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Post by backshophoss on Jan 20, 2017 1:56:16 GMT -5
You seem to be heading in the right direction,it would be wise to clean up and paint that intact frame to protect it.
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Post by sd80mac on Jan 23, 2017 0:25:56 GMT -5
Here are a few more shots...
In that last shot you can clearly see that the engine compartment doors are wrong as well as the auxiliary equipment compartment behind the cab. It will be a major undertaking to correct the errors, but well worth the effort!
Donnell
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Post by backshophoss on Jan 23, 2017 1:58:36 GMT -5
If memory serves,this was a reuse of the Dash 8-40 B bodyshell for the Walters "trainline" version.
That frame is shaping up as a good replacement for the factory crumbling "defective" underframe.
What did you use for the truck bolsters?
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Post by sd80mac on Jan 23, 2017 2:34:56 GMT -5
The bolsters are short lengths of .250" x .0625" brass bar stock that I soldered to the main floor. This, combined with the thickness of the main floor, brought the overall bolster thickness to 0.09375". The original fram bolster is approximately .100" thick, so my version was close enough.
I drilled a .125" hole thru the center of both bolsters, and then countersunk a .1875" diameter hole .060" deep from the top to provide relief for the truck bolster pin.
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Post by backshophoss on Jan 23, 2017 2:54:49 GMT -5
Thank you
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Post by slowfreight on Jan 23, 2017 18:13:01 GMT -5
What do you use to cut the brass sheet? Your edges don't show saw marks.
I see some nice opportunity for adding traction motor cables and air piping when you're done.
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Post by sd80mac on Jan 24, 2017 16:33:09 GMT -5
Rough cuts were made with a rotary cut-off wheel. All finish cuts were made with the trusty Sherline mill! All parts and pieces were soldered with a torch!
Donnell
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Post by backshophoss on Jan 24, 2017 22:23:38 GMT -5
Is that fuel tank casting the only weight for this model? Brass is a lightweight metal,at least it does not rust!  LOOKS just as massive as the prototype underframe! |
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Post by sd80mac on Jan 24, 2017 22:49:46 GMT -5
The new brass frame is not as heavy as the original cast metal frame, but it does have decent weight. Once the motor and flywheels are added, it will become even heavier. Also, the inherent low-profile design of the drive leaves plenty of room to add even more weight!
Donnell
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Post by backshophoss on Mar 24, 2017 22:52:42 GMT -5
Have you gotten to the point to where the drive is installed and ready for a test run?
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