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 drawing of an Exhaust Hot Spot Silencer.
| Identifier | ExFiles\Box 13\3\ 03-page122 | |
| Date | 17th October 1929 | |
| V721 BLANK WELDED ON DRILL 30 HOLES .250 DIA 10 ROWS OF 3, STAGGERED AS SHOWN 1.000 .750 2.500 3.000 15.000 2.000 .375 .750 .375 EXHAUST HOT SPOT SILENCER. WELD WHERE MARKED 'A'. MATERIAL: SHEET STEEL 16 S.W.G. SILENCER TO BE LAGGED IN NORMAL MANNER. 1.125R .750DIA 1.500 F.W.S. 17-10-29 | ||