Joseph F Nelson

PRR K-4


P.R.R. K-4

The North American Live Steamer, Volume 1 Number 6

Joe Nelson of Los Angeles sends us this photo of his K-4 Pacific. Except for a reservoir under the left running board and the lettering, the engine as shown was on the rails under steam 22 months after starting construction. The specifications are as follows.


 * Scale: 1 inch
 * Type: Pennsylvania Rail Road K-4 Pacific
 * Weight in running order: 379 pounds
 * Weight dry: 295 pounds
 * Operating pressure: 105 pounds
 * Fuel: hard coal
 * Bore & Stroke: 1-5/8 inch by 2-5/16 inch
 * Valves: Piston, 7/8 OD 9/16 travel
 * Boiler: Belpaire - Steel
 * Max boiler OD: 7-1/2 inch, 8 inch over lagging
 * Grate Area: 6 by 9-1/2 inches
 * Tubes: 5/8 inch OD, quantity 20
 * Boiler capacity: 2-3/4 gallons
 * Tender capacity: 5.65 gallons & 14-1/2 pounds fuel
 * Tractive effort: 31.4 pounds
 * Weight on drivers: 148-1/2 pounds
 * Weight on leading truck: 50 pounds
 * Weight on trailing truck: 49-1/2 pounds