Years ago as a teenager I had to move more than a hundred 1/72 scale model airplanes. My simple solution was to find several corrugated cardboard boxes of various sizes and cut up some to act as insert dividers, making sure they fit tightly edge to edge inside the carrier box. I would then cut out the shape (airfoil) of one wing in one divider with a hobby knife and make a mirror image cut in the other divider.
Placing the wingtips in the dividers not only kept the dividers from moving, it also kept the wings from moving and the airplanes from contacting anything else. I was able to get maybe 15-20 airplanes (mostly World War II fighters) into each box by just cutting out as many airfoil slots in the dividers as they (or me) could handle without any part of any airplane touching another.
For further sturdiness, I would cut smaller cross pieces and interlock them as needed on the dividers. It helped to have airplanes of similar size grouped so the dividers were parallel. Once all the wings were inserted in both halves of the dividers, the whole formation of airplanes was placed inside the carrier box and sealed with tape. Several hundred miles in a moving truck caused practically no damage. Cost? Nothing.
Tip submitted by:
Richard Farrell
Robbinsville, N.J.