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 showing two cross-section views of a Herzmark single stage AV compressor.
| Identifier | WestWitteringFiles\W\September1931-November1931\ Scan025 | |
| Date | 3rd October 1931 | |
| HERZMARK" SINGLE STAGE AV. COMPRESSOR. Nº 3095. RECEIVED PRINT ROOM 3 OCT 31 DERBY | ||