The South African Railway (SAR) GMAM Class Beyer-Garratt loco

This model has an interesting history. My friend has been visiting an antique furniture shop in Geneva, where he discovered this unmounted DJH kit on a shelf. It was relatively cheap, he could not withstand. He realized soon that he would never build the model, thus he offered me for the same price as he purchased before. I also did not want to build a Garratt, it does not really fit to my collection of Hungarian models, but I could not withstand either. After two or three years on my shelf I decided to build this interesting model.


GMAM Class Beyer Garratt loco model building minipic The main castings. The frame is already glued together from three parts, the boiler also from two parts and the cab too. I used slow setting epoxy to mount the white metal castings as I do not want to enter into the risky task of soldering the low melting point white metal.
GMAM Class Beyer Garratt loco model building minipic The main parts together. In the original plans the cab is also fixed to the frame, but I glued a brass crossbar inside the cab with a threaded hole. This way the cab can be screwed on place after painting and can also be removed if necessary.
GMAM Class Beyer Garratt loco model building minipic The etched framesides. It is astonishing that the manufacturer makes 0.9mm (0.036") thick brass framesides with etching technology.

Unfortunately the motor and gear construction in my model was different than it was originally planned for this kit, and thus I had to cut out a triangle from the frame carrying the motor.


GMAM Class Beyer Garratt model building minipic I did not find any reference in the description about the GMAM yokes. Nor the model drawings showed this part. I can hardly imagine a steam engine without yoke - the crosshead guides should be kept by some more rigid component. Pictures also showed that the Class GMAM locos do have a yoke, just it is rather flat and hard to see. Thus I made yokes from brass sheets.
GMAM Class Beyer Garratt loco model building minipic You can observe on Ttis picture the framesides and the mounted motor frame. It clearly shows as well, why the second frame needed a cutout for the motor.
GMAM Class Beyer Garratt loco model building minipic This is the motor of my kit. The description speaks about a gearbox, but it was not in the kit's box. Even this simple motor mount had incorrect sizes. I had to cut off the axle beam and solder it to the correct place.
GMAM Class Beyer Garratt loco model building minipic These are the cast parts of both tenders. Both are glued together from three basic castings.
GMAM Class Beyer Garratt loco model building minipic This is the valvegear. It contains fine, detailled etched parts. It was even riveted in the box, thus the modeler does not need to do the nasty valvegear riveting job. At least theoretically. Because in my kit two of the riveted valvegear sets contained broken rivets. Not really for beginners!
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This page was last time changed on 30th march 2003.
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