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).
Mr. Royce's feedback on proposals for crankshaft and piston testing apparatus.
| Identifier | ExFiles\Box 42\2\ Scan048 | |
| Date | 26th July 1918 | |
| X.3289 R.R. 226 a (400 T) (S.C. 532. 18-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. To DA.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} c. to EY. c. to EH c. to EFC. X.3294. RE CRANKSHAFT AND PISTON TESTING X..3289 With reference to the above, would you kindly note that Mr. Royce has inspected the last proposals you have sent to him for obtaining an alternating torsion test on a crankshaft, in conjunction with an alternating pressure test on a piston. He thinks that to make an apparatus requiring the least possible tackle which will obtained quickly and not use up many man hours, and at the same time give the requisite results, we should utilize the oil pressure in one or more of the working cylinders of the engine itself, or special cylinders made for the purpose, attached to a complete crankcase (that is, top and bottom halves bolted together) with the crankshaft anchored at one end by suitable attachment to the flange which carries the epicyclic reduction gear. The test as first proposed, required a specially long cylinder, which would take a standard piston on the end of the piston rod, connected to a cross-head guide secured to the crankshaft by a standard connecting rod. The piston rod was intended to work through a cover having a packing gland, so that pressure could be applied to the underside of the piston. It is most important to get rid of the whole of the air from the working cylinder, and with this object in view, the cylinder was arranged in a horizontal position, Contd. | ||