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).
With sketch and handwritten notes proposing modifications to a single valve air pump.
| Identifier | WestWitteringFiles\A\August1917\ Scan10 | |
| Date | 27th August 1918 | |
| -2- Re - Single Valve Air Pump. arranged as to be less liable to damage - This might be done by screwing it or otherwise fixing it to the valve stop- See sketch herewith:- Handwritten notes: (1) Conical spring (2) Non corrosive metal (3) Spring carried by union as on R.R. carburettor air valve turned into recess. (4) increase dia of upper part of stop and drill cross holes & improve delivery [Signature] X8130 | ||