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 proposed modifications for the Phantom front axle.
| Identifier | WestWitteringFiles\N\2July1925-September1925\ Scan100 | |
| Date | 25th September 1925 | |
| TO ~~PY~~. FROM DA.{Bernard Day - Chassis Design} Copy to ~~CC~~. HS.{Lord Ernest Hives - Chair} ORIGINAL DA{Bernard Day - Chassis Design}2/M26. 9. 25. PHANTOM FRONT AXLE. ~~48420~~ Herewith we send N.sch: 2055. shewing the first modifications to front axle parts which Mr. Royce would like made with a view to bumping, and probably for fitting to the next 10,000 miles car. The following is a list of the modifications:- (1) The machining of the inner hub has been altered. (2) The existing axle pivot is machined slightly differently and the wheel has been set at 1º to the vertical instead of 2½º as now. The inclination of thepivot to the vertical is the same as now, but the angle between the stub axle and the pivot instead of being 81½º is 83º. We believe that these alterations can be got out of the existing pivot forging. If you find that it is not so would you kindly advise us, and we will point out where slight changes can be made to enable the existing forging to be used. (3) The pivot pin has been still further lightened, and modifications have been made to the bushes, and a plain thrust permanently substituted for the ball thrusts. (4) The brake carrier has been altered to an aluminium casting with duralumin sheet to support the camshaft and brake pivots on the inside. The wire wheel is unaltered, as is also the brake drum except that we should like the thickness made uniform all over, and we have indicated on one part of the drawing that a modification to the centre of the brake drum would give more clearance for fitting an aluminium brake carrier. The camshaft in unaltered, and so is the operating shaft on the axle, the pull rod, etc. We have examined the actual car for clearances, and as far as we can see, have done nothing which reduces existing clearances. The brake shoes are unaltered, but we shall send you a further drawing shewing how we should like them to be altered as soon as possible, in order to reduce the wear on the pivot and pins. Regarding the steering levers we shall send you some instructions as to how we should like these to be lightened, but on this drawing they are shewn unaltered except for slight cutting away of the cross steering lever on the inside, in order to clear the aluminium brake carrier. We have dealt with the lightening of the front axle itself in another memo. As we may wish to make further improvements we should be glad if you would return the original of this drawing to us as soon as you have taken off sufficient prints to enable you to carry on. RECEIVED DA.{Bernard Day - Chassis Design} | ||