Rolls-Royce Archives
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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).
Proposal to change the material for front road springs from Chrome Vanadium to Silico Manganese steel.

Identifier  ExFiles\Box 43\2\  Scan226
Date  3rd October 1927
  
RR 755 REVISED (10H) (DE 648 9-12-26) BM. 2/1187.
X3900.
STANDARDISATION of CHASSIS PARTS.
Description of Parts. MATERIAL FOR FRONT ROAD SPRINGS.
Origin. To improve reliability and reduce cost.

Experimental Test Report.
It is proposed to use Silico Manganese steel in place of Chrome Vanadium. All road springs on pre-war cars were made in this material. U.S.A. springs are also made in this steel.

Road Test Report.
Comparative tests on the bumping test shew that springs made in this material give a longer average life than the present ones.

X No. 8410 5410
Drawing No. 3900
Part List

A Scrap and replace at all costs, including Chassis already delivered to Customers.
B Scrap and replace on Chassis in Works.
C Scrap present stock and replace on all Chassis not yet handed to test.
D Use existing stock Alteration effective on future Chassis.

INITIAL DATE REMARKS
BJ. Completed sheet sent out. sheet not returned from BJ. Hs{Lord Ernest Hives - Chair}/e.{Mr Elliott - Chief Engineer}
R.{Sir Henry Royce} 4.10.27 Perhaps the longer life of the American springs is due to the use of thinner plates, rather than other items of design or materials. Can we confirm this easily.
WOR.{Arthur Wormald - General Works Manager} 4.10.27 Agreed. Wor.{Arthur Wormald - General Works Manager} URGENT.
RG.{Mr Rowledge} 7.10.27 Agreed. RG.{Mr Rowledge}
DA.{Bernard Day - Chassis Design} 8.10.27 Agreed. Da.{Bernard Day - Chassis Design}
BY.{R.W. Bailey - Chief Engineer} 4.10.27 Agreed. BY.{R.W. Bailey - Chief Engineer}
EP.{G. Eric Platford - Chief Quality Engineer} 4/10/27 Agreed EP{G. Eric Platford - Chief Quality Engineer}
E.{Mr Elliott - Chief Engineer} 8.10.27 Agreed. E.{Mr Elliott - Chief Engineer}
PN.{Mr Northey}
CWB. 10.10.27 Agreed. CWB.
Hs.{Lord Ernest Hives - Chair} 3.10.27 Agreed. Hs.{Lord Ernest Hives - Chair}
  
  


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