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).
Modifications to the Phantom III front brakes to resolve a clearance issue.
| Identifier | ExFiles\Box 92\4\ scan0175 | |
| Date | 8th April 1936 | |
| 1356 To BY.{R.W. Bailey - Chief Engineer} Copy to Ba. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} RHO. N/H Hollingworth. R/Ev.{Ivan Evernden - coachwork}1/MN.8.4.36. R M MARTINDALE Phantom III Front Brakes. With the latest yoke piece a foul has been experienced between the boss and nut of the bell crank lever on the yoke piece and the inner brake carrier plate, in spite of the reduced diameter of lever boss and shortened length of bearing. By lowering the lever fulcrum .1" there is a rapid gain in the clearance. The method of dealing with this matter was discussed between BY and Da{Bernard Day - Chassis Design} this morning, and the following procedure generally agreed to :- For those yoke pieces already machined the lever fulcrum can be dropped .1" by the use of an eccentric fitting, whereby the fulcrum pin is .1" out of centre with the taper shank - see N.Sch.4794 herewith. To deal with the complaint that the end washer sits on very meagre milled flats around its square hole, we have replaced this washer by a taper seated washer, also using the quarter castle nut in the place of the present .312 . This scheme should be used universally in future. After existing forgings have been used up we suggest that the boss for this fulcrum be elongated downwards by .1", by a slight modification to the dies, and the centre of the fulcrum lowered by this amount. Ev.{Ivan Evernden - coachwork} Att: N.Sch.4794. | ||