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Tank Trailer for the Autocar U-7144


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Got the trailer started using a boat building method.  Made up some bulkheads (trailers had them to keep liquid from sloshing around) and then began adding strips of Evergreen to shape the sides.  Rather than try and curve sheet stock which has a tendency to buckle in the middle, the strips stay straight and only need to be sanded down and filled to make the surface smooth.  I filled in the bottom with some 2 part resin to strengthen it and make it easier to sand the outside.  Still plenty of work to do but it's a start.

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Its got skirts now!  Got them done this afternoon.  Still some cleaning up to do on the bottom tank surfaces.  Still to decide if the top where the two filler manholes go should be narrowed up.  It looks to wide and high right now.  Rear bumper to be added along with the typical pintle hook and rings for chains.  More detailing to take place on the tank itself and get the landing gear made up.

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That's moving along pretty fast! Must be raining a lot there, LOL!

Kinda surprising there isn't a full frame under there, the tank itself is stressed like a monocoque design, unusual if you've built any tanker kits before. Very unique, again you've blazed a trail for the rest of us

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Hey, Steve!  Getting the curves right is easier than it might look.  I made templates on my graphics program and stuck them to some sheet plastic with contact cement (one surface only).  Then I trimmed them out.  Doing it that way made the bulkheads all the same.  The double curved one the end was made last and the only thing I did was extend it some horizontally.  I intentionally left the sides of the tank extra long and bent the bulkhead a bit and snapped it in place.  Then it was glued in permanently.  Trimming the sides to the shape of the end was easy after that.  Take a look at the second photo down from the top and you will see what I just described.

Edited by Chariots of Fire
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Here's an update on building progress.  The main tank portion of the build is done and details are now the order of the day.  Bottom plumbing is generally done with some fixtures needed at the end of the discharge pipes.  Hinged brass doors were made for the rear compartment.  Two more small doors need to be made for access to the storage area for the discharge hoses.  The back is now enclosed and will have a small pump and a box of tools.  Need to get the landing gear finished up as well.  One thing at a time!!022.thumb.JPG.964d8c9d2c798215b74a3d64f7bcefda.JPG023.JPG.5fb74b4c635f38b2ef891cfcd517195b.JPG024.JPG.07167b627adcd2248366dfe50ab89b07.JPG025.JPG.59701619cdb0bea804f7d0803d710b98.JPG026.JPG.dada221be760943fda980521bfc9ef26.JPG029.thumb.JPG.c5a2e546190417b333e7deaf3ce01ebe.JPG

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Here's where we are as of tonite.  Most of the real work is now done with only a few details left.  Compare the photo above with what we now have below and you can see there's been some real progress.

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In addition to the actual construction the decals are now done and some weathering has been completed.

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Several details added to the back of the tank including lights, handrails, steps, bumper, pintle hook and a set of small doors at the corners.

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Acrylic black and water was used to create a dirty look to the top.  Weathering powders of black and brown were used on the sides.

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Tail lights are made from plastic tubing.  The face of each was first painted with Molotow chrome, then Tamiya clear red.  Then a decal was put over the top revealing just the lens area in red with the rest OD color.

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After the door decals were set, a new single edge razor blade was used to cut the decal at the folds.  Setting solution was added to seal the cuts.  The small doors open up long tube areas where the suction hoses are stored.

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