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 'India' 4-speed gearbox.
| Identifier | ExFiles\Box 6\4\ 04-page093 | |
| Date | 25th September 1934 | |
| H.R. 493a (New) (D.D. 175 25-9-34) J.H.D. y5310 EXPERIMENTAL REPORT. Exptl. No. REF. Hs{Lord Ernest Hives - Chair}1/LG6.3.25. 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} BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} AJS. S E C R E T. 'INDIA' - 4-SPEED GEARBOX. y5320 We have carried out further tests with this gearbox and so far we have not had a single instance of the gears attempting to work out when using torsionally free pinions. Our tests have been carried out with two different sets of these pinions, but they have both been tried in the same gearbox because at the moment we have only one of these 4-speed boxes available. We have tried running with the gear half out of mesh in order to prove whether there was a tendency for the gear to work into mesh. We found, if we ran with the gear half out of mesh, it would then tend to work out. Examination of the gear teeth after this test shewed that they had been damaged due to this treatment. Our object in making the test was to prove whether the reason for it staying in, was due to the gear working inwards, instead of outwards. We expect to have on test tomorrow the different angle of splines. We shall test these in conjunction with the solid pinion in order to be able to say whether they are any advantage in holding the gears in position. Hs.{Lord Ernest Hives - Chair} | ||