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).
Data table for Humber Car valve contours, listing inlet and exhaust cam lift at various degrees of rotation.
| Identifier | Morton\M4.1\ img018 | |
| Date | 10th December 1920 | |
| -4- Humber Car contd:- Humber Car contours of Valves Inlet Cam. Exhaust Cam. Degrees. Lift Degrees. Lift -30 .50 80 .50 -20 .50 70 .50 -10 .50 60 .50 top 50 .501 0 .502 40 .513 +10 .509 30 .531 +24 .524 20 .556 +30 .546 10 .588 +40 .575 B.D.P .624 +50 .613 0 .673 +60 .662 10 .724 +70 .722 20 .780 +80 .773 30 .807 +90 .805 40 .814 +100 .817 50 .814 +110 .818 60 .814 +120 .816 70 .814 +130 .799 80 .814 +140 .759 90 .814 +150 .697 100 .813 +160 .638 110 .812 +170 .593 120 .792 B.D.P. 130 .754 +180 .557 140 .690 +190 .532 150 .631 +200 .516 160 .585 +210 .506 170 .551 +220 .502 T.D.P. +230 .502 180 .525 +240 .503 190 .510 +250 .503 200 .502 210 .500 220 .500 Contd:- R.R. 286A (100) (F) (S.H. 798. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 | ||