEARANCE BEFORE TEST .006 AFTER TEST .010 CENTER TEXT: ALL DRIVING LUGS SLIGHTLY GROOVED BY COVER AND SCORED BY OPERATING LEVERS SCRAP VIEW: SCRAP VIEW OF DRIVING LUG SHOWING MARKS CAUSED BY COVER AND OPERATING LEVERS. MARKS CAUSED BY OPERATING LEVERS. RIGHT DIAGRAM: COMPRESSED THICKNESS OVER LININGS TAKEN BETWEEN SAWCUTS AND RIVET HOLES THICKNESS BEFORE TEST .320" Measurements around the disk (clockwise from top): .308, .307, .307, .308, .307, .309, .308, .309, .308, .308, .309, .308, .307, .306, .307, .307, .306, .307, .308. STAMP: ROLLS-ROYCE, LTD. PRINT ROOM. 8 MAR 1937 DERBY. REFERENCE: Ex I. 134 | ||
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).