Examining the On30 Bachmann Outside Frame 2-8-0

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narrowgaugecdb

New Member
Harold,

Do you think that this engine has enough tolerance at the wheels to be modified into a On3 locomotive?
The distance between the wheels in On3 are 1/8 of an inch larger than On30.
I'm looking forward to your reply.
Sincerely
Constantin
 

hminky

Member
Bob Brown in the latest Narrow Gauge & Short Line Gazette reports that it can and has be done.
I believe the locomotive was a standard Mexican three foot gauge locomotive that was 30 inch gauged for the Zacatalan branch which had been regauged from two foot.
The Zacatlan branch Consolidations are even heavy for a typical Mexican three footer. Since the locomotive was made from the Zacatalan branch survivor in Montana it should be a three footer.

Harold
 

hminky

Member
The distance between the wheels and the frame is .074 per side and the difference in gauge is .050 per side. It should work.

Harold
 

JeffShultz

Stay off the tracks!
Okay, what part of it is the frame, and what is it outside of that makes it different from other steam locos?
 

hminky

Member
JeffShultz said:
Okay, what part of it is the frame, and what is it outside of that makes it different from other steam locos?
The frame is the under carriage where the wheels ride, on most standard gauge locomotives the frame is inside the wheels. On narrow gauge and early standard gauge locomotives the frame was put outside the wheels.

It gave the early Stephenson valve gear more room and also gives a more stable footprint on narrow gauge locomotives.

Harold
 

narrowgaugecdb

New Member
hminky said:
The distance between the wheels and the frame is .074 per side and the difference in gauge is .050 per side. It should work.

Harold
Harold,
Thank you for the info.

I have visited your website many times and liked it very much.
By the way, did you go back to On30?
If you did, than I believe that this was a wise decission.
I'm looking forward to updates on your website. Keep up the good work.
Sincerely
Constantin
 

hminky

Member
narrowgaugecdb said:
Harold,
Thank you for the info.

I have visited your website many times and liked it very much.
By the way, did you go back to On30?
If you did, than I believe that this was a wise decission.
I'm looking forward to updates on your website. Keep up the good work.
Sincerely
Constantin
Yes, the old eyes don't see small anymore. The 1870's in OO/HO was a good concept but I was working less and less on equipment. Seeing the Bachmann Consolidation sealed my return to On30.

Right now I am putting a Tsunami in it and backdating the loco to 1905. I should have an article by next week:eek: .

Harold
 

narrowgaugecdb

New Member
Hey Harold,

FYI, I have bought the same locomotive from Bachmann yesterday morning @ Caboose Hobbies in Denver.
I will try to modify it into an On3 machine.
I will let you know how it went later on.

Have a nice day.
Constantin De Bock
 




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