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).
Testing different choke and venturi combinations to resolve loading issues.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page095 | |
| Date | 19th December 1932 | |
| -2- Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}6/HA.19.12.32. When using the original choke (E.100660) which has a taper of 3°-30', there is a slight loading up. We have tried a venturi to (V.1456) which has taper sides of 5°-45' and in conjunction with 1.625 diam. parallel sided throttle body there is no trace of loading up, this combination having a free area between the throttle body and the venturi of 1.29 sq. in. We still have tests to carry out to determine the most suitable size of venturi. Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell} | ||