Lane built his Bridgeport to 1/3 scale http://www.cp-tel.net/mary/Lmill.htm . The current issue of HSM shows Pierre Scerri's 1/3 scale Ferrari. These are the finest models I have ever seen. But the scale factor seems a bit odd. Quarter, eighth, sixteenth scale -- this seem logical, decreasing dimensions by factors of two. Dividing the original dimensions by 3 is likely to result in scaled dimensions which end in .33333... or whatever.
Is there something venerable about 4"=1 foot?