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).
Showing graphs of carburettor mixture control positions against engine R.P.M.
| Identifier | ExFiles\Box 66a\1\ scan0077 | |
| Date | 12th June 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF: Hs{Lord Ernest Hives - Chair}/ACL/LG261125 Top Graph: POSITION OF CONTROL REQUIRED TO GIVE CORRECT MIXTURE WHEN JET SET TOO EARLY. POSITION OF MIXTURE CONTROL NOTCHES WEAK NOTCHES RICH R.P.M. AIR VALVE STARTS TO LIFT AIR PORTS OPEN RANGE OF MIX. CONTROL. Text in middle: The following diagram shows what results should be obtained if the carburetter is made and adjusted correctly :- Bottom Graph: CURVE SHOWING POSITION OF MIXTURE CONTROL TO GIVE CORRECT MIXTURE POSN OF MIX. CONTROL. NOTCHES WEAK NOTCHES RICH LIGHT LOADS FULL LOAD R.P.M. | ||