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).
Tests of different fans, pulleys, and cowlings for the Goshawk II engine to improve radiator airflow and prevent boiling.
| Identifier | WestWitteringFiles\I\September1922\ Scan50 | |
| Date | 1st September 1922 | |
| To H.{Arthur M. Hanbury - Head Complaints} from Hs.{Lord Ernest Hives - Chair} c. to SJ. c. to E.{Mr Elliott - Chief Engineer} c. to De. c. to BY.{R.W. Bailey - Chief Engineer} ORIGINAL. Hs{Lord Ernest Hives - Chair}2/LGS.9.22. GOSHAWK II. RADIATOR AND FAN. (Strikethrough) X4240 X4237 We attach report of tests made on different fans, pulleys and cowling. It will be seen that with the larger diameter fan and with the larger pulley which goes with it, we are no better off as regards air speed through the radiator than we are with the present standard which has proved unsatisfactory. Using the large fan and the same pulley as we do at present gives us a considerable improvement. The chief advantage with the cowling is that instead of the air being thrown back out of the corners we get a flow of cold air through. We recommend that we use the larger fan and the present size of pulley as an immediate move. We are carrying out tests on the road to see what advantage is gained by the cowling. We have carried out tests with different degrees of the fan belt tightness and find that with a reasonable tightness of belt it is only at high engine speeds above 2,000 revs. that we get any appreciable slip. Our biggest trouble with the boiling, of course, occurs below that speed. Hs.{Lord Ernest Hives - Chair} | ||