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).
Blueprint for an experimental silencer designed to suit a 2.50 inch diameter intermediate pipe.
| Identifier | ExFiles\Box 14\6\ Scan230 | |
| Date | 25th November 1931 | |
| H.S. 476, EXPERIMENTAL II SILENCER TO SUIT 2.50" DIAM. INTERMEDIATE PIPE., SHEATH DRILLED LIBERALLY WITH .250 DIAM HOLES, SPOT WELD, SLIDING FIT, WELD, MODIFIED TO SUIT 2.5" DIAM INTERMEDIATE PIPE AND CENTRE CUT OUT TUBE, STIFFENED UP AS ON H.S. 468, BAFFLES WITH .0625" ANNULAR CLEARANCE AS ON H.S. 468, CENTRAL TUBE 2.500" OUTSIDE DIAM: DRILLED WITH 64 HOLES .3125" AT 2.00" PITCH, STEADY BAFFLE FOR CENTRE TUBE, .500", 4.00", STD FIT, END OF CENTRAL TUBE TREATED AS ON H.S. 468., ALTERED TO SUIT 2.50" DIAM. CENTRE TUBE, INTERMEDIATE PIPE LAGGED WITH ASBESTOS (ON INSIDE) ASBESTOS HELD IN POSITION BY SHEATH - TO BE DRILLED WITH 80 HOLES .3125" DIAM:, 25 NOV 31, DERBY | ||