In the future (when the layout is operational) I will be taking pictures of the freight cars from a railfan perspective and feature them in a slide show here.

For a Class I Railroad, the New Haven had a small roster of freight cars. In some cases a single class of car on some of the larger railroads (Such as the B&O M-26 class boxcars) outnumbered the total roster of the New Haven.
In addition, to keep things interesting for modelers and railroad historians at least, the New Haven rarely utilized standard cars. For example, 1,500 of the Pullman-Standard PS-1 boxcars were delivered with a 10' interior height; 6" shorter than the PS-1 boxcars that were built for most other railroads (and the first 1,000 of the ones delivered to the New Haven). As a result, it makes it difficult to find accurate models for many of the freight cars.

May 1, 1950 ORER

Boxcars: 6,008
  • 30000-30999: 990
  • 31000-31349: 348
  • 31350-31499: 147
  • 31500-31649: 149
  • 31650-32999 : 1,333 - except: 32900-32907, 32909: 9
  • 33000-33099: 99
  • 33100-33499: 398
  • 33500-34499: 996
  • 34500-35999: 1,498
  • 61777: 1 (Steel Underframe)
  • 63060,63823: 2 (Steel Underframe)
  • 64432,64929: 2 (Steel Underframe)
  • 65880-67160: 3 (Steel Underframe)
  • 68339-68635: 3 (Steel Underframe)
  • 69072,69545: 2 (Steel Underframe)
  • 70059-70924: 18 (Steel Underframe)
  • 71039-71942: 4 (Steel Underframe)
  • 72124,72129: 2 (Steel Underframe)
  • 72231,72371: 2 (Steel Underframe)
  • 84301: 1 (Side Door, Steel Underframe)
  • 86020: 1 (Side Door, Steel Underframe)
Covered Hoppers: 15
  • 117000-117014: 15
Flat Cars: 211
  • 17050-17059: 10
  • 17060-17069: 10
  • 17080-17082: 3
  • 17090-17093: 4
  • 17200-17274: 74 (34 Class FM/40 Class FC)
  • 17300-17399: 100 (45 Class FM/55 Class FC)
  • 42152-42186: 10 (5 60,000 lb./5 80,000 lb.)
Gondolas: 1,153
  • 50000-50014: 15
  • 58000-58499: 495 (361 Class GB/134 Class GA)
  • 60000-60498: 493 (411 Class GB/82 Class GA)
  • 60500-60649: 150
Hoppers: 993
  • 115000-115545: 424
  • 116000-116249: 250
  • 120000-121299: 319
Total: 8,380

Layout at a Glance

I have compiled a working spreadsheet for my roster. Most are still in kit form as of this writing. I have perhaps another two dozen undecorated kits that have yet to be assigned to a road and are not listed. In addition, there is a list of all of the models that I want to acquire.
One of the biggest challenges I've found as a prototype modeler is identifying which models are reasonably accurate, and for which roads. To the best of my knowledge, all of the cars in my roster and wish list meet my standards for prototypical accuracy and fidelity. 

New Haven Railroad Freight Car Models

I've also compiled a spreadsheet that details the New Haven freight car roster for my era, and appropriate models.
Box Cars 
The postwar New Haven Box Car fleet is easy to model. Westerfield and NHRHTA/F&C have released resin models of the majority of wood box cars still found in MOW service. Steel box cars are easily modeled using Intermountain kits.
Red Caboose (8002) kits can be used for the 30000-32999 cars.  Kadee PS-1 kits could be used for the 33500-34499 series with similar modifications as the Intermountain ones as detailed in Ted Culotta's Essential Freight Cars #40 in the January 2008 RMC.
Note: It is common in the modeling community to identify AAR Double-Truss trucks as 'Bettendorf'. In this case, the trucks listed are appropriately labeled as they were built by Bettendorf.
Covered Hoppers
The New Haven rostered only two covered hopper prototypes, and both are easy to model.
The 15 117000-117014 were delivered in 1949. Models have been produced by Eastern Car Works, Bowser, Kato and others. But the Intermountain version released a couple of years ago is by far the most accurate.
In late 1954 the New Haven acquired 85 PS-2 covered hoppers and the Kadee model is excellent.
Flat Cars 
Of the various New Haven flat cars, the major classes are available.
Both the 17050- and 17060-series can be modeled with the (discontinued) Eastern Car Works model. They show up from time-to-time on eBay and on hobby store shelves. The latter series has slightly longer end decks and could be modified to be more accurate.
The 17200- series flat cars can be modeled using the excellent Speedwitch kit.
The 17300-series cars have been produced by Sunshine and Protowest (although not lettered for NH). However, the Intermountain release is also very good, and after thinning the wood deck is nearly as accurate.
Although not large classes on the New Haven in the postwar era, these are important cars for my layout due to the industries, particularly Stanley Works.
The 58000- and 60000- series are the key ones, and while there have been some rumors of future models, at this time there are no accurate New Haven gondola models available.
In 1940 the New Haven rostered about 2,250 hoppers. By 1950 it was down to 1,004.
The 115000- and 120000- series are USRA and USRA clone 55-ton twin hoppers. There are several models available, but with various issues.
The Accurail model is very accurate, but with molded on details.
The Tichy model has much better (and separate details) but was tooled with the center two panels too wide.
MTH has recently released a model, with excellent detail. But it's not available lettered for the NH, and it's the delivery configuration with K-brakes. Because it's only available RTR, it won't be an easy model to modify.
If MTH eventually releases a modernized version with AB Brakes, I'll go with that one. Otherwise, I'll be using the Accurail model. The primary hurdle on making the Accurail one look as good as the MTH one is my current skill in shaving off grab irons.
Aside from one or two New Haven hoppers of this design, I'm also planning on modeling B&O, CNJ, D&H, DL&W, NYC, RDG, and possibly a PRR one.
There are no available models for the 116000-series.