Rolls-Royce Archives
         « Prev  Box Series  Next »        

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 EAC and 40/50 cars, focusing on water pump delivery and flow rates.

Identifier  ExFiles\Box 66a\4\  scan0180
Date  31th March 1925
  
R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D.

-2-

Expl. No.
REF: Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}/LG31.3.25.

EXPERIMENTAL REPORT.

COMPARISON EAC. AND 40/50 CARS.

| | 30 m.p.h. | 40 m.p.h. |
|---|---|---|
| EAC. 'V' series. | 27.8°C | 29.9°C |
| 40/50 2 1/4" | 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 | .26" | 6.85 | 5.5 |
| 750 | .66" | 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}
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙