Railroad Warehouse 2.8.2 Mikado Logger Build

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Bill Shields
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Bill Shields »

Do not worry about sloppy brake linkage.

Loose as a goose is just about right.
Too many things going on to bother listing them.
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makinsmoke
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by makinsmoke »

Nuts on top. Drill a hole through the nut and bolt and safety wire it.
Odyknuck
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Location: Chardon, Ohio

Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

Good ideal however it still only gives me an additional 3/16" clearance. I'm leaning towards cutting the heads off the shoulder bolts and weld them in. Upon future investigations, some of the links can be installed on top of others. This would eliminate those bolts from the equation and be used as is with nuts on top.
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NP317
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by NP317 »

Odyknuck wrote: Sun Jan 22, 2023 10:10 pm [snip]
Curious Russ, how far does your linkage hang down?
That sounds like a personal question... :lol: :lol: :lol:

OK. Attached is a picture I just took in my COLD shop.
It shows clearance from the rail top to the lowest hanging item under my Mikado to be 0.4 inch.
If I removed the stack of washers I could gain another 0.1 inch of clearance for 1/2" total.
So far the loco has not snagged anything when operating.
RussN
Attachments
D028BC16-BF6A-4B9C-AD23-406040EF807A_rotated.jpg
Last edited by rmac on Mon Jan 23, 2023 8:35 pm, edited 1 time in total.
Reason: Photo Orientation
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

Thanks Russ, that was very helpful as it gives me a benchmark. I am in the process of redesign. There is not much I can do for the cylinder, maybe another 1/8" to 3/16". That would bring the clearance to .375 to .437" respectively. I will make the fulcrum like a single sheer and pickup another 1/4".
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Bill Shields
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Bill Shields »

there may be a reason why many brake cylinders are on the side or top of the frames or tucked up in-between -> rather underneath....
Too many things going on to bother listing them.
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

Yes, I agree a better Brake Cylinder location would be anywhere besides where mine is lol. I was able to gain another 1/8" of cylinder clearance. I could pick up another 3/16" by welding the mounting bracket to the back side of the Pilot truck cross Brace. I made the fulcrum bracket a single shear and gained 5/16" on that.
Attachments
Cylinder track clearance.jpg
FullcrumNewClearence.jpg
FulcrumSingleShear.jpg
Last edited by Odyknuck on Tue Jan 24, 2023 11:09 pm, edited 1 time in total.
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

I also redid all the brake linkage and gained a lot of clearance by installing all of the links under the Brake shoe cross links with Shoulder bolt heads down. The Bolt heads are about even with the bottom of the brake shoe arms and they are by design, so I'm good there. I canned the cut and weld ideal as it would be too much work for little gain. I did have to remake one link that ran above one of the driver journal braces. It has an offset to go around the bracket that allowed me to drop in under the other links. I decided to just blue it in lieu of paint as it is so much faster.
Attachments
BrakeLink Offsetjpg.jpg
BrakeLinkageNewClearance.jpg
BrakeLinkageNew.jpg
BrakeLinkageNewTop.jpg
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

Got the Brake link Bolts safety wired today. Used a Center drill followed up with a .055" Drill.
You know, I'm never going to get this project done if I keep listening to you Guys lol. :| It will however be right! :mrgreen:
Attachments
BrakeLinkBoltCenterDrill.jpg
BrakeLinkBoltDrill.jpg
BrakeLinkSafetyWire2.jpg
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

I have the final design on the Brake cylinder completed and ready to paint. After several revisions to the existing design, I decided to just make some new parts. These revisions will provide plenty of clearance between the cylinder and track. After installing the cylinder and fulcrum arm as low as they would go, the cylinder hit the driver journal at full droop, and I had to clearance the edge. The Brake drake link clevis was too close to the Pilot truck pivot pin, so I made a new one that is flush and a retainer to keep in in place. I also ran into some frame clearance issues turning the linkage bolts with nuts down and had to fix that.
Attachments
BrakeCylinderFinalDesignFron.jpg
BrakeFulcrumBracket.jpg
BrakeCylinderFinslDesign.jpg
BrakeFulcrumBracketStockCutoff.jpg
PilotTruckPivotPinLock.jpg
PilotTruckPivotPinLockCutOff.jpg
Odyknuck
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Odyknuck »

BTW Guys, the next time I consider deviating from the plans and specs feel free to remind me of how much extra work and lost time this has cost me! :roll:
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Bill Shields
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Re: Railroad Warehouse 2.8.2 Mikado Logger Build

Post by Bill Shields »

:mrgreen:
If you do not mind me asking...

Where was the cylinder shown on the original plans?

I took 20+ years to build my 2-8-0 in that scale.

Changed frame, drivers, brake rigging and built 2 boilers before it was up and running.

Yes.. perhaps we are both deviants -> so you will get no tears from this crockadile
Too many things going on to bother listing them.
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