M3A1 HALFTRACK - 1/16 - from Andy's Hobby HR

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GCB

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Aug 22, 2023
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Starting the M3 halftrack and my eyes are resting after the 1/350 scale.
Nice kit, plenty parts and easy instructions.
I built the chassis and it will go for painting soon, and also the engine. Lots of details on the engine and fun to assemble, however, as Edbert said, seams everywhere.
So, I will take it easy on the engine, as it is not going to be seen, and will not fight all seams. Would take days.
Will post more when moving ahead.

IMG_0805.jpg
 
Pretty cool kit. Even has the engine part and serial #'s on the side of the block. Bummer about the seam lines but hey......that's modeling.
6LnXAP.gif
 
Pretty cool kit. Even has the engine part and serial #'s on the side of the block. Bummer about the seam lines but hey......that's modeling. View attachment 168411
Yes, pretty nice engine! One thing missing is the distributor cap (which was existing on the Jeep from Takom I built - see below). I could have made one, but as I said, the engine will not be visible, so not going further on the engine.

IMG_9406.jpg
 
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I would just have put the whole engine, except maybe the underside, into my spares box :)
Thought about it, but then, would be some gaps when looking for below (which never happens, but..)
 
Bummer about the seam lines
I think those "lines" on the frame as he showed are supposed to be there. I figured that out after spending time sanding mine away. Not too worried about it, it will be hidden soon enough :-)
 
Engine deserves to be built by himself and exposed as such..
I've seen some videos by people further along in the build than I. There's no hinge mechanism that allows you to make the hood functionally open. But you can make it a lift-off type of thing. Right now I think that is what I'll do.
 
I've seen some videos by people further along in the build than I. There's no hinge mechanism that allows you to make the hood functionally open. But you can make it a lift-off type of thing. Right now I think that is what I'll do.
Yes have seen those too, but still prefer the hood closed.... So, engine is not going to be visible. If not, would have painted it better and added cables.
 
I don't know for sure, but based on the very similar design of bogies used in the M3 and M4 medium tanks, these are almost certainly steel plates.

The way the suspension works is that there are two vertical springs inside the body of the suspension unit. The suspension arms get pushed up when the wheels hit a bump, and thereby push against the levers that are above them. The springs sit on top of those levers, so they get compressed by the levers when the wheels press the suspension arms up :) I mention all of this to explain why those parts you circled, are metal: they slide past each other to allow the arms to push the levers.
 
Now I'm at my computer instead of on my iPad, I can more easily post some (somewhat poor quality) photos from TM 9-710 Basic Half-Track Vehicles (White, Autocar, and Diamond T) of 23 february 1944.

Halftrack suspension.jpeg

Halftrack bogies.jpeg


Interestingly, what I called the "levers" (the Sherman term for them) in my previous post is officially the "crab".

Here's a view of the bogie frame bracket (not "body") with the arms, frames and wheels removed:

Halftrack bogie frame with springs.jpeg
 
The real tracks are steel cables with steel pieces connecting them at every "link", and a metal guide down the middle, and then everything encased in rubber. The bits protruding from the sides are the steel connecting pieces, from which the rubber would wear off fairly quickly. The same goes for the guide in the middle of the track.

In use, the guide would probably wear off its rubber fastest, and would end up polished because it rubs against the wheels all the time.
 

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