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).
Investigative report on faulty battery ignition parts from a 20 HP Chassis GYL-61.
| Identifier | ExFiles\Box 61b\1\ scan0101 | |
| Date | 30th May 1930 | |
| X2894. COPY. WE.26. 30.5.30. X.3485. FAULTY BATTERY IGNITION PARTS X.5783. X.2894. OFF 20 HP. CHASSIS GYL-61. Re C8/Cl.9.5.30. We have examined the coil, condenser, ballast resistance and contact points off this chassis and the following is a report on their condition :- Coil. Although this passes our production test OK. we have noticed a tendency to misfire when run a number of hours. We ran the coil on 16 volts for 12 hours without any definite failure. Condenser. OK. Ballast. OK. old single type. Contact points. Surfaces in very poor condition particularly the screw point which is badly oxidised. Considerable intermittent ignition might be expected with the contact points in their present condition. We should not expect absolute failure however as reported by C. only bad misfiring at low speeds. These tungsten points have been run on a contact breaker of the old type without scrubbing action and this would account for their poor condition. We consider that wherever possible when platinum points are replaced by tungsten the contact breaker should be modified with the semi-flexible arm as on present std. With regard to the ignition coil, we are not satisfied with its bench performance and prefer before unwinding it, to carry out further more intensive test to discover any latent fault. We therefore consider the ignition failure on this chassis to be due to the bad condition of the contact points coupled with an apparent elusive fault on the coil which we shall investigate further. HEW. | ||