Shubova,
Take the wingspan of real aircraft, in this case 32'2" (386") and divide this by the wingspan of model, 72" and you get 5.36 or 1/5.36th scale.
It doesn't mean the wing cord or fuselage length will come out the same, that all depends on the model designner. This gives you an approx.
idea of scale size.
Hope this helps!
Rcten
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