Technical data page 2

Second series of 4 8 0(240 P 1 to 240 P 25)

Evolution of his first 480, those were in fact deeply redesigned (not only aesthetically) to incorporate the latest work of Chapelon on thermodynamics and using his full mathematical engine modelling method. They also used "refinements" unusual here such as mechanical firing, even roller bearings on driving axles, driving and coupling cranks on some units (Union Pacific type coupling rods).

The 160 A 1, 6 cylinders 2 12 0 prototype

To load a 2580 X 780 version of  this drawing, click on it. (.gif file, 84K)

242 A 1, three cylinders 4 8 4

To load a 1800 X 2329 version of  this drawing, click on it. (.gif file, 135K)

2196 X 880 version of  this drawing of a Willoteaux' slide valve. (.gif file, 44K)

141 E 113 MIKADO, first two cylinders single expansion Chapelon engine. Many diagrams used here are extracts of: "La Revue Générale des Chemins de Fer" also called R.G.C.F., november 1949.

Iindicator diagrams of the original machine Chapelon used as a basis and those of E113, I think they are significant. Also included on the graph is the "ideal diagram" of the engine. Full english legend on the large version!- I didn't mentionned before that EVERY locomotive Chapelon has been "allowed" to build used wheels and chassis parts scrapped from other engines, the only exceptions to this rule being 35 new PACIFICS (there were not enough "scrap" to satisfy orders!!) build for "La compagnie du Nord" and the narrow gauge locomotives for South America.

Part of steam circuit Section Increase in % Respect to original engines.
Regulator  246 sq. cm.  + 46% 
Piping between regulator & superheater  214 sq. cm.  + 19% 
Superheater elements "go" circuit  364  + 101% 
Superheater elements "back" circuit  211 sq. cm.  + 17%
Regulator to cylinders pipes  290 sq. cm.  + 88% 
Cylinder inlet flange  284 sq. cm.  + 84% 
Inlet tract (distributor to cylinder)  390 sq. cm.  + 56% 
Cylinder exhaust flange  453 sq. cm.  + 44% 

Diagram of ports opening - Original vs. Chapelon

As usual, click on the thing for a large version.

Power curves measured on the dyno of Vitry sur Seine for various gears.

Compared coal and water consumptions: Standard 141 C serie engine Vs. Chapelon's 141 E 113

  141 C 190 141 E 113 Savings induced by transformation
Normal train hauling:      
Water consumption in gallons (litres) per H.P. per hour  (13.25)  (10.25) 22.6%
Coal consumption in lbs. (kilograms)  per H.P. per hour (1.95)  (1.5) 23.1%
Shortened timing (called "accelerated trains" down here)      
Water consumption in gallons (litres) per H.P. per hour  (12.9)  (9.8)  24%
Coal consumption in lbs. (kilograms)  per H.P. per hour  (2.8)  (1.5) 27.9%

To be continued...

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