I had a superb 3x4 hybrid transmission on an old Armstrong 3-speed. A neighbor gave me a wheel with a 14-16-18-20 cogset, and when I started playing around with it, I happily noted that the hub clicked when I twisted the cogs clockwise. The gear ratios worked out superbly, with overlaps at the top and bottom of the middle internal range, which worked out well with the double shifts. With a 40T chainring and 26" wheels, I had 39 to 99 gear-inches. One could always put a double up front, something like 40-28, which would take the bottom ratio down to 27 gear-inches..
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069