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 New Phantom spare wheel carrier.
| Identifier | ExFiles\Box 13\5\ Spare05-page002 | |
| Date | 9th March 1926 | |
| To B.Y. from D.A. c. to C.J. L.H.S.{Lord Herbert Scott - Chair} c. to H.s. X7600 DA{Bernard Day - Chassis Design}2/M9.3.26. NEW PHANTOMCodename for PHANTOM I. SPARE WHEEL CARRIER. X.7600 X.8600 As promised we send herewith N. sch. 2158 shewing the slight modifications to the tubes of the double spare wheel carrier to push the wheel out to the dimensions now asked for by the coachbuilders. It will be seen that the only things affected are the tubes and the step iron forging. We should be glad of your remarks on these modifications from the point of view of production. We have already explained that as a result of investigation in London it appears that this modification, though not absolutely necessary from the point of view of most bodies, is desirable because of a few exceptions. It also provides for possible increases in dimensions with balloon tyres. In order to facilitate the standardisation of this, in addition to the proposed test on the bumping rig, we hope that it will be got on the EAC.8. going for a 10,000 miles test. in order to do this, though the pieces are the same, in its position on the chassis the wheel carrier will follow the engine forward. It will be noticed that this will again tend to bring the wheel inwards towards the centreof the chassis. We have therefore, in pushing the wheel out, made allowance for this reduction on EAC.8. It will also be noticed that on account of the revised seating positionson 'C' & 'D' EAC.8., the bodies with these two steerings would tend to approach the wheel if it were not pushed out the additional amount as indicated. We have also taken the opportunity of shewing on here the boa constrictor horn which is practically universally fitted and of suggesting a small fitting on one of the arms of the wheel carrier to take this horn in a standard way, and so obviate the coachbuilders having to tamper with the carrier or provide some thing unnecessarily heavy and clumsy. DA.{Bernard Day - Chassis Design} | ||