Compagnie Paul Frot 0-4-0 Locomotives in France


Class Details by Steve Llanso of Sweat House Media

Class 15 (Locobase 6225)

Data from [link] (10 July 2004). Corpet works #1667 & 1672, these tanks were used in support of public works from 1925 to 1946. The profile shows a small engine with long tanks, an outsized cab, and an even top line of two domes of equal size (steam dome ahead of sand dome) behind the very slightly flared stack.

Soon after the Chemin de Fer Baie Somme association was formed in 1971, the CFBS learned that the Plisson company, successore to P.Frot wanted to sell its steam locomotive holdings. When they viewed the engines at Troyes, it was, as the site says, like entering Ali Baba's Cave. Of the 10 locomotives, they chose 3 0-4-0Ts -- Marron, Verte, et Gris (Maroon, Green, & Grey).

Verte was the only one in service in 2004, mostly as backup to the larger CFBS locomotives.

Principal Dimensions by Steve Llanso of Middle Run Media
Class15
Locobase ID6225
RailroadCompagnie Paul Frot
CountryFrance
Whyte0-4-0T
Number in Class3
Road Numbers15, 25
GaugeMetre
Number Built3
BuilderCorpet, Louvet & Cie
Year1925
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)36,597 / 16,600
Engine Weight (lbs / kg)36,597 / 16,600
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)30 / 15
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)31.50 / 800
Boiler Pressure (psi / kPa)181.30 / 1250
High Pressure Cylinders (dia x stroke) (in / mm)9.84" x 15.75" / 250x400
Tractive Effort (lbs / kg)7461 / 3384.26
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.91
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2) 5.38 / 0.50
Evaporative Heating Surface (sq ft / m2)282 / 26.21
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)282 / 26.21
Evaporative Heating Surface/Cylinder Volume203.42
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation975
Same as above plus superheater percentage975
Same as above but substitute firebox area for grate area
Power L1
Power MT

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