Sportboats: Design for Flight

There are some really exciting sportboats available now and at the end of this post are some interesting websites particularly the one with comparison statistics of a few current boats. For purposes of this post I'll define sportboats as relatively high powered keelboats between about 20' and 30'. Some boats are much higher powered than others as you'll see in the comparison table.
After doing an exploration of the feasibility of a foiling 60' monohull keelboat
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60' Moth-A Preliminary Detailed Design Exploration - Boat Design Forums
Address:http://www.boatdesign.net/forums/showthread.php?t=13654
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, it occurred to me that the next big advance in monohull foiling would probably be with a boat that fits the definition of sportboat so I 'm presenting very preliminary numbers for a two person and three person "Sportboat Foiler":
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Two Person
---LOA 24'
---LWL 24'
---Beam 18.6' (overall, incl. racks)
2.4' at waterline
---Draft 6.5' keel,foils retractable
---Sail Area 586sq.ft. upwind and downwind
---Boat weight,incl. rig and ballast-1100lb.
---Ballast 490lb. (100° canting keel)
---Displacement (incl crew)-1420lb.
crew-320lb.
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Three Person:
---LOA 24'
---LWL 24'
---Beam 10.73' (overall incl. racks)
2.4' at waterline
---Draft 6.5' keel and foils retractable
---Sail Area-600 sq.ft. upwind and downwind
--- Boat weight- including rig and ballast-1100lb --- Ballast 490lb.( 100° canting keel)
---Displacement, incl. crew 1580
crew-480lb.
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Other comparisons:
---Sail Loading(weight divided by SA)- Two
Person=2.42 lb. sq. ft. ; Three Person= 2.69 lb. sq.ft.
---Mainfoil Area- Two Person=7.1 sq.ft. ; Three
Person= 7.48 sq.ft.
---Mainfoil Loading- Two Person=158lb. per sq.ft.
Three Person=169 lb. per sq.ft.
---Sail area per sq.ft. mainfoil area- Two Person =82.5 ; Three Person=80.2
Note: Two person foil stats are approximately equal to a Moth with Rohan Veal aboard; Three Person stats approx. equal to a Moth with a 160lb. person aboard.
---D/L Two=45.6 Three= 51
---SA/D Two= 74.3 Three=70.9
---SCP/total weight Two=42% Three=38.4%
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Both boats would be designed to be rightable by moving the keel; The keel would probably use a system similar to the one described here in the first post:
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90°-110° Canting Keel - Boat Design Forums
Address:http://www.boatdesign.net/forums/showthread.php?p=112898
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Weights for the hull and rig were derived from EXISTING boats that have hulls ,for the most part, twice as wide with over double the area anticipated with these boats. The hull would be very narrow -not much over three feet wide(at the deck) with possible flare out forward for a minimal cuddy cabin. The hull would be double-ended. In comparisons with the other boats in the table below the Sail area to wetted surface ratio of both versions above is probably greater than any other boat even INCLUDING the wetted area of the hydrofoils.(8.27/1 vs. 4.7/1 for the Martin 243).
I did this to show how incredibly close we are to having one of these boats actually built; the technology required to do this is available now and I hope it won't be long before "Flying Keelboat" really means flying...
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Sportboat Comparisons:
Sport Boat Comparison Table( scroll down)
Address:http://www.open570usa.com/info/sport_boat_comparison_table.html Changed:12:10 AM on Tuesday, November 7, 2006
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26 Sierra
Jim Betts
Address:http://www.sailinganarchy.com/innerview/betts.htm Changed:10:28 PM on Sunday, February 8, 2004
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Open 5.7 "Home of the flying 20' keelboat"
Info | North American Class Association | Open 5.70
Address:http://www.open570usa.com/info/ Changed:12:10 AM on Tuesday, November 7, 200