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 the dimensions of a larger banjo used on petrol flow tests, supplied with Zenith petrol filters.
| Identifier | ExFiles\Box 13\3\ 03-page139 | |
| Date | 7th November 1929 | |
| Hs{Lord Ernest Hives - Chair} 244 1-11-29 .400 DIA .312 DIA .675 DIA .480 DIA .280 .480 .120 .500 .775 DIA of UNDERCUT .440 DIA .950 DIA DIMENSIONS OF LARGER BANJO USED ON PETROL FLOW TESTS - S.S. SUPPLIED WITH ZENITH PETROL FILTERS 7 NOV 1929 | ||