Time to add details to the top plate. I was expecting that the details of the AHHQ were authentic and could be glued into place, starting with the engine vents and exhaust. But when the modern photo on the left was my clearest exhaust reference, I was worried. Not to fear, the historic image on the right shows the curved style provided by AHHQ.
When I came to attach the outlet, I then realised that the AHHQ exhaust is not hollow. I have deliberately kept the smoker function, so it needed to be open. I considered reverting to the hollow TD one on the right, but it’s awful. I drilled both ends of the AHHQ one out until they met and made a brass spigot to mount it. I also did some drilling to align the non-aligning apertures of the various layers.
And here it is altogether. Then I looked at Louis’ build and realised I made the mistake with the mesh he warned against – the mesh is supposed to go underneath the pipe flange.
Then I had to scratch build the details surrounding the Aussie air filter box. It took a lot of trawling to find enough details of the box. For all of the photos of Vietnam M113s, very few show these details. It was so hot and steamy in Vietnam, the top hatch was rarely closed when cameras were taking shots. These are the best ones I could find.
This image shows the divider for each half, and the bump-stops and a version of the blower vent.
I began by test-fitting the hatch. I wasn’t confident that the stock plastic hinge would stand up to the load of the extra work I would place on them, so I drilled them out and used brass tubing.
Then I built a filter box from plasticard layers and brass angle.
Next came the internal blower. There are various designs – here is a modern version from around 2000.
I used old pens to donate similar shapes. The latch chain had to be heated and reshaped to match the support it would get from the blower.
Next came the bump-stops, and I had a very ‘forest-for-the-trees’ moment. I’d made a decent set of brackets in brass, lined them up and attached them to the hull, then realised the lower brackets are attached to the rear plate and the top plate at the same time – locking them together. I resorted to a slightly modified shape.
Here is everything with the Aussie version of the bump-stops.
