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).
Hand-drawn diagram illustrating the working principle of a 'hiveso' fuel gauge system.
| Identifier | ExFiles\Box 44\2\ Scan063 | |
| Date | 28th March 1927 | |
| hiveso Fuel gauge Pressure gauge, practically an aneroid. B. is setting button for needle Air pressure produced by spring A depresses fuel column in stand pipe and escapes from bottom of pipe as shown ⅛" brass pipe non-return valve apparently to prevent fuel entering air pipes. Oy Mar 28 / 27. | ||