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).
Test report on a Phantom III No.5 Gearbox after modifications to core angles and fitting new ball races.
| Identifier | ExFiles\Box 94\1\ scan0342 | |
| Date | 24th February 1936 | |
| X 328 To R.H.C. c. to R.H.C/H.P.S. c. to H.S. Ha/GWH.{George W. Hancock - Head Chateauroux}15/JH. 24.2.36. Phantom III No.5 Gearbox. This box tested after reducing angle of top core .004" and third core .002". New ball races fitted to first motion shaft. Gears. 1st. Still on the heavy side, over-run more pronounced. 2nd. Light forward, heavy over-run. 3rd. Light note forward and over-run. Continuous gears. Quiet, no improvement in ball race noise. Synchromesh. 2nd. Smooth action. 3rd. Improved, smoother action, not so lumpy. 4th. Improved, was free from crashing. C.W.Oil. Ha/C.W.Hancock. | ||