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).
With a sketch requesting further tests on the oil pumping capacity of screw threads.
| Identifier | ExFiles\Box 94\1\ scan0166 | |
| Date | 15th August 1935 | |
| To W. Bell. From Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer} γ328 Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}10/MJ.15.8.35. Will you please carry out some further tests on the oil pumping capacity on screw threads. The type of thread which we want tested is shown in the sketch below - DIAMETRAL CLEARANCE TO BE BETWEEN 0.005 AND 0.006 1.400 DIA 1.600 EFFECTIVE LENGTH 1 START 0.100 0.150 0.050 ENLARGED VIEW OF THREAD. Hs{Lord Ernest Hives - Chair}/F.J. Hardy. | ||