Hi Paulo - I don't know if you've seen the Yachting Monthly interview on YouTube with Robert Taylor, the owner of the modified Corribee 21 "Mingming 2"? This is a junk-rigged "adventure" yacht, designed specifically for extended (67-70 days) in the high northern latitudes - e.g., Greenland, Spitzbergen, etc. Ordinarily it is not what one might consider a "performance" boat, but Taylor explains how the modifications he made to the boat in fact improved its average speed by 1-1.25 knots, enabling him to extend his cruising range by as much as 1,000 - 1,500 miles, on any given voyage. It is a very clever design, and demonstrates that you can have an affordable "adventure" yacht if you are willing to make some compromises in personal comfort.
This is the interview you mention (movie):
It belongs to a series YachtingMonthly has on older designs. That is a pretty conservative magazine and I am a bit ashamed to say that I had subscribed it or bought it for 20 years or so LOL. I had an old traditional boat so It went well with the magazine :-). Regarding the Corribee 21 or that rig, it was an interesting boat for its time but way outdated today. Nobody seems to give a damn about it except Robert Tailor and YachtingMonthly.
Look at this bid on internet regarding what seems to be a pretty well cared example of that boat: They asked 2500 pounds including what looks a pretty new trailer and got 0 bids: http://www.ebay.co.uk/itm/21-ft-sailing-yacht-Corribee-Junk-rig-with-road-trailer-/171031276917
Regarding putting a much bigger rig to that boat I hope that it will not end in disaster. There was a good reason for that rig to be of that size. A rig is designed proportionally to the boat overall stability and the one on that boat is not big.
As for Roger Taylor's Corribee, indeed, this is an ancient design, although the same design that Ellen MacArthur singlehanded around Britain, when she was a teenager. I was more interested in what Taylor did the junk rig, which of course is not one you see very often but shares some similarities with the wing sail rigs we've been seeing lately, with respect to the cambered panels, which facilitate easy reefing.
Regarding the Corribee and the rig junk sail there are two basic differences: It is not a wing sail and it only works well on one side of the mast. When you tack to the "wrong side" or you lose the shape of the sail or you have to pass it to the other side of the mast. Not easy on a boat with a big sail and not fast in any circumstance. On a wing sail you don't have that problem because the mast is inside the sail, not on one of the sides.