2 1/2" scale 4-6-0 build

Where users can chronicle their builds. Start one thread and continue to add on to it.

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djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

This material is some kind of stainless the was found on one of many dumpster dives at my employment probably 25 years ago. It turned nice. 2.5 down to 1.5 for brake pistons.
Jim
Attachments
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Odyknuck
Posts: 813
Joined: Mon Aug 08, 2022 4:21 pm
Location: Chardon, Ohio

Re: 2 1/2" scale 4-6-0 build

Post by Odyknuck »

Gotta love having scrap steel laying around as it comes in handy.
djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

Found time to machine the brake pistons this morning. Jim
Attachments
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No problems just solutions.
djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

Piston pressed on rod. Waiting on springs.
Turned two centers crossed drilled 1 reamed the other tapped
Cut a brass slung to go between the rod and set screw
Attachments
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No problems just solutions.
Odyknuck
Posts: 813
Joined: Mon Aug 08, 2022 4:21 pm
Location: Chardon, Ohio

Re: 2 1/2" scale 4-6-0 build

Post by Odyknuck »

What's the device in the bottom pic used for?
djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

Trammel for the center to center of axles for laying out side rods. Jim
Attachments
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No problems just solutions.
Odyknuck
Posts: 813
Joined: Mon Aug 08, 2022 4:21 pm
Location: Chardon, Ohio

Re: 2 1/2" scale 4-6-0 build

Post by Odyknuck »

Ah, ok. Nice job on the brake pistons.
djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

Well these brake cylinders have been full of learning opportunities. First had to move them forward and while trying to install o ring on piston and into the cylinder it was to tight for my liking. I used the print dimensions which fell in line with standard charts but was to tight. After digging I found some great info in Winton Brown engineering info and online found Model Engineers handbook .
Rechucked the cylinders and placed a 15 degree bevel on both ends. Then the piston rod with piston in a collet to deepen the o ring grove to reduce the squeeze. You can teach old dogs new tricks. Jim
Attachments
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No problems just solutions.
djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

Ordered pins when I ordered springs for the brake cylinders. Hope to finish up the breaks today. Jim
Attachments
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djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

A lot of fiddle work but the brakes are complete. Not yet. The center bent rods are touching the eccentric straps on the low oscillation.
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No problems just solutions.
djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

Not a lot progress lately but here is some shots.
The brake shoes for the tender were made from scrap aluminum cut off blocks I have enough for one or two more cars . The shoes were machined like the engine shoes with a 2.5 degree taper.The hangers are temporary. out of aluminum to find the height The brake beams are fabed but I need the cylinders to continue. Jim
Attachments
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No problems just solutions.
djjh87
Posts: 405
Joined: Tue Apr 29, 2008 5:32 pm
Location: florida

Re: 2 1/2" scale 4-6-0 build

Post by djjh87 »

More scrap 4x4 3/8 thick angle.
This is the beginning of a dummy rod. Jim
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