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).
Comparison of Vacuum Units from Weymann & Co. of Paris with English Autovacs for the Goshawk.
| Identifier | ExFiles\Box 40\3\ Scan018 | |
| Date | 3rd July 1922 | |
| Hs.{Lord Ernest Hives - Chair} from ROY.{Sir Henry Royce} /3693 ROY{Sir Henry Royce}/Dnl{Mr Dunwel}1/HP3.7.22 We send you herewith 3 sets of Vacuum Units (no tanks) supplied by Messrs. Weymann & Co. of Paris. These are for comparison with the English Autovacs which we are employing on the Goshawk. We shall be glad to have your remarks in due course. ROY.{Sir Henry Royce} | ||