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).
Results of deflection tests on a flexible flywheel.
| Identifier | ExFiles\Box 129\4\ scan0288 | |
| Date | 7th September 1938 | |
| Rm{William Robotham - Chief Engineer} 1110 7.9.38. DEFLECTION TESTS ON FLEXIBLE FLYWHEEL. We have now made two flexible discs which differ in thickness, and have carried out tests to determine how the deflection varies with the thickness of the disc - (a) With a twist load, in which a weight is suspended from one side only. (b) A vertical load applied uniformly round the rim, and acting parallel to the shaft. The results are shown on curve Rm.{William Robotham - Chief Engineer}556 herewith. It will be noted that the disc is held rigidly both at its inner and outer diameter, and that the flywheel may be regarded as almost infinitely rigid in relation to the disc. The deflection follows a straight line law and the individual readings plot very accurately on a straight line. From the two discs tested it would appear that the stiffness in twist varies as the cube of the mean thickness but when deflected as a Belville washer, as the fifth power, and although only two different discs were tested, it appears that the above laws hold good for the small deflection observed. Rm{William Robotham - Chief Engineer}/NRC.{N. R. Chandler} [Signature] | ||