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).
Flywheel washers, friction load checking, and spring drive fitting.
Identifier | ExFiles\Box 65\4\ scan0238 | |
Date | 31th January 1925 | |
R.R. 493A (50n) (D.B. 175 25-9-24) J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. REF: Hs{Lord Ernest Hives - Chair}/ACL/LG31.1.25. FLYWHEEL WASHERS. E.70792. These are made of Continental Bakelite - the same as for the Damper Washers. They should have a slight chamfer on each side of its inner circumference to assist in maintaining an oil film between the washers. When assembling these washers, they must be free from grit and both surfaces oiled. The flywheel springs E.1721 must be screwed up choc-o-bloc and then un-screwed 3/4 of a turn. After nuts have been locked and split pinned, the load required to overcome the friction should be 20 lbs. at a radius of 17¼". It is important, in order to obtain smooth and consistent action, that each bolt is un-screwed from the choc-o-bloc position by the same amount. CHECKING LOAD TO OVERCOME FRICTION. The load required to slip the flywheels can be conveniently tested by reading the load on a spring balance pulling at the end of an arm attached to the flywheel and working at a radius of 17¼". The unit should be held by the crankshaft pinion. When slipping the load should read 20 lbs. and it is important that the load should be consistent. FITTING SPRING DRIVE. See note on drawing re. taper on the Crankshaft. When fitting the Spring Drive in position the key contd :- | ||