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).
Pressure, speed, and torsion testing for welded tubes and shafts, and a discussion on needle joint clearances.
| Identifier | ExFiles\Box 159\7\ scan0197 | |
| Date | 4th March 1938 | |
| -2- Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} 3/MH. {M. Huckerby} 4.3.38. Every length of welded tube is pressure tested to 2000 lbs/sq.in. Every complete shaft is run up to maximum speed on a flexible mounting and is scrapped above a small out of truth. Every shaft is twisted 10° and must take no permanent set. Every shaft is balanced on a Trebel machine. Daniell still insists on the necessity in the needle joints of 1/2 of a roller slack, adequate diametrical clearance and more than .050 roller end clearance. Judging by results here he is right and our joints are wrong. Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} | ||