I got a bit more info on the operation of the little locos from my friend. Seems they were something else to operate. Note that the charging connection he speaks of carried 900 pounds of air pressure. Incidentally, to recharge the tank, there was a three piece metal arm made of piping with ball joints that you swung out from a hook on the rib and lined up with the charge port on the locomotive, They were a kick to run/play with but the worn out throttle linkage made them very touchy. The things would take off and go like a bat out of....
The braking system was somewhat of an after thought and just as worn out as the go system. To slow down, just put the thing in reverse, carefully. The smaller units were put in use about 1907.
(a couple of days ago... )
The balance charging plugs and sockets finally arrived from China. I whittled a set to make them looser, just a snug fit for charging is all that is necessary. Today I got the socket mounted and worked on the charging circuit. Hopefully tomorrow the wiring will be complete and I can button up the operator's area. Then a few more details and some weathering.
I got all the wiring sorted out, made the operator's station complete, put the fill valve on the tank... and got it ready to paint. Then I thought, let's play a bit and run it for a while. NOPE, it wouldn't work. I ripped it all apart and found the main positive wire on the switch had broken off. fixed it... tried it again, NOPE, another wire had broken off the switch! Grrr... HAVING FUN!
I have repaired it for the third time and tested it and then potted all the wiring in glue. Drying now... I hope this doesn't turn out to be a shelf sitter, inert model. It is SO close. I'll win... glue drying.
I just thought of a good way to make the charge port 'invisible' on nearly any locomotive. Put it somewhere on the model where there is a 'feature', like the air fill valve on this model or a dome or port... anything that could conceal the socket for charging. Then take a plug and glue the 'feature' on it. Remove the feature for charging and put it back and the port disappears!
Wish I had thought of that sooner.
Success! I'm too tired to post pics tonight, but I got it working. OMG, I hope the batteries last forever! It is an absolute BI&$H to put together, but it looks good now I think. All the wires are hidden now. I'll slop some flat black on it tomorrow and post a few pics.
It had an ANNOYING lurch going forward, in time with the wheel rotation. Grrr... not in reverse. I looked at everything and saw nothing that would cause such a thing. I almost gave up and then watched it once more. The rear axle isn't completely straight, but not enough crooked to cause what I was seeing. I think it was balance... the slight wobble caused the thing to 'rock' when going forward, but not in reverse. That makes sense. I draped a slab of lead over the front end and it runs fine now! I had planned a lead ballast as part of the front bumper so that will work out. I'll make the clamp for the front of the air tank out of lead too. I think I won this round.
With some paint applied to the new parts, she's looking spiffy. Still some detailing to do and weathering and it needs couplings, but it WORKS great!
The camera angle makes it look like it is running up hill, but it isn't.
I remembered to drill a tiny hole so I could see the receiver status light... the green spot on the sander.
Video to follow as soon as it gets converted and uploaded.
Here is the video. Note when I stop to back into the shed that I stopped on the switch. I had to move forward a bit and it just eases on. Great control with these radios. That switch also still has a huge lump in it. I have a switch stand ordered so I'll fix it then. https://www.youtube.com/watch?v=G61f9Cu ... e=youtu.be