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).
The effect of suction chamber holes on delivery, pump lag, and injection period, including a data table.
| Identifier | ExFiles\Box 179b\3\ img096 | |
| Date | 1st February 1933 | |
| -6- HR/Atd.6/AUR.2.33 contd. EFFECT OF SUCTION CHAMBER HOLES ON DELIVERY, PUMP LAG AND INJECTION PERIOD. DELIVERY. Except where otherwise stated, the delivery-speed curves were taken at maximum injection, for reasons outlined in previous report, under standard conditions stated above. The spill was also measured. In Table 2 are set out the details relating to these delivery curves. TABLE 2. Delivery characteristics. Various suction chamber holes unplugged. Posn. of hole Fig. No. Discharge at max. injection ccs/cycle Spill at max. injection ccs/cycle Discharge plus spill ccs/cycle Theoretical Discharge ccs/cycle. 1000 R.P.M. 6 holes 2 .441 .079 .520 .462 No. 1 open 5 .430 .069 .499 .462 " 2 " 13 .448 .046 .494 .462 " 3 " 10 .441 .047 .488 .462 " 4 " 17 .441 .043 .484 .462 Nos. 2 & 5 " 14 .444 .041 .485 .462 336 R.P.M. 6 holes . .425 .114 .539 No. 1 open . .394 .099 .493 Discharge " 2 " . .422 .061 .483 Theoret- " 3 " . .426 .058 .484 ically " 4 " . .421 .055 .476 discon- Nos. 2 & 5 " . .429 .053 .482 tinuous. | ||