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 1/72 Scale Narrow Gauge Modeling

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T O P I C    R E V I E W
hminky Posted - 10/03/2018 : 2:35:00 PM
Found this idea on the net but was written up in Kalmbach's "Model Railroad Planning 2018". The issue featured Doug Tagsold's Colorado & Southern. The premise is using HO gauge equipment to represent 1/72 scale narrow gauge.



Liking out-of-the-box thinking this is my take on the idea:


Thank you if you Visit


15   L A T E S T    R E P L I E S    (Newest First)
Bill Gill Posted - 02/10/2019 : 11:05:48 AM
Nice. Very credible and narrow gaugey looking.
hminky Posted - 02/10/2019 : 10:46:11 AM
Finally got the "narrow gauge" look on the MDC/Roundhouse cars and loco.

Easy narrow gauge
hminky Posted - 02/07/2019 : 7:31:24 PM
Dart Castings supplies a line of OO scale wagons and figures which are well done. OO scale stuff scales out well in 1/72.

Dart says delivery takes 21 days, yup.

hminky Posted - 02/03/2019 : 1:24:06 PM
Haven't done this in a while.

Found these vintage 1/72 cars and trucks.

Go to:


Made me think about late era narrow gauge. If you extend the cab below the footboard with a 1/8x1/4 piece of styrene and add a new cab side like our mock up, easy late era narrow gauge.

Doug Tagsold used the MDC cars with the HO trucks with 33" HO wheels. Substituting 24"(HO 28") wheels and shorter wheelbase Tahoe trucks makes the cars more "narrow gaugey"

hminky Posted - 12/19/2018 : 10:47:23 AM
While searching for a suitable proto railroad was perusing books from my late brother's collection. Found "Milwaukee Road Narrow Gauge" and found these pieces of narrow gauge and near 1/72 scale drawings. The box matches the size of our Mantua with the same truck configuration and they had an 1880 caboose that is the same size as the Roundhouse caboose.

An early Granger road fits the available locomotives and rolling stock. Lots of them out there in the heyday of narrow gauge.

hminky Posted - 12/18/2018 : 10:08:15 PM
1/72 works with a ratio of 72/87 or 83%.

Scale55 should be using S scale equipment on S scale track, 55/64 or 86% for narrow gauge. S scale track gives us four foot gauge in Scale55.

But the On30 equipment is S Scale sized so that works for the right gauge on HO gauge track.

That is an On30 mogul regauged to S-gauge.

The HO Mantua Ten-Wheeler is the same size as an S-scale UP 119 from the Golden Spike at Promontory. Makes a 55n3 4-4-0, shown here with a Scale55 drawing.

That is why the Bachmann HO 4-4-0 works in Scale172.

You can't build two foot with n-scale equipment or any HOn30 equipment. All of it is too small.

RyanAK Posted - 12/18/2018 : 9:23:15 PM
So... HO standard gauge track and mechanisms in 1/72 scale are ~47 gauge. Then N scale standard gauge track and mechanisms are true 2ers in 1/72. Have you looked at anything there? Im not too familiar with N scale steam, but there seems to be a ton of reliable diesel mechanisms that could provide interesting possibilities for locomotives. HO standard gauge early cars on HOn30 trucks/wheel sets with 1/72 figures and structures gives you easy Maine narrow gauge in a small scale? If something could be done for motive power.
railman28 Posted - 12/18/2018 : 6:22:31 PM
That's very interesting. Thanks

hminky Posted - 12/18/2018 : 5:24:39 PM
Originally posted by railman28

Harold, it certainly is working. The freight trains are looking good and Narrow gauge. Are the passenger car bodies tall enough?

The HO cars are taller than the early narrow gauge cars.

railman28 Posted - 12/18/2018 : 5:09:49 PM
Harold, it certainly is working. The freight trains are looking good and Narrow gauge. Are the passenger car bodies tall enough?

RyanAK Posted - 12/18/2018 : 4:31:43 PM
Here's the Jennings Bros. operation in Lopez, PA. They were 44" gauge from 1892 until re-gauging to standard in 1900. I think this would be a great prototype for Scale172.

(Mike Hohn, there are your tanbark gons!!)

The railroad I'm currently working on is the 3' gauge White Deer & Loganton. Most of the handful of structures I'll need for this layout will be scratch built anyway, so no worries going to 1/72 there. The Climax is my challenge. Otherwise, if the 3' prototype looks close enough on scale 47" track...

hminky Posted - 12/18/2018 : 4:31:25 PM
Old time trains always look better in black and white.

RyanAK Posted - 12/18/2018 : 4:19:47 PM
Thanks for updating here, Harold. As I said over on MRH, this does look pretty good. I'll have to take a hard look at this. As I said... my motivation is to get a particular locomotive modeled (3' gauge 25-ton Class B Climax) and the Bachmann HO mechanism scales out pretty darn good in 1/72... except for the gauge. If I decide I can live with the 10" extra between the rails, I may have a path forward. Lots to consider, but I like the thought you've put into this and really appreciate your efforts!

Bill Gill Posted - 12/18/2018 : 4:04:59 PM
That does look good!
hminky Posted - 12/18/2018 : 3:50:06 PM
What about track?

We are using HO Kato Unitrack to represent our early era narrow gauge track. The funky alternate universe HO spacing looks great for our track.

In our HOn30 adventure we found that the track can be painted at the bench and blended in with "fur grass" or Sculptamold/latex paint mixture.


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