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).
Drawings for a new 20HP low-stress valve spring for experimental testing and standardization.
| Identifier | WestWitteringFiles\Q\July1927-September1927\ Scan032 | |
| Date | 20th July 1927 | |
| TO DY.{F R Danby} FROM E.{Mr Elliott - Chief Engineer} C. to BJ. HS.{Lord Ernest Hives - Chair} ORIGINAL 20HP. LOW STRESS VALVE SPRING. X5060/X. We send herewith drawing LeC. 2440. shewing the above. This should be instructed for experimental test with a view to standardisation. We are not we understand experiencing much trouble with 20HP. valve springs on production, but this new spring has a better figure of merit than those at present in use, and should therefore have a larger margin of safety. At the same time we send you LeC. 2443 shewing a comparison chart for valve spring stresses based on a simple formula. We should be glad if you would send us three blueprints of this chart for use in the office, and for filing. E.{Mr Elliott - Chief Engineer} | ||