EP Rentz 4-6-0 "Ten-wheeler" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13,716
RailroadEP Rentz
Number in Class1
Road Numbers101
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)12.83
Engine Wheelbase (ft)22.98
Ratio of driving wheelbase to overall engine wheebase 0.56
Overall Wheelbase (engine & tender) (ft)45.40
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)72,000
Engine Weight (lbs)95,000
Tender Loaded Weight (lbs)57,000
Total Engine and Tender Weight (lbs)152,000
Tender Water Capacity (gals)3000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)40
Geometry Relating to Tractive Effort
Driver Diameter (in)50
Boiler Pressure (psi)160
High Pressure Cylinders (dia x stroke) (in)16" x 24"
Tractive Effort (lbs)16,712
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.31
Heating Ability
Firebox Area (sq ft)90
Grate Area (sq ft)15.50
Evaporative Heating Surface (sq ft)1222
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1222
Evaporative Heating Surface/Cylinder Volume218.80
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 L13992
Power MT366.70

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