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Re: Project: N&W class J on 5"gauge

Posted: Mon Jul 23, 2018 12:52 am
by Steamchris
Morning Guys,

in the last Week it was abel to use the CNC of my Company. I made the second Mainrod , same way i've shown in the Report. We've mounted the rod and started the Air compressor ...... look what happens...

https://youtu.be/IHEMVVrCLeA


The Engine runs smoothly at 7 PSI ....we are happy


All the best
Chris

Re: Project: N&W class J on 5"gauge

Posted: Mon Jul 23, 2018 3:38 am
by Fender
Very smooth and impressive!

Re: Project: N&W class J on 5"gauge

Posted: Mon Jul 23, 2018 6:48 am
by Steamchris
Thank you Dan

Re: Project: N&W class J on 5"gauge

Posted: Mon Jul 23, 2018 1:45 pm
by Berkman
very neat! Are those air tanks between the frame ?

Re: Project: N&W class J on 5"gauge

Posted: Mon Jul 23, 2018 1:57 pm
by Steamchris
Hey Berkman,

yes, the pipe between the frame is the Air Tank.

Regards

Re: Project: N&W class J on 5"gauge

Posted: Mon Jul 23, 2018 3:25 pm
by Harold_V
Steamchris wrote:
Mon Jul 23, 2018 12:52 am
The Engine runs smoothly at 7 PSI ....we are happy
As you should be! That's a beautifully built engine. I'm overly impressed by how smoothly it runs.

H

Re: Project: N&W class J on 5"gauge

Posted: Tue Jul 24, 2018 12:27 am
by Steamchris
Hi Harold ,

thank you, next weekend first test with steam by a separately boiler.

Regards
Chris

Re: Project: N&W class J on 5"gauge

Posted: Wed Jul 25, 2018 5:09 am
by AusDan
Thats one smooth, quiet drive train...what kind of tolerances do you work too?

Re: Project: N&W class J on 5"gauge

Posted: Wed Jul 25, 2018 12:53 pm
by Steamchris
Ausdan,

tolerances of what Kind of Parts do you mean?

Engine bed, Rods CNC milled so tolerances from point to point are very small nearly to zero , Bolts are polished to 0.01mm smaller then the roller bearings. Axels can move +/- 2mm, Main wheel is rigid.



Regards
Chris

Re: Project: N&W class J on 5"gauge

Posted: Tue Sep 25, 2018 5:05 am
by Steamchris
Hi Guys,

just want to share some pictured about the progress om the lead Truck....

IMG-20180919-WA0008.jpg
IMG-20180919-WA0009.jpg
i will keep you informed about the next steps.

All the best
Chris

Re: Project: N&W class J on 5"gauge

Posted: Thu Nov 08, 2018 1:15 am
by Steamchris
Hello Guys,


some work is done on the Engine Truck...

here you see the bottom of the truck and the half shells where the rockers sits.
IMG-20181105-WA0004.jpg
and here the upper part with the angles..
IMG-20181025-WA0010.jpeg
we have to laser the rockers , the 3D model is ready...
IMG-20181102-WA0028.jpeg
and a sample how it looks under the engine...
IMG-20181105-WA0005.jpg
all the best
Chris

Re: Project: N&W class J on 5"gauge

Posted: Sun Nov 11, 2018 9:28 pm
by Rob Gardner
Chris, all I can say is "WOW"! Wish I was this far along my C&O J-3a. Love seeing your construction techniques as the Greenbrier are of the same generation of steam as the N&W J's. Especially your pilot truck. Giving some good ideas, for sure.

Would love to see even more photos of the lead truck frame if you have any.

Thanks,

Rob