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).
Critique of Claudel carburettor defects and piston performance, outlining areas for investigation and noting improvements from wet liners.
| Identifier | ExFiles\Box 42\3\ Scan035 | |
| Date | 12th November 1926 guessed | |
| contd :- -3- features on these Claudel designed carburetters which cannot be considered ideal. They are - cork float of an unsatisfactory shape, the bad mechanical action of the power jets, necessitating by these defects the job of redesigning when we believe that the whole will be far simpler and cleaner. The only other outstanding feature on this engine appears to be the pistons, and we shall be pleased if investigations and reports can be made as to whether these are influenced by - (1) The improved design. (2) Fuel (3) Lubricating oil. (4) The strength of the piston rings. (5) Removing the lower ring. I understand there has been a marked improvement since the advent of the wet liner, but even now a long, full load test might be stopped by gummed pistons, although we should not expect, under the conditions of ordinary flying that this phenomenon would shew itself. It will be noticed that the carburetters in the Vee have been rendered much better by the improvements made in the engine when fitting the wet liner, and reducing the crankchamber height. R.{Sir Henry Royce} | ||