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 detailing the design and dimensions for an exhaust silencer.
| Identifier | ExFiles\Box 92\6\ scan0191 | |
| Date | 13th August 1937 guessed | |
| 39 EX EXHAUST SILENCER, 5 ROWS OF 4 1/2" HOLES, 3.00", 1.70", 2.20", 2.20", 2.20", 2.20", 2.250", 2.20", 2.20", 2.20", 2.20", 2.60", 2.00", 26.50", 46.00", 14.50", 5.00" | ||