Enginespec for Norris Class A 4-2-0.
Drivers: 48 inch
Cylinders: 11 by 20 inch
Weight: 29,630 pounds
Adhesive weight: 11,200 lbs
Tractive effort: 3,000 pounds
Grate area: 9.5 feet
Tubes: 97
Tube diameter: 2 inch
Heating surface: 394 square feet
Boiler pressure: Variable. Typically between 60 and 80 psi