3/4" Scale J1e

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Bill Shields
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Re: 3/4" Scale J1e

Post by Bill Shields » Mon Feb 18, 2019 10:59 am

it does not get run much in the past 25 years...
Too many things going on to bother listing them.

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JBodenmann
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Re: 3/4" Scale J1e

Post by JBodenmann » Wed Mar 13, 2019 9:28 pm

Hello My Friends
Been fiddling around with the little Hudson, just having too much fun. Here are some little details that have been added. The engine truck brake hanger pins had some keepers to prevent them from falling out. The top photo here shows a drawing of them and the start of the keepers that were added to the truck frame. The second photo shows the keepers and the holes in the truck frame where they go and the bottom photo shows them epoxied in position. They were stuck in with some Gorilla glue epoxy. This is some good glue. The parts were all bead blasted before glueing. The bottom photo also shows the pin with a #0-80 bolt threaded into it. The pins were drilled and tapped so that a bolt could be used to withdraw them as you can't get at the back side.
Attachments
PinKeeper1.jpg
PinKeeper2.jpg
PinKeeper3.jpg

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JBodenmann
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Re: 3/4" Scale J1e

Post by JBodenmann » Wed Mar 13, 2019 9:49 pm

Here is some more. The brake beams, brake heads, shoes, and keys. The brake heads have replaceable shoes that can be changed by removing the key. Just like the prototype. Just because this is 3/4" scale we can't be getting lazy now :lol: . These engine truck brakes have been quite a delightful little puzzle. Fortunately the New York Central historical society provided drawings for all this little baloney. The fourth photo from the top shows a little pin that connects the push rod to the brake beam. In the third photo down it is the pin on the right hand end of the push rod by the pencil eraser. The cotter pin is .020". The push rod and all the little pins were made of 11L 14 steel. This stuff machines remarkably well. The bottom photo shows the push rod trunnion that the push rod passes through with its #3-48 adjustment and lock nuts. This is where the brake rigging is adjusted for wear. The little plate that fits to the end of the brake beam and holds the trunnion in place has two #00-90 bolts holding it together. In this photo you can also see the brake hanger pin keeper with it's #000-120 screw and nut. These sizes used to seem really small to me but after using them for a while they don't seem so tiny anymore.
Attachments
Beam1.jpg
Beam2.jpg
Brakes!.jpg
LittlePin.jpg
Pinion.jpg

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JBodenmann
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Re: 3/4" Scale J1e

Post by JBodenmann » Wed Mar 13, 2019 10:10 pm

Here are some photos of the brake cylinder. The top photo shows a set up for polishing the bore, which is 1/2". A wooden dwell with a slot cut in it has been chucked in the drill press. A small piece of wet or dry paper has been inserted in the slot. Then this is used to polish the bore. I started with #220 grit, then #600, and then #1200 grit. Then a piece of cloth was used with some metal polish and we have the result you can see in the third photo. You can get a mirror finish using this method. The next photo down shows most of the bits and pieces for the brake cylinder. The cylinder heads, the hollow piston rod, the piston with it's teflon cup, and the #0-80 x 3/16" tee bolts and nuts. Still to be made are the push rod and brake lever. There will be a 1/16" elbow and 1/16" flexible tube connecting the cylinder to the brake piping. These castings are all available if you are interested. I hope to get the engine truck all buttoned up this week and then the smoke box will get some attention.
See you in the funny pages...
Jack
Attachments
Cylinder1.jpg
Cylinder 2.jpg
Cylinder3.jpg
Cylinder4.jpg
Cylinder5.jpg

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Greg_Lewis
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Re: 3/4" Scale J1e

Post by Greg_Lewis » Wed Mar 13, 2019 10:50 pm

Jack:
Love that little stuff. It's a hoot to work with. Where do you get the 000-120 screws?
Greg Lewis, Prop.
Eyeball Engineering — Home of non-interchangeable parts.
Our motto: "That looks about right."
Celebrating 30 years of turning perfectly good metal into bits of useless scrap.

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JBodenmann
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Re: 3/4" Scale J1e

Post by JBodenmann » Thu Mar 14, 2019 10:34 am

Hello My Friends
Tiny fasteners can be purchased from JI Morris. They are the only ones I know of that have #00-90 miniature hex head bolts. They also have flat head self tapping screws (wood screws) down to #000 x 3/32". They are made for circuit boards and are individually hand de burred under a microscope as you can't have metal chips rattling around circuit boards. Be prepared though, they cost $1.25 each and up. Real handy for wood cabs and bobber cabooses and such.
Jack

AnthonyDuarte
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Re: 3/4" Scale J1e

Post by AnthonyDuarte » Thu Mar 14, 2019 2:36 pm

Jack,

I apologize if I missed the information, but what are the overall dimensions of your brake cylinder casting? I may need one for the 3/4" pacific.

Anthony

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JBodenmann
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Re: 3/4" Scale J1e

Post by JBodenmann » Thu Mar 14, 2019 9:30 pm

Hello My Friends
The brake cylinder for the engine truck is 1/2" bore and the piston has a 7/16" stroke. I have another small brake cylinder set that has a 5/8" bore and the piston has an 11/16" stroke. The larger cylinder is not set up for a hollow piston rod and loose push rod but all that would be required to change that would be to modify the rear cylinder head. I have both sets on the shelf.
Jack

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JBodenmann
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Re: 3/4" Scale J1e

Post by JBodenmann » Fri Mar 15, 2019 12:09 am

Hello My Friends
Here is some more progress on the engine truck brake rigging. The top photo is of the double clevis, making the mold for this little rascal was a bit of a brain teaser. It took two tries to get it right...this is how we learn. The second photo shows the double clevis on the bottom end of the brake lever. This is the connection between the lever and the first, or live equalizer. The third photo shows how the push rod fits into the hollow piston rod. This push rod is a loose fit into the piston rod and this allows it to move up and down slightly as the top end of the lever travels in an arc. The next one down shows the truck upside down. Here you can see how the double clevis connects the lower end of the brake lever to the live equalizer. The links between the equalizer and the brake beams remain to be made but you can see how it all works. The brake beams on the left end will have links connecting them to the dead equalizer and the center hole on the equalizer will link to the truck frame. There will be more photos when it's all done. And lastly the bottom photo shows the mostly completed engine truck. There are still some supports for the center of the push rods and some safety hangers, also the safety chains. Then on to the smoke box. There are some really cool little bits here in the shop from Brain Keim, marker lamps and Okadee smoke box door hinges. The castings for the smoke box door dogs are also on hand along with the cut lever brackets for the pilot. Also one of John Hudaks ultra cool Pyle National Headlamps. As mentioned before masters will be made for new stack castings, both main and auxiliary, superheater access hatch dogs, throttle shaft support, flag stanchions, air pump shields, and various handrail stanchions. Having too much fun :D
Jack
Attachments
DoubleClevis.jpg
BrakeLever.jpg
BrakeCyl.jpg
BottomSide.jpg
EngineTruck.jpg

Asteamhead
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Re: 3/4" Scale J1e

Post by Asteamhead » Fri Mar 15, 2019 2:09 pm

Hello Jack,
Nice to see that (later on) hidden jewelry. Thanks for explaining the making!
Asteamhead

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JBodenmann
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Re: 3/4" Scale J1e

Post by JBodenmann » Sat Mar 16, 2019 11:32 am

Hello My Friends
Thank you Asteamhead. It's a beautiful warm day here in the mountains ,(in the 60's) the first for weeks and the mud has mostly dried up, so instead of the little Hudson the focus will be on the Alcalde & Coalfield railway today and tomorrow. Pavers and steaming bays to slam down.
I might get tired, but I never get bored :lol:
Jack

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JohnHudak
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Re: 3/4" Scale J1e

Post by JohnHudak » Wed Mar 20, 2019 9:11 am

Amazing work as usual Jack...!
Hopefully someday I'll get to see that beauty in person..!
John

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