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).
Diagram showing fuel levels in front and rear float chambers under different flow conditions.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan111 | |
| Date | 16th April 1928 guessed | |
| DIAGM. SHEWING HOW LEVEL IN FRONT CHAMBER IS HIGHER THAN IN REAR TENDING TO HOLD UP FLOAT .840 LEVEL IN FRONT CHAMBER FUEL FLOWING OVER PARTITION & HOLDING UP FRONT FLOAT PARTING SURFACE 1.580. LEVEL IN REAR CHAMBER BORE OF VALVE SEAT .344. NEEDLE ADJ. TO GIVE A MAX LIFT OF .150" WITH THIS ADJ THE LEVEL (STATIC) WAS NATURALLY TOO HIGH FLOW FROM DIFFUSER CAPS RESTRICTED TO ALLOW 400 PTS/HR REPRESENTING PROBABLE MAX CONSUMPTION EFFECT OF PIPE CONNECTING THE TWO FLOAT CHAMBERS PARTING SURFACE 1.140. LEVEL IN BOTH FLOAT CHAMBERS THE SAME LEVEL FALLS LESS THAN IN ABOVE CASE. PIPE OF LARGE BORE JOINING FRONT & REAR CHAMBERS TAP ADJ. TO GIVE 400 PTS/HR WRS | ||