Rolls-Royce Archives
         « Prev  Box Series  Next »        

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 modifications for the 'Z' series car and the next car scheduled for testing in France.

Identifier  ExFiles\Box 69\3\  scan0326
Date  6th October 1925
  
To BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce}
c. to CJ. BJ. DA.{Bernard Day - Chassis Design}

X8770

R1/M6.10.25.

PHANTOM FRAME ETC.

MODIFICATIONS FOR 'Z' SERIES AND NEXT
X. 8770
CAR FOR TEST IN FRANCE.
X. 8940a

The following modifications should be on the next car to run in France, and the production arranged for these modifications at once :-

(1) STEERING.
Toe-in should be avoided - i.e. parallel wheels in plan.

(2) Center point steering should be altered to 1" out, but the king post should be as near centre line of wheels as possible, and wheel should be upright so that there is no need of toe-in, but about 1º should be left for slacks, so that the human eye should not think the axle has given way.

(3) Axle and hub parts should be machined so that the parts are to the dimensions shewn on the drawing. Stub axles are also heavier: further lightening has been instructed for test.

(4) The brake carrier should be an alum. casting and duralumin sheet.

(5) Damping friction should be as follows :- both pivots simple plain thrusts, and ball joints in cross steering tube should have springs at each end, thrusting balls outwards. Wear will result in toe-in but adjustment is made on the outside so that this can be corrected. These springs might help to reduce the max. stress on the cross steering tube, and prevent rattles.

(6) Instrument board with metallic panel N.sch.1808/2027.

(7) Shutter & mixture controls N.schs. 2035/6.

(8) Petrol tank with 2-level device and larger filler - N.schs. 2059/60.

(9) Wheel carrier (2 designs) N.schs. 2015 and 2023.

(10) Revised seating for 'C' and 'D' steering with pedals nearer dash. N.sch.1741.

(11) Luggage carrier (tubular type) Ns.{Norman Scott}ch.2028.

(12) Body subframe N.sch.1864/5/6/9. 1925.1936. 2001. 2022.
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙