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).
Summary of final test results comparing modifications to a standard banjo attachment, noting an increased delivery rate.
| Identifier | WestWitteringFiles\W\September1931-November1931\ Scan082 | |
| Date | 13th November 1931 | |
| (3) Hs{Lord Ernest Hives - Chair}/FmL/HS{Lord Ernest Hives - Chair}13.11.31. As a final test, test 11 was repeated with a standard banjo attachment - Test 12. The effective loss was relatively small. So far the effect of each modification has only been considered relative to the immediately preceding test. If we consider the final results (test 11) in relation to those obtained with the original setting we find that the delivery has been increased by 70 to 80 pts/hr. The most effective modification being the heavy springs, the "air bottle", increasing the suction passage, and increasing the diameter of the valve ports. W. Bell. See X7460 for points. | ||