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 | |
|---|---|
| Class | I-5 |
| Locobase ID | 187 |
| Railroad | New Haven |
| Whyte | 4-6-4 |
| Road Numbers | 1400-1409 |
| Gauge | Std |
| Builder | Baldwin |
| Year | 1937 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14' |
| Engine Wheelbase | 40.08' |
| 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 per yard of rail on which locomotive could run | 107 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 80" |
| 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 |
| Heating Ability | |
| Firebox Area | 480 sq. ft |
| Grate Area | 77.10 sq. ft |
| Evaporative Heating Surface | 3815 |
| Superheating Surface | 1042 |
| Combined Heating Surface | 4857 |
| 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 |
| Power L1 | 44892 |
| Power MT | 1538.39 |
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