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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).
The preparation of the 98-NK car for a 10,000-mile test in France, focusing on new front springs, radiator, and tyres.

Identifier  WestWitteringFiles\M\2October1924-December1924\  Scan64
Date  20th October 1924
  
R.R. 403a (20H) (D.A. 853 20-3-24) J.R.D.

ORIGINAL
Expl. No.
REF: Hs{Lord Ernest Hives - Chair}2/LG20.10.24.

EXPERIMENTAL REPORT.

To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair}
c. to CJ. BJ.
c. to E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design}
c. to EY. Wor.{Arthur Wormald - General Works Manager}

10,000 MILES TEST IN FRANCE. 49941 49410
98-NK CAR.

This car is being prepared to send to France to run a 10,000 miles test on front springs. It has already completed 20,000 miles running in France and 2,000 or 3,000 miles running in England.

The following new parts are fitted to this car :-

1. Firths road springs (front) thin leaf 12½% stiffer than standard.
A pair of Woodheads springs of similar poundage will be carried as spares so that if the bumping tests show the Firths springs not to be up to the standard of Woodheads, they can be changed.

2. Radiator with 23¾" matrix.
It was decided that a 23¾" matrix was the largest radiator it was practicable to fit to a 40/50 HP. chassis. This gives us practically a square radiator so that the fan can be efficiently used.
We also have prepared for this car a radiator with a 22¾" matrix. This size of radiator could be fitted to the present standard cars without any alteration, by carrying the matrix 1" lower.
Two spare sides for the bonnet are being carried fitted with louvres.

3. Low pressure tyres and wheels.
A set of low pressure tyres and wheels are being sent

CONTRI-
  
  


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