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).
Component failures and analysis, discussing issues with fibre bushes, magnets, and a returned H.T. pencil.
| Identifier | ExFiles\Box 4\5\ 05-page203 | |
| Date | 4th May 1921 guessed | |
| Contd. -2- which is typical of the majority, in that the fibre bush works loose on the laner, and binds on the pin after between 1,000 and 2,000 miles running. It is thought that this is due to the climate. In the second trouble they think that the magnets have weakened as the windings on the machines are quite alright. They are also sending a H.T. brush post off a Watford which failed in a similar way to that on the B.6 It is the first case of this kind that they have had, but it shows that the Watford is not entirely free from this defect. These results are intended to show that even if the Z.R.6 was as bad as the Watford, expense and trouble would be saved by the prompt service that would be obtained. At the same time they are covered by a three years guarantee on all Bosch machines. Attached O/B/C12.B.21. As for the breakdown on the ZR.6 the H.T. pencil returned by us, was examined by the Bosch people with the aid of a microscope. They definitely state that the breakdown was due to cracking of the insulation, probably by mishandling. There are four cracks. Three were made before finally removing the pencil, and one since. It appears that they were done after our tests, otherwise they would have developed while on test. Contd. | ||