Had some fun garage time here and there over the last few week and I have been playing around trying to workout a cheap, not too difficult to make and also a reasonably decent looking mast for the catenary system.
LGB masts are out of the question as they are $60- $80 per mast here. They look great thou.
First protype, needs a few mods.
View attachment 352869
Materials used,
10mm steel square rod for the mast. Cheap and easy to get, not as good looking as a ally H beam.
5mm round steel rod for cross bar. I have this already.
2mm round steel rod for diagonal support. Cheap
5mm brass rod for insulator supports. Easy to work with
7mm brass rod for the insulators. Easy to work with
1.65mm copper wire for hooks. Had this
base 1.5mm tinplate. Offcuts
Cost per mast $6-8, if I had to buy it all. Probably be around $5 including paint.
The steel bits are welded in place, brass/copper bits soft soldered together and the bars are threaded into the mast.
View attachment 352870
Given a spray of cold gal paint.
The base of this one is drilled for a 8mm rod to be hammered into the ground, this way a longer rod can be hammered in till its secure and trimmed to size. The mast then slipped over the rod.
Others masts will have a 100mm longer base and turned round to 8mm where there is concrete blocks to drill into.
For any going on a base board they will be turned round and threaded.
View attachment 352871
Doesn't look too bad in place, if you can pretend the square bar is a H beam

.
Needs the insulators painted black and a foam "concrete block" base added.
Somewhere I have some sheets of scale plastic bolt heads, 4 on each base would be a nice detail.
The masts will hold a catenary wire and support wire.
As well as a earthing wire at the back of the pole and 2 feeder wires at the top.
The extra wires are for looks and maybe they will give the actual catenary wires some protection from knocks?
Some changes to the next one.
For looks,
Make the mast 30mm taller, so there's a bigger gap from the crossbar to the upper cable support.
Make the crossbar 100mm instead of the 80mm it is now, doesn't quite look right and the masts will be further from the track centre.
Drill the diagonal support into the mast instead of welding it and make the angle less.
Make the catenary wire horizontal support 5mm bar 20mm shorter and have a longer wire, again doesn't look quite right.
Make the upper cable support 10mm shorter and heat the bar to get a tighter bend, again it doesn't quite look right.
For ease of construction,
Use a smaller dia. copper wire, say 1mm for hooks, these ones don't bend round easily.
Make collars on the insulators, now they are drilled and the wire goes right through them into the support bar and they are soldered together and in place.
That's fiddley to do, a soldered tight fitting collar would be stronger and easier to do.
Any ideas or thoughts feel free to share them.