Advice on cramming a Hornresp figure into a box?

[Oraclem19]

looking for information trying to turn some of these Hornresp schematics into real box schematics. Have not had much luck, would appreciate any help in doing this. Want to be able to try some of these horn types without making 7 foot long boxes. Any help would be appreciated,.as much as I would love to just do a single fold and calculate angles and just math it out and all that.

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[hispls 5,000+ posts]

I'd think to get some good graph paper and a protractor and try drawing it to scale. Should be rather simple to divide the length by a whole number and that's how many folds you need. From there you can figure out the width at any given point along the length to square up your sides, then just measure the angles.. Really you can simply extend the lines across in your fold to the vertex of the angle and figure it out with the lengths of the sides either. Just might be easier to play with drawn out to scale.