FRENCH COMPOUND LOCOMOTIVES' HOMEPAGE



3 - 242 A 1 S.N.C.F.'s, 4-8-4 prototype: History - Technical data
 
 
 
 The locomotive having supplied some basic components of 242 A1 (wheels, axles, parts of cab, tender). As shown, it was a very disapointing single expansion three cylinders engine featuring a Renaud valve gear. The goal of the designer of this valve gear was to reach, using S.E. locomotives, expansion values as high as the ones attained with compound engines but of course the system has never worked properly, all the engines tested with this system having an efficiency lower than any ordinary single expansion workhorse...

 
 

 
 
 
 
 
 
 
 

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