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 of B.HP and induction depression versus R.P.M. for two different carburettor choke sizes on a standard camshaft.
| Identifier | ExFiles\Box 121\2\ scan0162 | |
| Date | 23th October 1934 guessed | |
| DEPRESSION WITH VARIOUS CHOKE SIZES RH.{R. Hollingworth} P28 P1 STANDARD CAMSHAFT VALVE LIFT .480 VALVE TIMING DIAGRAM: 7.5 IN 55 EX 51 .013 CLCE TABLE: CARBURETTER: R.R. C.H. A CHOKE DIA: 1.40 DIFFUSER AREA: .28 ☐" FREE AREA THROUGH CHOKE: 1.25 ☐" CARBURETTER: HAWK C.H. B CHOKE DIA: 1.10 DIFFUSER AREA: .177 ☐" FREE AREA THROUGH CHOKE: .77 ☐" THROTTLE BARREL: 1.4 AXES: Left Y-Axis: B.H.P. Right Y-Axis: INDUCTION DEPN. INS. HG. X-Axis: R P M CURVES: A, B | ||