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12-12-2007, 07:41 AM
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#1
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Registered User
Country: Germany
Join Date: Feb 2007
Posts: 320
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Cougar V60
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12-12-2007, 09:53 AM
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#2
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Registered User
Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway
Join Date: Sep 2005
Location: West Coast of Norway
Posts: 888
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Nice styling, the steppes looks very shallow though?
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12-12-2007, 03:44 PM
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#3
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Large member
Country: England
Location: On the farm
Occupation: General Trouble Causer Salterns Boatyard
Interests: Official smartass
Boat name: Seahorse.org
Boat make: a V24 and a SLOW unstable ICE Bladerunner
Engines: 2x300 promax, 320 Volvo
Cruising area: England/France & Med
Join Date: May 2005
Location: On the farm
Posts: 2,681
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Very Very shallow, almost to the pont of useless.
It is like someone wanted stepps in the hull design but does not know what the steps are there for.
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12-12-2007, 04:09 PM
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#4
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Registered User
Join Date: Mar 2004
Posts: 6,891
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It's a 60' boat. Of course the steps will look proportionally small.
A bigger boat doesn't necessarily mean bigger steps are needed - depends on the weight, wetted surface area & speed.
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12-12-2007, 04:44 PM
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#5
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Registered User
Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway
Join Date: Sep 2005
Location: West Coast of Norway
Posts: 888
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Normally these things scale with Froude number.
The problem here is not that the steps are small but that have zero height. Steps with no height will not have positive influence on performance.
I think this is more an aesthetics study than a repressive drawing of the hull?
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12-12-2007, 04:47 PM
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#6
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Registered User
Join Date: Mar 2004
Posts: 6,891
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The drawing does say it's a GA.
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12-12-2007, 04:53 PM
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#7
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Registered User
Location: West Coast of Norway
Occupation: naval architect
Interests: surface piercing props, stepped hulls, air entrapment hulls
Boat name: none
Boat make: PetterTintorera
Engines: Yamaha 90
Cruising area: West Coast of Norway
Join Date: Sep 2005
Location: West Coast of Norway
Posts: 888
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good point...
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12-12-2007, 05:08 PM
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#8
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Registered User
Country: uk
Location: Bristol area
Occupation: Electrician
Interests: mmm stella
Boat make: 16 reiver
Engines: mercury 125 optimax
Cruising area: Lyme Bay
Join Date: Mar 2006
Location: Bristol area
Posts: 344
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the drawing also says "nts" (not to scale)
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12-12-2007, 07:44 PM
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#9
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Registered User
Occupation: Champion Pie Eater
Boat name: On The Rocks
Boat make: Ring 21 marshan 17 four winns horizon, hydro 3 pointer, f2 cat, backdraft 22
Cruising area: Way up norf and Sarf coast areas
Join Date: Apr 2007
Posts: 1,619
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Adam was drawing for Cougar for a while maybe he could shed some light on this one?
gaZ
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13-12-2007, 10:11 AM
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#10
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Registered User
Join Date: Nov 2007
Posts: 68
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Quote:
Originally Posted by gazza
Adam was drawing for Cougar for a while maybe he could shed some light on this one?
gaZ
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He's already been blamed for the Thunderboats, give the guy a break.
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13-12-2007, 07:32 PM
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#11
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Registered User
Occupation: Champion Pie Eater
Boat name: On The Rocks
Boat make: Ring 21 marshan 17 four winns horizon, hydro 3 pointer, f2 cat, backdraft 22
Cruising area: Way up norf and Sarf coast areas
Join Date: Apr 2007
Posts: 1,619
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