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).
Continued technical memo listing potential causes for engine misfiring and addressing a customer complaint.
Identifier | Morton\M11\ img243 | |
Date | 1st October 1919 | |
To C.J. from R.{Sir Henry Royce} -2- M4/G20/10/19 Contd. (3) Miss-firing may occur with good fuel, and insufficiently warm engine, carburettor, or pipes giving bad distribution, hence some charges are weak and others have liquid fuel (a very probable reason) See all heating pipes are working, blank off upper half of the radiator, getting the temperature of the water, leaving the cylinders as near boiling as to just miss doing so. (4) Induction pipe or other parts drawing air. (5) Too weak setting of low speed jet. (6) Faulty ignition plug (try a fresh set) (7) Too narrow gaps on battery plugs. Try .025" to .035" i.e. 1/4 of a m/m.{Mr Moon / Mr Moore} .8m/m, instead of the usual .5m/m magneto standard. Assuming everything else is in perfect order, such as good compressions, shewing pistons and valves etc. holding gas very tightly, and engine beautifully smooth and free when tested at the starting handle cold, and hot, and well lubricated with suitable oil. See all these things are right and there should be no cause for complaint. Mr. de Salamanca may have hit a very peculiar grade that requires less skill in handling. Up grades or level roads may be less trying than slight down grades. If one will be critical enough under unfavourable circumstances, one will be dissatisfied with the best machinery in existence. I do not doubt that there is reason for Mr. de Salamanca's complaints, but suggest that it is probably due to circumstances rather than type. Mr. Hives informs us that the non-trembler ignition is quite as good in respect to slow running as our older ignition. (Contd.) | ||