EP Rentz 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 101 (Locobase 13716)

Data from Baldwin Locomotive Works datacard as digitized by the DeGolyer Library of Southern Methodist University, Volume 36, p.139. Works number was 36130 in February 1911.

At the same time E P Rentz bought the wood-burning Ten-wheeler for his Ocala Northern Railway (see Locobase 13715), he bought this 4-6-0. It was identical except for the use of 50" drivers (6" shorter) and a lowered boiler pressure. Clearly, this was the "special products" variant that would step carefully down the lightly built timber roads and pull the logs out.

Rentz sold the engine to locomotive rebuilder/reseller Georgia Car & Locomotive, which found a ready buyer in the Florida & Alabama of Baghdad, Fla. Years later, the 12 would be sold to the Shreveport, Houston & Gulf of Manning, Tex and later still would move to the Moscow, Camden & San Augustine of Camden, Tex. By that time, the 5 had acquired a handsome "cabbage stack".

Ultimately, the 5 was sold to the Polk County Museum in 1970 and went on display at Heritage Park.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID13716
RailroadEP Rentz
Number in Class1
Road Numbers101
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.83 / 3.91
Engine Wheelbase (ft / m)22.98 / 7
Ratio of driving wheelbase to overall engine wheelbase 0.56
Overall Wheelbase (engine & tender) (ft / m)45.40 / 13.84
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)72,000 / 32,659
Engine Weight (lbs / kg)95,000 / 43,091
Tender Loaded Weight (lbs / kg)57,000 / 25,855
Total Engine and Tender Weight (lbs / kg)152,000 / 68,946
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)40 / 20
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)50 / 1270
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)16,712 / 7580.44
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.31
Heating Ability
Tubes (number - dia) (in / mm)178 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.23 / 3.73
Firebox Area (sq ft / m2)90 / 8.36
Grate Area (sq ft / m2)15.50 / 1.44
Evaporative Heating Surface (sq ft / m2)1222 / 113.53
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1222 / 113.53
Evaporative Heating Surface/Cylinder Volume218.60
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2480
Same as above plus superheater percentage2480
Same as above but substitute firebox area for grate area14,400
Power L13988
Power MT366.33

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