KInd of doubt it would sail faster without the hydrofoils, as the drag of the foils *should* be considerably less than the viscous drag + wavemaking drag of the hull that's being lifted.
The windward hull wasn't being lifted (primarily) by the sail pressure - the foils are bearing a considerable part of the load. Full foilers like the Windrider Rave and the Hobie Trifoiler can frequently double the wind speed, although they make lousy cargo carriers ;-)
Mike
On Aug 20, 2010, at 12:32 PM, tsstproa wrote:
> Thanks, Thats what I was tring to find out. Maybe it would sail faster If the T foil wasn't there? Just using a vertical board/ boards.
>
> Todd
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> --- In harryproa@yahoogroups.com.au, Michael Gehl <mike@...> wrote:
>>
>> Those aren't boards - they're Moth-style hydrofoils.
>>
>> http://www.boatdesign.net/forums/attachments/multihulls/37961d1259876652-foiler-kings-cup-thailand-arnie-2.jpg
>>
>> Another interesting feature is that the center "cassette" slides along the beams to adjust the hydrofoil centers of lift wrt windward/leeward balance.
>>
>> Lastly, it uses a wand to control angle of heel. Doesn't seem to hit Rave or Trifoiler levels of speed, though.
>>
>> Mike
>>
>>
>> On Aug 20, 2010, at 10:31 AM, tsstproa wrote:
>>
>>> Anyone seen this? Here are some center hung board both being down while sailing hung between two hulls on small center console.
>>>
>>> Nice boat.
>>>
>>> http://www.youtube.com/watch?v=ZggxS6ZrVOw&feature=related
>>>
>>> My solid wing is 2% thickness 9.6% camber. Why go to 20% thickness for a 2.5 inches thick wing. Thin is fast.
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------
>>>
>>> Yahoo!7 Groups Links
>>>
>>>
>>>
>>>
>>
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