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).
Results of tests investigating the reversal of water flow in an engine under three different configurations.
| Identifier | ExFiles\Box 179\2\ img024 | |
| Date | 8th December 1931 | |
| RESULTS OF TESTS. These tests were carried out as follows :- (1) With standard horn pipes and top water rails, a very violent reversal of flow occurred at 1600 R.P.M. (2) With 13/16" dia. restriction washers between horn pipes and cylinder block, a violent reversal of flow occurred at 1500 R.P.M. (3) With restriction washers as in (2), large dia. outlet elbows and top water rails with 3/4" dia. outlets from centre of cylinder block, the reversal occurred at 1600 R.P.M. and was very gentle in action and short in duration. The pressures and temperatures recorded were :- Test. RPM. Water Temperatures Press. at In. Horn pipe Press. Cyl B. Press. Speed of Rev. Nature of Rev. Inlet. Outlet. Hdr.T. lbs. per Sq. in. (1) 2250. 100°C. 100°C. 100°C. .65 12 10-11 1600 V.Violent (2) 2250 100 100 100 1.6 13 10-11 1500 Violent (3) 2250 100 100 100 .65 12 7 1600 Slow. Condition (3) represents the two-piece cylinder engine fitted with the recommendations made for evaporatively cooled 'Kestrel' engines. SUMMARY. When applied to the detachable head 'Kestrel' engine, the recommendations made for the standard 'Kestrel' engine running evaporatively cooled, do not seem to be as efficacious in reducing the speed at which reversal of water flow occurs. Hs{Lord Ernest Hives - Chair}/G.Parkin. | ||