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).
Cooling tests conducted on the Goshawk II engine, detailing water loss at full power with boiling coolant.
| Identifier | WestWitteringFiles\I\May1922\ Scan134 | |
| Date | 1st May 1922 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to GJ. c. to S. c. to Da.{Bernard Day - Chassis Design} c. to HY.{Tom Haldenby - Plant Engineer} c. to Hy.{Tom Haldenby - Plant Engineer} (Laval). ORIGINAL Hsd/TSL.5.22. One for x1751 " " + x766. x1751 / x766 x4240 RE. GOSHAWK II -- COOLING. We have taken further tests on the Goshawk engine on the bench. We have run the engine at 1000 R.P.M. full power until the water boiled and then run on for a further half hour full power with the water boiling, and taken a record of the power developed during that time. We found that the power remained constant, throughout the half hour's running with the water boiling. The total loss of water was 5 1/2 quarts. Of that amount, we collected 2 quarts as water, the rest was dissipated in steam. During the test the fan was operating. The average rate of air through the radiator was 360 ft. per min. After this we repeated the test running the engine at at 2000 R.P.M. full power. Throughout the half hour's running with the water boiling, the HP. did not vary in the least. At the finish we had lost 8 quarts of water, 2.5 quarts of which we had collected as water and the rest had dissipated in steam. We examined how the water was circulating after the 2 galls. had been lost. We found that the pump was circulating but the flow was intermittent. The average rate of flow of air through the radiator during this test was 220 ft. per min. The temperature in the test house was 24°C. We consider that the results of this test show there is very little we can do to improve the circulation | ||