Here is my way of preparing wing planks for 72nd scale in the kitchen:
A piece of 1.5 mm styrene is bent into a special cooking pot for
wings asparagus, about 20 cm high and 16 cm diameter.
The plastic has to be longer than the diameter x 3.14. Press it in and mark two pencil lines.
Cut it longer than the marks and try again. It has to be a very tight fit. I made two cuts and it is till longer than the marks.
Now fill the pot with water and put it on the stove. To save time and energy use a lid. Mine is from larger pot so it does not touch the styrene.
Temperature is crucial, so use a cooking thermometer frequently.
It is better to start with less heat, no problem to repeat if the curve is not tight enough. Too much heat may damage your styrene beyond use.
My stuff was good at 87° C, but next sheet might be different. I let it cool down naturely.
Now cut off strips of the required chord with some margin, this should give you raw planks for some 20 models.
1 mm material or thinner does not work this way, but it works if two layers are used, the thicker being the inner one.
With these planks very little sanding of undersides is required.
For a flatter profile just place the trailing edge a little higher.
Hope some may find this useful
Joachim
