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).
Technical note discussing piston ring performance, oil consumption, and blow-by, referencing specific ring arrangements.
| Identifier | ExFiles\Box 144\3\ scan0270 | |
| Date | 12th October 1937 guessed | |
| 3. twist may give rise to groove wear in which case the damping effect is eventually lost. (b) The line contact of the ring may not be particularly good for bore wear. (d) The original 3 1/2 litre Aerolite ring arrangement gave satisfactory results & we have tried to get back to that standard and at the same time find the reason why merely increasing the bore slightly upset the oil consumption to such a degree. We are now in a position in which we know considerably more about ring performance than we did even 6 months ago, we can now go ahead with various ring arrangements more methodically instead of haphazardly trying whatever ring manufacturers had to offer. Ques 2 At the time we were doing the work on "L" section rings we had no actual means of measuring blow-by, it was noticed however that blow-by was excessive unless a plain compression ring was used above the "L" section ring. The blow-by was so bad that it caused serious loss of oil from every conceivable joint. We can however complete these tests with actual blow-by figures. Ques 3 We have no evidence as yet to prove this other than | ||