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).
Notes on the assembly of the EAC Spring Drive and Slipper Wheel.
| Identifier | ExFiles\Box 65\4\ scan0237 | |
| Date | 1st January 1925 | |
| R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs{Lord Ernest Hives - Chair}/ACL/LGS1.1.25. NOTES ON THE EAC. SPRING DRIVE AND SLIPPER WHEEL. For assembly of this unit, see the arrangement drawing E.71202. It is important that the notes on this drawing are observed. The following notes however are given in addition to those on the drawing :- DRIVING SPRINGS. E.72864. No difficulty should be experienced in fitting these springs if they are first compressed in a suitable pair of grips and the Spring Cage E.72867 turned in the required direction in relation to the Driving Dogs E.70787 by means of a couple of bolts - one in one of the holes in each member - and sprung apart by a small bar. The springs should fit correctly in the recesses provided in the Driving Dogs. It is assumed that before fitting, the springs have been examined by Inspection Dept. for load and deflection as per instructions on Drg.E.72864. DAMPING SPRINGS AND DAMPER FRICTION DISCS. When the damping springs E.71175 are in position, the Presser Plate E.71865 must be in a free sliding fit on its Pins E.71176 without any slack, as stated in Note 8. on drawing. The washers E.70816 must have their faces oiled before fitting. They should be perfectly free from any grit When built up without the Driving Springs E.72864 in position (but, of course, with the damping springs), the load required to slip at a radius of 17¼" is approx. 2¼ lbs. contd :- | ||