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 Air Silencer for a S.U. 1 7/8 Carburettor.
| Identifier | ExFiles\Box 135\4\ scan0118 | |
| Date | 10th October 1931 | |
| AIR SILENCER. S.U. 1 7/8 CARB. OUTSIDE OF INTAKE .375 1.850 A B DIMENSION A NOT MORE THAN 1.500" DIMENSION B PREFERABLY NOT MORE THAN 8.000" | ||