Tender trucks

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hoppercar
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Joined: Sun Jul 22, 2018 4:09 pm

Tender trucks

Post by hoppercar » Thu Mar 18, 2021 7:00 pm

Does anyone know of the availability of 1 1/2 scale ..6 wheel commonwealth tender truck castings?.....seems like when I was at mill creek a few years ago, there was a vendor, who had made patterns for them ?...searching thru my records, so far I can't come up with a name , for who has them ??

Berkman
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Joined: Wed Aug 16, 2017 7:55 pm

Re: Tender trucks

Post by Berkman » Thu Mar 18, 2021 8:43 pm

I think Little engines offers them.

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Peter Crisler
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Location: Middletown, KY

Re: Tender trucks

Post by Peter Crisler » Thu Mar 18, 2021 9:03 pm

hoppercar wrote:
Thu Mar 18, 2021 7:00 pm
Does anyone know of the availability of 1 1/2 scale ..6 wheel commonwealth tender truck castings?.....seems like when I was at mill creek a few years ago, there was a vendor, who had made patterns for them ?...searching thru my records, so far I can't come up with a name , for who has them ??
I got mine from Dave Bortz. He's on the forum.

Berkman
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Re: Tender trucks

Post by Berkman » Fri Mar 19, 2021 8:04 am

There's someone else who I've seen referenced the sells the side frames as well, but don't remember the name.

I don't think Dave's, LE or the 3rd source offer drawings etc for truck mounted airbrakes, but I might be mistaken.

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Highiron
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Location: Lancaster, PA

Re: Tender trucks

Post by Highiron » Fri Mar 19, 2021 8:11 pm

There are basic drawings on the Little Engines Commonwealth tender truck blueprints for brakes they require some tweaking but they are there

RONALD
Posts: 624
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Re: Tender trucks

Post by RONALD » Sat Mar 20, 2021 1:09 pm

I cast my own.

The photos below are of the styrofoam pattern I made and then of the cast truck, done in A356 aluminum.

It requires making a foam pattern for every part needed including the iron wheels, the white stuff on the right is yet to be poured journal boxes.

Got the drawings from the N&W Historical Society: https://www.nwhs.org/archivesdb/rolling ... Type=Steam

Lost Foam044.jpg
DSCN8235.JPG

Berkman
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Re: Tender trucks

Post by Berkman » Sat Mar 20, 2021 1:20 pm

There were different styles of commonwealth trucks, I don't know them all. but that I think is a later version than what was commonly seen on earlier steam. Also, some were built to different wheelbase lengths.

hoppercar
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Re: Tender trucks

Post by hoppercar » Sat Mar 20, 2021 5:44 pm

Wow, that's interesting. I have made many traditional wood patterns over the years, but have never tried the styrofoam technique. What happens to the surface finish of the casting, when the pour burns out the styrofoam ??

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Fender
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Location: Chattanooga TN

Re: Tender trucks

Post by Fender » Sun Mar 21, 2021 7:55 am

Usually, the styrofoam pattern is coated with a plaster or ceramic “slurry” that is then allowed to set. The coating prevents the mold from collapsing when the styrofoam burns out.
Dan Watson

RONALD
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Re: Tender trucks

Post by RONALD » Mon Mar 22, 2021 9:44 pm

When I cast those tender truck, the tender waterbed, and other parts from foam patterns, I used a lot of Sodium Silicate treated sand.

The flask was entirely filled with that sand.

Of course, as an amateur, I had no why to recover that sand, it was worth the price!

I have used ceramic slurry also, as seen in the second photo, but it is a rather complicated procedure.

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