HOn30 Trackwork Mini HowTo

Prototype

Standard gauge trackwork somewhere in New England. Wood ties and nails are still used in 1996. You can see a rail anchor in the third picture, a detail very seldom modelled.

A friend gave me some photos from the 3 foot narrow gauge railroad White Pass and Yukon Route. Maybe original tracks from 1898.

You can see a 76 cm narrow gauge line crossing two standard gauge tracks in Weiz, Austria. The Switch is in Bikfeld. The trackwork looks very american for my opinion.

Some industrial 60 cm and 75 cm gauge trackwork in Switzerland.

Waldenburger Bahn, the only 75 cm gauge commuter train in Switzerland (probably in the world).

Narrow gauge double slip switch. RhB Italy/Switzerland.

HOn30 Tracks

Rails

One of the narrow gauge advantages was the use of lighter rails and therefore the lower investment. Lighter rail looks better and is more prototypical. The rails were 33' long til about 1925.

Rail Code	Height [mm]	Weight [Pounds per Yard]	Weight [kg/m]	DIN 5901
40	1.0	40	18.3	S 18
55	1.4	80	33.5	S 33
70	1.8	100	54.5	S 54
80	2.0	136	64.9	S 64
100	2.5	156	-	-

Quotation from Railway Track and Maintenance (1926): For ordinary main-line service, 80 lb. is about the minimum weight and 100 lb. rails are in general use.

80 lb. rail from A.S.C.E: height 5" (HO 1.46 mm), base 5" (HO 1.46 mm), this corresponds in HO to code 55, 100 lb. corresponds in HO to code 70. Early narrow gauge lines used 40 lb. and lighter rail.

Quotation from Maine Two Footers On2 FAQ:

• SR&RL rail weights, information from 1916, but weights probably did not change too much after then (before that is not a simple answer)
  • Farmington - Strong - Phillips weights varied from 50 - 52 - 56 & 58 1/4 lbs (most of it 10.48 mi. was 52lb).
  • Phillips to Madrid Jct. 50 lb rail laid in 1919
  • Almost everything else was 35 lb rail
  • At time of abandonment, there was a reported 2 mi. of 60 lb rail
• B&B Rail was 25 lb, 30ft lengths.
• B&SR Rail Weights
  • Bridgton Jct to Bridgton, prior to 1909: 30 & 35 lbs
  • Bridgton Jct to Bridgton, after 1909 : 50 lbs.
  • Bridgton yard relaid with 50 lbs rail in 1910

A good compromise is to use code 55 rail for HOn30 and code 70 for standard gauge. Ties

• Standard gauge until 1918: 8' long (HO 28 mm)
• Standard gauge after 1918: 8.5' long (HO 29.8 mm), sometimes 9' (HO 31.5 mm)
• width: 7 .. 9" (HO 2 .. 2.6 mm), thickness: 7 .. 8" (HO 2 .. 2.3 mm)

Ties

PRR practice (standard gauge)

center-to-center main lines	22"	6.4 mm
center-to-center sidings	24.8"	7.2 mm
center-to-center yards	28.3"	8.3 mm

Sächsische Bahnen (Saxonian Railways, Germany), 750 mm gauge

Width	200 mm	2.3 mm
Length	1.7 m	20 mm
center-to-center main lines	750 mm	8.6 mm
center-to-center sidings	830 mm	9.5 mm

SR&RL

Width 5"	1.5 mm)
Length 5'	17.5 mm

overhang (5-2)/2 = 1 1/2"

Campbell Ties:

HO	1.3 x 2.4 x 28 mm
H0n3	1.3 x 2.4 x 21 mm

They are relative thin (1.3 mm), to prevent splitting (nails), less gravel is needed to cover the ground.

Micro Engineering full profile Ties (37-103):

HOn3	1.7 x 2.3 x 23.5 mm

PCB ties are about 1.6 mm / 1/16" thick)

Fast Track HO narrow gauge PCB crossties (in HOn30 templates):

HOn3	1.6 x 2.0 x 21 mm

PCB crossties are 13-1/2 scale feet long by 7 scale inches wide (.080"), and are available in 1/16" and 1/32" thickness.

I cut my ties from a 1.6 x 100 x 160 mm printed circuit board PCB (in Switzerland it is available from Distrelec, Partnumber 450335, for 2.50 CHF that's about $2). I prefer FR-2 PCBs, because the FR-4 (glass/epoxy) makes your sawing blades dull. I saw about 2.3 mm stripes from the PCB with a fretsaw and cut the ties to length (20 mm) with a wire cutting pliers. I choose 8 mm center-to-center distance for my pike.

The Micro Engineering ties have about the same thickness and width and can be used together with my PCB ties. It's enough to insert a PCB tie for about every 4th tie.

FR-2 is composite material made of paper impregnated with a plasticized phenol formaldehyde resin (Synthetic Resin Bonded Paper (SRBP), Bakelite, Lamitex, Paxoline, Pertinax)

FR-4 is a composite of a resin epoxy reinforced with a woven fiberglass mat (epoxy resin bonded glass fabric (ERBGF), Veroboard) printed circuit board (PCB)

Spikes

Cut spikes are about 6" long, the spike head is about 1 9/16" x 1 5/16" in HO is this 1.75 x 0.46 x 0.38 mm. The small spikes from Micro Engineering are 8.0 x 1.7 x 1.0 mm, they are far too large. You can build your own spike from 0.4 mm wire, you have to drill holes into the ties too. That's why I omit the spikes.

Tie Plates

Tie plates were not always used for narrow gauge tracks. But normally they were found at least on turnouts and in curves. They are 5" to 10" wide and about 1/2" (HO 0.15 mm) thick. Tie plates for HO are too small and too difficult to build for me. I omit tie plates on my tracks.

Tips

Tools needed

• Moto tool with a cutting disc or alternative needle files (Swiss files) and lot of patience
• Regulated Soldering iron e.g. from Weller
• Fretsaw
• Wire cutting pliers
• Needle nose pliers
• NMRA Standards gage for HO and N
• track gauges for HO and N e.g. from Rail Craft

Soldering tips

• use a regulated soldering iron e.g. from Weller
• use small diameter electronic grade solder
• flux is already included in the electronic grade solder (additional flux is not needed)
• solder only from the outside of the rail
• clean all surfaces: the rail, the PCB, and the tip of the soldering iron (dirt is the enemy of a good quality soldered joint)
• heat both the PCB and the rail before adding the solder
• remove excess solder with desoldering braid (Soder-Wick)

How To Scratch Build a Narrow Gauge Standard Gauge Crossing

As far as I know there is no commercial narrow gauge standard gauge crossing available. It takes me about 4 h to build a "diamond" from scratch. You need only only some code 70 rails and PCB cross ties.

Step by step instructions to build a crossing from scratch:

Print out a template, e.g. from Fast Tracks http://www.handlaidtrack.com/ the HO 30° Crossing Template. Reduce one leg to 9 mm (HOn30) gauge and glue the template on PCB (I use white glue).

How To Convert an Atlas N Code 55 Turnout to HOn30

Commercial available HOn30/H0e/009 turnouts from Peco, Tillig, Technomodell, and Roco have too heavy rails (Code 80/83) and too wide angles (15 °, less than #4). You can build the turnouts from scratch, but for me it is difficult and to time-consuming to build the heel of the switch (especially the hinge) and the frog. The N code 55 turnouts from Atlas are available with frog numbers #5 and #7 (for details see http://www.atlasrr.com/Trackmisc/ncode55.htm). Code 55 #5 turnouts are exactly what I am looked for. They cost about $10 each. The only thing you have to do is to replace the small plastic ties with larger PCB ties.

Print out a template, e.g. from Fast Tracks http://www.handlaidtrack.com/ the HOn30 #5 Turnout Template and glue the template on PCB (I use white glue). Lay the N gauge turnout on the template and mark with a pencil the frog and the toe of point on the template. Remove the rails from the plastic ties. Remove the pins from the frog and the guard rails. Glue the crossties to the template. Solder the straight stock rail to the ties, use a straight edge as a guide.

Solder the frog to the ties. Use a NMRA N gauge to check the distance between the stock rail an the frog. The lead (distance between toe of point and frog point) is 75 mm. Solder the second stock rail to the ties. Check the gauge between the stock rails and between the stock rail and the frog. Solder the two rails to the frog heel (frog point rail) and to the frog toe (closure rails). Use a N track gauges to ensure the right distance between the rails. Solder the two guard rails to the rails.

Solder the switch tabs to the heel of the point. Make sure that the rails are in line. Cut gaps into the copper foil ties.

Put the turnout in warm soapy water and remove the turnout from the PCB. Fill the gaps with filler, sand and paint the turnout.

HOn30 #5 Turnout in Comparison With Shinohara HO #6 Code 100

-- PeterSchmid - 2011-05-09