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).
Proposing three options to reduce the air valve lift in a semi-expanding carburetter, with a preference for the third option.
| Identifier | ExFiles\Box 178\3\ img124 | |
| Date | 1st April 1932 | |
| E.H. ) FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} ) (At Le CanadelHenry Royce's French residence.) BY.{R.W. Bailey - Chief Engineer} ) C. to SG.{Arthur F. Sidgreaves - MD} WOH. HG. R2/M29.3.32. Sent from WW. 1. 4. 32. SEMI-EXPANDING CARBURETTER. X7080. I understand that our air valve has too much lift when we take the suction from the venturi. We can do 3 things to reduce it: (1) Make the piston heavy. (2) Take the suction from below the throttle, but not in the venturi. (3) Reduce the area of the lifting piston. [handwritten: p/u CL] No. (3) seems the best, being extremely simple, if it can be done as shewn on the sketch herewith. As the piston rises the clearance might increase, so that the rise and fall followed more quickly the change of depression in the upper part of the stroke. R.{Sir Henry Royce} | ||