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).
Graph comparing the power output of balanced and unbalanced twin carburettor configurations.
| Identifier | Morton\M9\ img050 | |
| Date | 2nd October 1931 guessed | |
| COMPARISON OF POWER OUTPUT BALANCED & UNBALANCED TWIN CARBS. STANDARD CAMSHAFT. VALVE LIFT .480 STANDARD HEAD. 4.78 C.R. TWIN CARBS 1.4 CHOKES RM.{William Robotham - Chief Engineer} P.30 B.H.P B.M.E.P R.P.M. Valve Timing Diagram: EX SI IN .013 CL'CE 7.5 55 Graph Legend: NORMAL TWIN CARBS TWIN CARBS HAVING 2" EXTENSION CARRYING A BALANCING HOLE OF .625 D' | ||