EARLY 4-6-6-4 CHALLENGER. FRAME

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EVGEN
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EARLY 4-6-6-4 CHALLENGER. FRAME

Post by EVGEN » Fri Feb 23, 2018 11:18 am

Hello!

Recently I learned about the existence of an early version of the legendary Challenger. I also learned that perhaps early locomotives had bar frames. It's true?
Question to the owners of the DVD disc "EARLY 4-6-6-4 CHALLENGER DRAWINGS" - on the disk there are drawings of an early version of the locomotive with a bar frame?

P/S Early Challenger with a bar frame is the perfect locomotive for construction !!

WJH
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by WJH » Fri Feb 23, 2018 12:00 pm

If it did or didn’t, you can build a model however you see fit


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EVGEN
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by EVGEN » Fri Feb 23, 2018 12:07 pm

I can create a model. Instead of cast frame make a welded or bar. However, I want to get a model that is as close as possible to the prototype, especially if there was a locomotive with a bar frame. Presumably the locomotives from 1936-1939 had bar frames.

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NP317
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by NP317 » Fri Feb 23, 2018 12:11 pm

Scale and gauge?
~RN

EVGEN
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by EVGEN » Fri Feb 23, 2018 12:18 pm

At least gauge 7 1/4

EVGEN
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by EVGEN » Fri Feb 23, 2018 1:24 pm

Honestly, I haven't decided yet. I am considering several options. The choices are as follows: 10 1⁄4 in (260 mm) or 12 in (305 mm)

Berkman
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by Berkman » Fri Feb 23, 2018 2:21 pm

Most modern locomotives had a cast frame. No model i've seen has ever had a cast frame regardless of gauge. Plenty of people build super power 4-8-4s etc with waterjet or laser side frames. Don't choose a prototype to model based on if it had a cast frame or not.

EVGEN
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by EVGEN » Fri Feb 23, 2018 2:34 pm

Berkman wrote:
Fri Feb 23, 2018 2:21 pm
Most modern locomotives had a cast frame. No model i've seen has ever had a cast frame regardless of gauge. Plenty of people build super power 4-8-4s etc with waterjet or laser side frames. Don't choose a prototype to model based on if it had a cast frame or not.
A matter of taste, I suppose. In fact, it's very nice to when the model is as close as possible to the prototype. I don't like compromise solutions.

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JohnHudak
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by JohnHudak » Fri Feb 23, 2018 3:28 pm

Berkman wrote:
Fri Feb 23, 2018 2:21 pm
Most modern locomotives had a cast frame. No model i've seen has ever had a cast frame regardless of gauge. Plenty of people build super power 4-8-4s etc with waterjet or laser side frames. Don't choose a prototype to model based on if it had a cast frame or not.
Berkman, Here is a photo of two 3/4" scale models that have cast frames.. The one on the left is a UP Challenger and the one on the right is a CB&Q S-4 Hudson..
John
old photos 151.jpg

RONALD
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by RONALD » Fri Feb 23, 2018 4:54 pm


Berkman
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by Berkman » Fri Feb 23, 2018 5:31 pm

John,

That's impressive! Never seen one in 7.5 gauge though.

EVGEN
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Re: EARLY 4-6-6-4 CHALLENGER. FRAME

Post by EVGEN » Fri Feb 23, 2018 5:52 pm

RONALD wrote:
Fri Feb 23, 2018 4:54 pm
Here is information on frames:
http://www.chaski.org/homemachinist/vie ... 30#p233330
Amazing castings! However, before proceeding to casting, there should have been locomotives with the usual bar-like frames. In the interval 1936-1939.
Berkman wrote:
Fri Feb 23, 2018 5:31 pm
That's impressive! Never seen one in 7.5 gauge though.
To pour such a detail would be damn difficult. However, it is possible.To pour such a detail would be damn difficult. However, it is possible. It will be necessary to simulate the filling process, after which you can make a casting. You can try using 3D printing.

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