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).
Drawing detailing modifications to Resonance Silencer E.58690 for the 20/25 HP model.
| Identifier | ExFiles\Box 104\2\ scan0065 | |
| Date | 19th October 1932 | |
| 20/25 H.P MODIFICATIONS TO RESONANCE SILENCER E.58690 (Le C. 3158) (DIMENSIONS NOT SHEWN AS ON E.58690) BAFFLE E.58684. BAFFLES E.58688, BUT WITH 6 HOLES 1/4" DIA. DRILLED IN A CIRCLE EQUALLY SPACED. BAFFLES E.58684 BUT DRILLED ONLY WITH INNER RING OF 1/4" DIA. HOLES. BAFFLE E.58688 THIS DIMENSION ALTERED FROM 18.00" DRILLING OF CENTRAL PIPE ALTERED TO SUIT NEW POSITION OF BAFFLE. N.B. BAFFLES TO BE FIXED TO CENTRAL TUBE, & TO BE .020 SMALLER IN DIAM. THAN THE SHELL; i.e. TO BE SUFFICIENTLY FREE TO PREVENT CONTRACTION NOISES, & NOT LOOSE ENOUGH TO RATTLE. [Stamp:] ROLLS-ROYCE, LTD. PRINT ROOM OCT 19 1932 DERBY. | ||