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 conducted on an obsolete 'India' gearbox to diagnose a gear disengagement fault.
| Identifier | ExFiles\Box 6\4\ 04-page105 | |
| Date | 20th March 1925 | |
| EXPERIMENTAL REPORT. Expt. No. X5310 REF HS{Lord Ernest Hives - Chair}3/LG20.3.25. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} AJS. c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} S E C R E T. 'INDIA' GEARBOX. We have taken an obsolete 'India' gearbox and cut away the section of the box so that we could watch the 1st. and 2nd. speed pinions. We drove the 1st. motion shaft by means of a belt from the line shaft. The gearbox was fitted up with only side shaft gears and the 1st. speed pinion and wheel - no selector forks were fitted. The 1st. speed pinion was one of the torsionally free type without the second speed screwed to it. We find that with these two simple gears running together, the gear worked out of mesh. It only required a very light braking effort to cause this. We reversed the direction of rotation but it still continued to work out of gear. We took the 1st. speed pinion off the shaft and turned it end for end and put it on again, and carried out the test again. The same thing happened; the gear worked out whatever the direction of rotation. We also carried out a test by arranging that the large wheel of the 1st. speed could slide freely on its shaft, and we fixed the small pinion. When running under this condition there was no tendency for the big wheel to move in either direction. Hs.{Lord Ernest Hives - Chair} | ||