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).
The 100-hour test of a Whittle belt for a dynamo drive on aero engines.
| Identifier | ExFiles\Box 55\2\ Scan059 | |
| Date | 3rd May 1915 | |
| From Exp. Dept. Copies to: R. {Sir Henry Royce} J. {Mr Johnson W.M.} Da. {Bernard Day - Chassis Design} Na. {Mr Nadin} Wor {Arthur Wormald - General Works Manager} /Hy {Tom Haldenby - Plant Engineer} 7/L3515. May 3rd. 1915. Re Dynamo Drive for Aero Engines. We have now tested the ¾" Whittle belt for 100 hours on 8" X 4" pulleys with 18" (about) shaft centres, the 8" pulley driving at 1500 revs. per minute. The length of the belt was 4 ft 8½" with 36 links and the weight was 1.lb 13 ozs. A load of 2½ HP was on the belt during the whole of the test, the load being applied by means of a dynamo with resistance. The belt had to be tightened to prevent slipping at 27 hours, 28 hours, and 35 hours, after which it settled down and drove without slipping until the 100 hours was completed. The belt is in good condition and fit for a lot more use. It appears to be quite stout enough to do the work which we require of it and should do it without much attention especially as the full load of 2½ HP will not be continuous. We are now arranging to try a horizontal drive with about 30" centres to see if this will run with a slacker belt and so avoid tightening up. | ||