Well, you could do a little pleasant Internet research and discover the length of the real S-2, then, using a ruler (1/4 inch on the model = 1 foot on reality; 1:48, y'know) determine exactly how long the model is per reality.
(Hint: the real S-2 was 41'6" from pilot to pilot - I looked it up - and disregard the oversized couplers on the model...so that would be 41.5 "quarter-inches"...)