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).
Test report on modifying the radiator water flow on a Phantom model to prevent water loss.
| Identifier | ExFiles\Box 16\2\ Scan085 | |
| Date | 3rd May 1934 | |
| X 7250 To E.{Mr Elliott - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} HS{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell} 24/KW. 3.5.34. Phantom Water Flow. In order to prevent loss of water in the radiator due to splashing over the overflow pipes, a restriction was fitted in the bottom water outlet pipe from the pump. This is to LEC.3819, the bore of the restriction being .750 dia., the internal dia. of the standard pipe being 1.125 dia. These tests were carried out with a water tank in the place of the radiator so that maximum flows would be obtained and also to facilitate actual measurement of the flow. The result of the test, Hs.{Lord Ernest Hives - Chair}1387, showed that the restriction reduced the water flow by an average of 20% throughout the speed range, the maximum flow at 3500 being reduced from 59.2 galls/min. to 47.3 galls/min. The temperature rise across the engine being increased from 7°C. to 8°C. At 500 R.P.M. where the temperature rise is a maximum, the effect of the reduced flow was to increase this figure from 11.6°C. to 13.2°C. Hs{Lord Ernest Hives - Chair}/ L.H.Swindall. This modification has now successfully completed 10,000 miles on 28-EX car, and a Standardisation Sheet has been issued. | ||