After a lot of back and forth with myself I decided to strip the repaint the cab with the correct decals to the era I model as well as changing out the digitrax decoder for an ESU loksound micro. I then added a custom made sound set I created using their software and lokprogrammer.
After about two months of work the crane is finally completed. Continue reading to learn how it was done.
Hello fellow modelers and enthusiasts, thanks for stopping by. I, due to my lack of judgement and need to torture myself, decided I would go ahead a build a functioning CNJ steam crane in HO scale. Specifically this one:
I started with the Tichy Train Group 120 ton steam wrecking crane. If you have never assembled one, just a heads up, it's an injected styrene kit that has many, many small parts that have to be removed from the sprue, cleaned up, and glued together.
I have put together one of these kits in the past but it was many years ago. This project was going to involve not just assembling the crane as instructed, but to figure out how to get electrical up through the base and into the cab while still allowing for 360 degree spinning, as well as finding room for some motors, relays, and a decoder.
This was the motor I decided to go with for the cabs rotation.
So I began. My first attempt was to try and use a small electronic slip ring. Feel free to look up what they do and what they look like. All I can tell you is I couldn't find one small enough and the one I did buy to try to frankenstein it into the crane didn't work. So on to trying something else.
I decided I would try and attempt what others had done to make an operating Athearn crane. By creating a contact point on the chassis on the crane and one on the cab where they connect. Easier said than done when the working space is the size of a mostly hollowed out nickel. I tried to cut the piece using metal sheers and a sheet of thin phosphor bronze. It didn't go very well. Then a friend suggested using a punch. Unfortunately he or I didn't have the right sizes so off to the internet store to find what I need. I purchased the 2 punches I needed and made my little metal donut. One of these I cut, the other the punch did.
So now I had to figure out the contact from the other part of the crane. At this point I wasn't sure whether the metal ring would go on the base or the cab.
After some serious thought and some hacking up of some of the kits parts I decided on this. That's the bottom of the cab
Next was figuring out the other contacts from the chassis. From the Athearn crane build by Geoff Bunza I decided I would try using pogo pins. They are small spring loaded contact points. I ordered 4 different ones to try out and decided on these. I should mention that I only need one contact to be installed like this because the motor that I decided on to make the cab and boom spin has a metal reduction gear box that I was able to pass electrical pickup though. I drilled some holes in the chassis and glued the pogo pins into place. This picture only shows one installed but I did another one opposite of if.
As for the pickup through the gearbox, I soldered together some brass tubing for the motor shaft to slide into underneath the crane.
Attempting to model the CNJ, one day at a time.
Pete