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Old Nov 24, 2012, 10:29 AM
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Cool thanks. Yeah so far we've found very few people willing to line up with our boats, that's why we've taken to racing the 420 fleet!
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Old Nov 24, 2012, 12:07 PM
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.Yeah so far we've found very few people willing to line up with our boats...
Really? Some people just don't know how to have a little fun!
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Old Nov 24, 2012, 01:32 PM
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Really? Some people just don't know how to have a little fun!
I have run into that....
To be honest we may not be the faster than some of the big classes in all conditions, I'd just love to line up and see where we are.
My guess from what we've seen is our big strength is upwind in anything over 10 knots.
I hope that people will check the design out & give it a chance. From what I've seen there really isn't much out there that's like it.
The Wheeler being the closest due to size and One Design status.
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Old Nov 26, 2012, 06:58 PM
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CNC machined plugs & female molds.



Hull #4 going out the door to a happy new owner!

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Old Nov 26, 2012, 07:08 PM
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i would perfer to see cottpits for mast ram adjustment and better looks but other than that i am loving these boats! have you put a gps in one to find top / average speed?
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Old Nov 26, 2012, 07:08 PM
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Very nice! I didn't pay much attention to this generation of AC boats- your model, does it follow the typical hull form of the 1:1? Interesting shape.
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Old Nov 26, 2012, 07:14 PM
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Thank you. We looked at doing a deck mold with an "AC style" cockpit. In the end though it would weigh more & not help performance in anyway. In fact it would end up with standing water in it most of the time given the fact that we sail in some pretty rough conditions.
As to mast jam, we have looked at allowing a mast jack for quick rig adjustments (like a real big boat) This will most likely be written into the class rule.
Top speed so far is 9 knots downwind in 25 true.
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Old Nov 26, 2012, 07:16 PM
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Top speed so far is 9 knots
Yep, that's moving along!
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Old Nov 26, 2012, 07:18 PM
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Very nice! I didn't pay much attention to this generation of AC boats- your model, does it follow the typical hull form of the 1:1? Interesting shape.
Yes & no. Beam to length ratio & cross sections are very similar to boats like NZL 92 & ITA 94. We chose to ignore parts of the V5 rule that governed overhangs, so we don't have an extreme bow chin or raised knuckle.
At rest our knuckle is about 18mm above the water.
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Old Nov 26, 2012, 07:21 PM
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Yes & no. Beam to length ratio & cross sections are very similar to boats like NZL 92 & ITA 94. We chose to ignore parts of the V5 rule that governed overhangs, so we don't have an extreme bow chin or raised knuckle.
At rest our knuckle is about 18mm above the water.
avoiding the "Davidson bow" and the like?

your design does look nice, that is for sure!
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Old Nov 26, 2012, 07:28 PM
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avoiding the "Davidson bow" and the like?

your design does look nice, that is for sure!
Thank you. Yes, avoiding the double Knuckle. But it's important to look at the bows in another way: in the end what was going on there was pushing more volume into the forward sections while still getting the boat to measure.
If you look at SUI 100 it has almost no double knuckle BUT has a TON of volume in the bow. I used exactly this concept in my design.
Look here:
http://www.cupinfo.com/en/ac32_acc_comparisons_1.php
NZL 84 & 92 had moderate chins, Sui 91 & 100 not so much but both had tons of volume up front.
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Old Nov 26, 2012, 07:34 PM
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Measurement rules are fun stuff- I find the results facinating... I spent some time over the weekend looking over the hull of an old 1/4 tonner - "Magic Bus". Talk about getting a boat to measure!
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Old Nov 26, 2012, 07:55 PM
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Ah yes, Paul Whiting! Cool little boat!
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Old Nov 26, 2012, 08:00 PM
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that an impressive speed!
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Old Nov 26, 2012, 08:48 PM
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Thank you. We looked at doing a deck mold with an "AC style" cockpit. In the end though it would weigh more & not help performance in anyway. In fact it would end up with standing water in it most of the time given the fact that we sail in some pretty rough conditions.
As to mast jam, we have looked at allowing a mast jack for quick rig adjustments (like a real big boat) This will most likely be written into the class rule.
Top speed so far is 9 knots downwind in 25 true.



You know,
That brings up a fun idea.

Which Class is the fastest, using it's hull speed as handicap? I.E. which design is the most efficient at overcoming Hull speed.
Heavy boats with hulls designed for planing generally cannot exceed hull speed without planing. Light, narrow boats with hulls not designed for planing can easily exceed hull speed without planing.


Given that your design is 79" Long, and using the formula of Vhull= 1.34 x (Square root of LWL in feet) the hull speed of your design is (Rounding off) 3.5knots.


If you hit 9 knots, the boat is at (rounding off) 2.5x hull speed.
I wonder what my Ms can do. The other boat I have, An EC-12 probably isn't going to win this contest.


Someone please check my math
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