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).
Photograph showing the disassembled components of a Merlin Appendix 2 Speed Supercharger.
| Identifier | ExFiles\Box 132\2\ scan0105 | |
| Date | 1st March 1940 | |
| MERLIN APPENDIX 2 SPEED SUPERCHARGER NEG. No 5652 D MAR 1940 | ||