Dunno if American or British subs ever used it, but German U-boats in both wars were issued sails and articulated masts for emergency use. I only recall reading one story about actual usage, can't remember which book.
Another item - in the sub type SIM file (Silent 3ditor again) the range submerged is all screwed up and not worth tinkering with. But the surfaced range and the speed to obtain that range is straightforward and works like you'd expect. So if you want to increase max range and/or change the max range cruising speed from 10 to 12 or even 15 knots, that works fine. I increased all of mine to 15 knots for max range because I get enough tedium in real life without having to put up with it in computer games.
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