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).
Accompanying two unnumbered blueprints for a P.2. resonance type silencer and swan neck.
| Identifier | ExFiles\Box 14\6\ Scan270 | |
| Date | 20th October 1932 | |
| X 7230. To Hs.{Lord Ernest Hives - Chair} E/JNR.{Charles L. Jenner}1/HP.20.10.32. P.2. Silencer. We send you herewith two unnumbered blueprints showing a large diameter resonance type silencer, and swan neck. The silencer and fish tail is suspended by swinging links. E/JNR.{Charles L. Jenner} | ||