low
A piece of .010” styrene forms the base for the tarped load. It is cut as long as the con- tainer and as wide plus an extra eighth of an inch along each side. Pencil guide lines mark where the styrene sheet is folded to create shallow “flanges” at the edges. These will overlap the sides of the contain- er slightly. The photos show the layout process and how a straightedge is used to fold this cap. Do break it at the creases.
flanges, fold and tuck the bag around it and secure the bag. Do the other side, then fold the ends in and glue them to the underside of the cap. Trim off the excess and the tarp itself is done. With the cap done and the tie-down rails installed on the container, the fi- nal detail is adding the tie-down straps. This will be done prior to gluing the cap in place. Prototype tie-downs are generally bungee cords hooked onto the edges of the tarp, and they may be simulated by adding a criss- cross of black thread or EZ Line (which stretches nicely to remain tight) be- tween the tie-down rails and across the top of the container.
Drill a hole in the roof of the contain-
ern materials are extremely thin, I rec- ommend that you paint the entire cap the color of the bag prior to attaching it to the cap. This prevents the load from showing through.
Cut a section of bag one inch longer than the cap’s length and twice its width. Apply cyanoacrylate cement to the middle of the foam and glue the plastic bag to that part of the cap. Al-
RAILROAD MODEL CRAFTSMAN
equal overhangs on the ends and sides. When the glue has set, apply cement to one of the flanges and secure the bag to it, tightening it up a little in the process. When that side is done, do the other one. (At this point the bag has not yet been attached to the inside faces of the flanges.
Once all of this has dried, apply ce- ment to the interior side of one of the
er at each end along the first roof rib, then cut a 24″ length of thread or line and insert it into one of the holes. Se- cure it on the inside with tape or a dot of glue. Begin weaving the string back and forth, going through alternate tie- downs and back across the roof to the other side in a zig-zag fashion. To help keep the desired alignment while you are working, small pieces of tape can be applied to the rooftop to hold every- thing in place until the thread is ready to be cemented to the roof.
When the opposite end of the con- tainer has been reached, run the thread through the second hole into the body, where it may be secured using tape. To reinforce the tie-down line and keep it from shifting once the model is complet- ed, apply cement on the inside of the
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