Category Archives: Guinness 0-4-0

Guinness 0-4-0T Donor Drive

My first thought was to look at the Bachmann On30 Gas Mechanical I have in my possession.  Based on suggestions from Desilets at the forum I also looked at the Northwest Short Line Stanton drive.  BigLars pointed me to a critter thread that provided photos with scale rulers for a number of HO and On30 locomotives.  From that list I also took a look at the Bachmann HO 70 Ton Switcher. Here’s how their dimensions compare to the prototype – first the Bachmann, then the NWSL, then the Bachmann.  The Bachmann estimates are from the scale ruler.

Component Model Scale Conversion Prototype
Driver Diameter 0.455 48 21.84 22
Wheelbase 0.934 48 44.832 36
Gauge 0.629 48 30.192 22
Northwest Short Line Stanton Drive
Driver Diameter 0.46 48 22.08 22
Wheelbase 0.897 48 43.056 36
Gauge 0.629 48 30.192 22
Bachmann HO 70 Ton Switcher
Driver Diameter 0.4 48 19.2 22 Estimates
Wheelbase 0.9 48 43.2 36 Estimates
Gauge 0.629 48 30.192 22

The drivers for all three are just about dead on.  Track gauge is off by 8″ as expected.  The wheelbase is a bit too long for all three relative to the prototype.  I wonder how it would look.  The following shots compare the Bachmann 0-4-0T to the Guinness 0-4-0T.

Bachmann Gas Mech


Well, the wheelbase is a bit long.  But it is not so obvious.  Sorry, I’m not a rivet counter.  For my purposes, all three drives pass the test.  If I went with the Bachmann, I would need to rework the counterweights (plastic) and fabricate a vertical rod to the pistons.  With the Stanton and Bachmann 70 ton drive, I would need to fabricate everything.  Wheels are solid in all three cases, just like in the prototype.

Both Bachmanns are DCC ready, and I wouldn’t have a major problem tucking away the electronics.  With NWSL, I would need to add a decoder.

The Bachmann is sold out.   It also has had problems with gears breaking.  The Stanton is more expensive, but is available.  I suspect performance wouldn’t be a problem.  With the amount of work that will go into this model, I want to do it right.

One issue, however.  The Stanton drive lacks the bearings to mount the rods.



So does the Bachmann 70 tonner.  I bit the bullet and bought one on eBay for $50.  There are plenty of critters in my future and the engine provides me with two trucks, so there is an extra for mistakes, parts or possibly another critter, or one with two trucks.



Of course, drilling holes in the wheels near the rim could solve the bearing problem with both drives.  With the right jig, I could probably drill the holes, laying a drive on its side.  A bit of brass rod in the holes would provide the bearings.  Hmmmmm.  Have to give it some thought.

Guinness 0-4-0T Drawings

Bob Bath at 16mm Narrow Gauge Modelers posted a series of drawings used in creating his model of this locomotive.  Note that his model is live stream and many of the parts relate to constructing a live steam model.  If the model is to be electrified, many of these parts would be unnecessary.

01 Left Hand GA
01 Left Hand GA2
02 GA Top View
03 Main Frames
03 Main Frames-2
04 Frames Fittings
04 Frames Fittings-2
05 Running Gear
06 Couplings
07 Motor Parts
08 Boiler Assembly
09 Boiler
10 Boiler Fittings
11 Gas Burner Tank
12 Lubricator and Handrails
13 Side Tanks
14 Foot and Top Covers
15 Building Notes

Bob models in a scale that is 16mm to the foot.  Based on what I’ve read that comes out to 1:19.05 scale, very close to 1:20.3 scale which is the dominate large scale narrow gauge implementation.  These drawings and their dimensions relate to fabricating a live steam engine to 16mm scale.  They could be used with very few modifications in creating a 1:20.3 model to run on common garden railroad track in the US.

Principal dimensions of the prototype were as follows:

Cylinders (two) : 7in diam x 8in stroke
Wheels : 1ft 10in diameter
Wheelbase : 3ft 0in
Boiler : 2ft 5in inside diameter
Boiler tubes : 64 x 1½in inside diameter
2ft 103/8in long
Boiler pressure : 180 lbs per sq in
Heating surface : 13.75 sq ft (firebox)
72.61 sq ft (tubes)
Fire grate area : 3.24 sq ft
Capacities : 3½ cwts coal
80 galls water
Axle loading : 3.6 tons leading axle
3.8 tons trailing axle
Total weight : 7 tons 8 cwts
Tractive effort : 2,900 lbs
Max. loading : 75 tons (level track)
18 tons (1 in 40 grade)

Track gauge was 1 foot 10 inches (22″).  That puts it 8″ short of the 30″ gauge of On30.  While the difference is significant, it is roughly the same as the difference between On30 and On3.  A fairly representative looking locomotive could be constructed to run on ON30 track, which greatly expands the drive line options.

Conversion to On30 would require some rescaling of the drawings.




Guinness Dublin 0-4-0T Steam Locomotive

These are photos taken in October of 2013 while on the Guinness tour in Dublin, Ireland.  The area where the photos were taken was relatively dark and they were taken on my iPhone which was running out of juice.  Consequently they are of poor quality and do not do justice to one of the most compact steam engines I’ve seen.


Cutout in the lower part of the engine showing the piston.


The crankshaft.


Front view including smokestack.


Rear view showing fire box.



Driver arrangement is 0-4-0T.

Some day I’m going back with a decent camera.