TH&B 70 Ton Hoppers Part 6 – Trucks

In his response to my previous post on this topic, Chris Mears asked about the trucks that came with the Stewart model I used for my TH&B hoppers. I’ve put together a short post in response to his question.

Because I mentioned the ill-fated attempt at using True Line trucks in my previous post, I want to expand on this first.  True Line has had their fumbles, and the masses have subsequently beaten them with suitable vigour.  I think it’s safe for us to leave that debate to the various online fora.  I’ll celebrate the fact that they’ve survived the lashings, and they continue to make a go of it.  I own a number of their models and I especially like their slab side covered hoppers.   I’m in line for a pair of their upcoming SW1200RS models, and I’m hoping for another run of their CP and CN vans and the slab sided covered hoppers.  My experience with their freight car trucks was a disappointment.  They should never have let those parts get into a package and onto store shelves.  One pack of bad trucks would be a fluke, but I bought two packages and both were unusable.  In the end, I was refunded my money, but I that’s beside the point.  It’s inconvenient for me to get to a store that has the parts I need for the hobby.  I want to support bricks and mortar stores, but when I get there and put my money down, I should not be performing quality control for any product I purchase, especially if that product carries a premium price, and is not labelled as a factory defect or second.  There; I can move on.

As I wrote in my previous post, I wanted to move the project forward.  Chris’s question was whether the Stewart sideframes are good enough to keep if the wheelsets are replaced.  Let’s go through some photos and figure this out.

Here’s a photo of a truck on the prototype car.


Next is a series of photos of the stock Stewart trucks from my models.




You’ll have to ignore the compression that took place when I took the prototype photo with a telephoto lens, and the expansion that took place when I took the model photos with my iPhone set to wide angle.  The Stewart model appears to have the correct proportions, despite these distortions.

The Stewart part is missing some finer details on the journal doors, the openings at the ends of the frame, and the insides of the bolster openings.  The lip around the opening in the truck frame is too pronounced.  The overall dimensions seem appropriate for a 70 ton truck.  The detail that bugs me the most is the area under the springs on the frame.  That looks different from the prototype.

I suspect that Stewart was aiming at representing a 70 ton capacity ASF A-3 Ride Control truck (with solid bearings, obviously).  I don’t know the origin of the trucks on the TH&B car.  Maybe they were cast by National Steel Car themselves, and are therefore going to be slightly unique from the ASF trucks.  Maybe my spotting is off.  I’m hoping someone can enlighten me on this.

Tangent Scale Models builds a much nicer model of a truck that represents the same prototype as the stock Stewart truck.  This is still not an exact match to that on the TH&B car (again, my spotting could be off).  Here’s the Tangent model (image is from their website).


There are some other quality representations of the ASF truck available in HO scale, but the photo of the Tangent model illustrates the improvement in quality that’s taken place over the past two decades.  My options, as I see them, are to equip the stock trucks with replacement wheelsets, or buy something like the Tangent trucks.  The stock trucks with replacement wheelsets will certainly work.  Whether they match the level of detail on the car the way I’ve modified it is a question I’ll wrestle with over the next while.  I’m leaning toward the Tangent truck with semi-scale metal wheels.

Thanks for the question, Chris.  What would you do?