Firebox heating surface included 139 sq ft of syphons (3) and 81 sq ft of combustion chamber. The cylinders were fed through 11" piston valves. The New Haven calculated water evaporation at 59,359 lb/hour of which the direct heating surface accounted for 26,400 lb/hour. This could be set against the max consumption of 51,626 lb/hour, yielding a boiler factor of 115%.
Other features included an integral cast frame and roller bearings on the drivers (Timkens on 1401-1404, SKF on the rest) and ASF roller bearings on the leading and trailing trucks.
The Catskill Archive of old writeups about steam locomotives includes a late 1930s article on the I-5 -- http://www.catskillarchive.com/rrextra/nynh1400.Html, accessed 22 January 2007. According to the account, Baldwin's hearty Hudsons responded to a requirement that the new engines be able to muscle 12-car, 830-ton (755-tonne) trains up the Sharon Heights 0.6-0.7% grades at 60 mph.
The New Haven received everything they asked for. Every day 8 of the 10 streamliners worked the Merchant's Limited between New Haven and Boston on 24 daily trips with the other two in repair or reserve. The I-5s were reliable, but their latent power could not be fully exploited because of speed restrictions on the line.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||New Haven (NYNH&H)|
|Number in Class||10|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.35|
|Overall Wheelbase (engine & tender)||84.83'|
|Axle Loading (Maximum Weight per Axle)||64400 lbs|
|Weight on Drivers||193000 lbs|
|Engine Weight||365300 lbs|
|Tender Light Weight||332000 lbs|
|Total Engine and Tender Weight||697300 lbs|
|Tender Water Capacity||18000 gals|
|Tender Fuel Capacity (oil/coal)||16 tons|
|Minimum weight of rail (calculated)||107 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||285 psi|
|Cylinders (dia x stroke)||22" x 30"|
|Tractive Effort||43968 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.39|
|Firebox Area||480 sq. ft|
|Grate Area||77.10 sq. ft|
|Evaporative Heating Surface||3815 sq. ft|
|Superheating Surface||1042 sq. ft|
|Combined Heating Surface||4857 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||289.04|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||21974|
|Same as above plus superheater percentage||26588|
|Same as above but substitute firebox area for grate area||165528|