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).
Comparing water pump delivery and temperatures for the EAC 'V' series and 40/50 cars.
| Identifier | ExFiles\Box 66a\3\ scan0118 | |
| Date | 1st March 1925 | |
| R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}/LGS1.3.25. COMPARISON EAC. AND 40/50 CARS. | | 30 m.p.h. | 40 m.p.h. | |---|---|---| | EAC. 'V' series. | 28.8°C | 29.9°C | | 40/50 21" | 20.5°C | 25.3°C | E.A.C. WATER PUMP DELIVERY. These tests were carried out with venturi fitted in bottom water pipe of 44-PK. Standard EAC. 'V' series water system and radiator. Engine run light - water temp. 50°C - 80°C | Engine R.P.M. | Difference in levels of two limbs. | Water flow galls/min. | 40/50 flow galls/min. | |---|---|---|---| | 500 | .25" | 6.65 | 5.5 | | 750 | .65" | 10.92 | 8.3 | | 1000 | 1.30" | 15.31 | 10.5 | | 1250 | 2.00" | 19.00 | 13.0 | | 1500 | 2.90" | 22.85 | 15.0 | | 1750 | 4.10" | 27.20 | 18.0 | | 2000 | 5.30" | 30.95 | 21.0 | | 2250 | 6.60" | 34.60 | | | 2500 | 8.05" | 38.20 | | | 2750 | 10.00" | 42.50 | | Law of venturi 13.46 √h.{Arthur M. Hanbury - Head Complaints} | ||