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).
Napier valve springs, detailing measurements of length and weight for both exhaust and inlet springs.
| Identifier | ExFiles\Box 80\3\ scan0144 | |
| Date | 28th February 1913 | |
| R.R. 238 (24 B) (LL. 512. 20.8.12) F.P. 2350. ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Mr Wormald Order No. Sheets PW/SM9/L28213 & Mr Elliotts sheets ero 7594 & 10149. Customer's No. Report on Napier Valve Springs Cyl no. Exhaust Springs Length of Spring (Valve open) Length Valve closed 6. 2.670" 3.090" 5. 2.700" 3.140" 4. 2.680" 3.095" 3. 2.680" 3.100" 2. 2.675" 3.095" 1. 2.685" 3.125" Average of above Readings 2.681" 3.109" Weight given in lbs Weight on spring. Valve open. 58.375. Weight do. Valve closed. 38.000. Inlet Springs Length of Spring (Valve open) Length (Valve closed) 2.680" 3.065" 2.740" 3.095" 2.715" 3.085" 2.760" 3.045" 2.690" 3.055" 2.685" 3.060" 2.709" 3.068" Weight on spring. Valve open. 56.875 Weight do. valve closed. 40.375. Contd. Signed This Sheet must be filed on completion of the work. | ||