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).
List of points to observe for the setup and operation of a flywheel vibrations test rig.
| Identifier | ExFiles\Box 137\4\ scan0076 | |
| Date | 15th January 1930 | |
| Hs.{Lord Ernest Hives - Chair} x634. Rg{Mr Rowledge}/Tsnl/LW.15. 1. 30. FLYWHEEL VIBRATIONS RIG Points which ought to be observed during the rigging up of this are:- (1) Check end play in 20 H.P. crankshaft, which should not be excessive. (2) Remove all parts of 20 H.P. engine except crankshaft, pistons and rods and drive to oil pump. Block up oil pipes to camshaft and overhead valve gear. Piston rings could be removed if any difficulty is experienced in driving the 20 H.P. engine. Remove cylinder head. The block will want bolting down really rigidly, making use of all the studs. (3) H-7-W unit has E.54701 crankshaft; stiffness approximately 27,400 lbs/ft. per radian; torsional period 4,150 r.p.m. (4) Using second gear in gearbox the rear engine does 1,630 r.p.m. for 1,000 r.p.m. on the Phantom engine. The Hasler reading on the dynamo drive of the Phantom would be 1,500. Therefore, rear engine r.p.m. will be 1.087 times the Hasler reading. (5) The Phantom engine throttle should be controllable from the back of the 20 H.P. engine. (6) The two 20 H.P. engine bearer bars have been left long so as to be adjustable for length. This is because we believe the rigidity of engine mounting may be found to affect the frequency of vibration of the flywheel. (7) We might consider it worth while during the tests to make a gadget to bolt on to the gearbox flange of the 20 H.P. engine all round the flywheel to show amplitude of vibration. This is not easy to measure with the Rotorscope. contd. | ||