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CBQ/Burlington #7 Wood Beam Trucks!
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   CBQ/Burlington #7 Wood Beam Trucks!
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   Author  Topic: CBQ/Burlington #7 Wood Beam Trucks!  (Read 2964 times)
Steen_Rudberg
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Posts: 261
Re: CBQ/Burlington #7 Wood Beam Trucks!
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« Reply #80 on: Feb 3rd, 2014, 5:46am »
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Hi
 
Do you have any measures on the break shoe?


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Steen Rudberg
Good judgement comes from experience, experience comes from bad judgement.
Steam290
Chaser
Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
 
« Reply #81 on: Feb 12th, 2014, 6:17pm »
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Are you talking about the 1.5" scale ones I got from Railroad Warehouse?
 
The hole goes through at an angle of 10 degrees. From the edge of the hole to the back on the outside it is 0.224. Inside is 0.268.
 
Dale


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Steam290
Chaser
Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
 
« Reply #82 on: Feb 16th, 2014, 9:47am »
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Can't even read my own notes. Hole angle is 17 degrees.

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Steam290
Chaser
Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
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« Reply #83 on: Feb 16th, 2014, 10:37am »
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I've been working on the brake design. I have railroad warehouse Andrew truck brake heads/shoes that I am going to use. Here's the latest design. I have the brake hangers and brake beam constructed.
 
I've been thinking about suspending a Clippard air cylinder below the truck attached to the two brake beams and pulling the brake beams together. I haven't determined if I have enough room. Anyone want to express an opinion on best Clippard cylinder for the application?


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« Last Edit: Feb 16th, 2014, 11:55am by Steam290 » Logged
fred_55
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Re: CBQ/Burlington #7 Wood Beam Trucks!
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« Reply #84 on: Feb 16th, 2014, 10:49pm »
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Hi, I am using Airtrac(very similar to Clippard) 3/4" bore 1" stroke. One on each truck for the brake van, and one central unit with rods for the cattle cars.
With respect, you have very accurate trucks, and a cylinder even on top of the bolster would be hard to hide.
What did the original have?
Pete
 
btw Air cylinders push, not pull, so you'll need some pivots too. (or change to vacuum.)


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« Last Edit: Feb 16th, 2014, 10:53pm by fred_55 » Logged

Fat Controller of the Brisbane Valley Tramway
Steam290
Chaser
Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
 
« Reply #85 on: Feb 17th, 2014, 11:47am »
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The prototype had the brake cylinder mounted on the body with brake linkage to the trucks. Thought I might get lazy and try to put cylinders on the trucks to start with. Less work. And I was also thinking that the only way the air cylinder would work was to push or extend. Unless I wanted to get really fancy and try double acting. Thanks for the input. Bouncing different things around.
 
Dale


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fred_55
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Re: CBQ/Burlington #7 Wood Beam Trucks!
 
« Reply #86 on: Feb 18th, 2014, 2:47am »
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Sorry Dale, getting lazy just doesn't cut it  Do the body mounted cylinder and linkage (then you can do the handbrake too .)
 I know someone who has K brake cylinders to hide the uglies   You might be able to bore one out and fit the Clippard cylinder inside.
Pete


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Fat Controller of the Brisbane Valley Tramway
Steam290
Chaser
Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
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« Reply #87 on: Feb 18th, 2014, 8:18pm »
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Yeah Yeah Yeah. I'm a stickler for details. I am sure I am going to end up as you suggest. Already have a drawing for the truck brake beam levers. And I put together a drawing for the brake beam king post. So you see, while I want to shortcut, I'll probably do it right.

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Steam290
Chaser
Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
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« Reply #88 on: Apr 24th, 2014, 1:00pm »
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So here's my brake beam king post assembled with Railroad Warehouse brake heads/shoes. One small problem - I didn't "mirror" the brake beam king posts. So one slants clockwise and the other counterclockwise DOH!!
 
It's also quite a surprise how bowed the brake beam can become by tightening the nuts on the end of the truss rod. Think I almost broke my first one.


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« Last Edit: Apr 24th, 2014, 1:01pm by Steam290 » Logged
Steam290
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Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
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« Reply #89 on: Apr 24th, 2014, 8:34pm »
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Took a trip to Harrisburg, PA for the Cabin Fever Expo. Stayed at the Bridgeview Bed & Breakfast. If you don't know about it and you are a railfan - you need to check it out. www.bridgeviewbnb.com No affiliation - just a happy customer. However, a little bit better breakfast would be nice.
 
Anyway, at the Expo, Howard Gorin, http://www.themachineryworks.com, had a table set up. And lo and behold - the brakeheads that I was really looking for were to be had. And a few other goodies. Again, no affiliation. Howard's brake beam king posts were not going to fit my "new" as it should be design. But I had to have a pair just to look them over.


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« Last Edit: Apr 25th, 2014, 9:25pm by Steam290 » Logged
Steam290
Chaser
Posts: 60
Re: CBQ/Burlington #7 Wood Beam Trucks!
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« Reply #90 on: Mar 14th, 2015, 9:50am »
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Can't believe it's been almost a year since my last update.  
 
Second run of castings has been done. Found a less expensive foundry, CA Brown up in the Northeast. Unfortunately, they were unable to use my molds. Seems the original foundry did it their own way and did not follow the process of using a wax injection process that other foundries use.
 
Finally drew up a journal box lid. Used Shapeways to print them out in plastic. Forgot to allow for the "ear" of the journal box. DOH. Had to mill out the back side. And also found that my design of the journal box from the car builder's cyclopedia had a couple projections on the front that I had to mill off. Had I drawn up the journal box lid early, I would have found that issue.
 
So here's a pic.
 



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moose_the_caboose
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Posts: 1480
Re: CBQ/Burlington #7 Wood Beam Trucks!
 
« Reply #91 on: Mar 31st, 2015, 3:24pm »
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on Mar 14th, 2015, 9:50am, Steam290 wrote:       (Click here for original message)
Can't believe it's been almost a year since my last update.  
 
Second run of castings has been done. Found a less expensive foundry, CA Brown up in the Northeast. Unfortunately, they were unable to use my molds. Seems the original foundry did it their own way and did not follow the process of using a wax injection process that other foundries use.
 
Finally drew up a journal box lid. Used Shapeways to print them out in plastic. Forgot to allow for the "ear" of the journal box. DOH. Had to mill out the back side. And also found that my design of the journal box from the car builder's cyclopedia had a couple projections on the front that I had to mill off. Had I drawn up the journal box lid early, I would have found that issue.
 
So here's a pic.
 

 
COOL!  you already know I want them...


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