Hi Bill, you figured it out nicely but I wonder why was the band wider than 36" (915mm)So here is the proof in the pudding based on the pdf from Catch up there.
So the kit wing is 110mm horiz.
The dwg scales 32mm from the fuselage.
The stripe scales 20mm wide on the dwg.
So to get inches... 20mm wide X 25.4 (conversion mm to Inch) = .787" X 48th scale = 37" actual width
by the dwg..
Close enough to the 3' or 36"
so doing it backwards..... 36"/48th scale=.15" X 25.4 = 19mm@1/48th scale.
Done
View attachment 644680
When printed 1:1 the drawing should give you the exact sizes in 1:48. You are absolutely right that 3' in 1:48 are 19mm, and the band in my drawing is 19mm - I checked it.
The discrepancy probably comes from the length of the kit wing - 110mm as per your explanation. The same length in my drawing when printed 1:1 is less (107-108mm). So if you have printed bigger than 1:1 to match that size, the band became wider. Either the kit wing was made bigger or the drawing I used is not correct.
It doesn't matter actually, you did it so or so.
Have fun! Those colours + engine gray are the ultimate killers!
Cheers!