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Forums28
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Most Online238 Feb 9th, 2024
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Re: Putting Rhapsody's Keel on a diet
[Re: Luke Buxton]
#11463
04/05/11 07:05 AM
04/05/11 07:05 AM
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Joined: May 2007
Posts: 2,668 Portsmouth, RI
Rhapsody #348
OP
Past J/30 Class President
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OP
Past J/30 Class President
Joined: May 2007
Posts: 2,668
Portsmouth, RI
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Luke - according to the specs listed at the bottom of the J/30 Class rules, there is a note that reads tip rounded to a centerline depth of 20mm maximum below Section V. To me that sounds like a curve with a radius just over 0.75". I'm thinking of cutting a section of PVC pipe lengthwise, lining it with release cloth, then filling with thickened epoxy to provide a uniform shape for bonding to the keel bottom.
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Re: Putting Rhapsody's Keel on a diet
[Re: Rhapsody #348]
#11607
05/03/11 04:17 PM
05/03/11 04:17 PM
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Joined: Oct 2008
Posts: 76 Wilton, CT
bemusv2
Senior Member
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Senior Member
Joined: Oct 2008
Posts: 76
Wilton, CT
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Bill,
Lookin good! Though I guess if you were working that you missed your intended launch date of last weekend. If it's going into the water before May 18th then let me know and I'll do my best to come up and sail her down with you.
Wes
Last edited by bemusv2; 05/03/11 04:24 PM.
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Re: Putting Rhapsody's Keel on a diet
[Re: Rhapsody #348]
#11622
05/05/11 12:38 AM
05/05/11 12:38 AM
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Joined: Apr 2007
Posts: 97 Bainbridge Island, WA
JBro
Senior Member
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Senior Member
Joined: Apr 2007
Posts: 97
Bainbridge Island, WA
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Bill-
Nice work! I did this (with help) on another 30 10 yrs ago. That keel was asymetrical - fat on one side mid-chord to the trailing edge and "hollow" on the other aft and very fat forward.
Power planer is indeed the ticket. We used tooling to create template "ridges" with yellow-dyed west filler. Once each was done, we too were able to just drag a bunch of thickened filler across the new template stations (like screeding concrete) and it worked quite well.
It was a long (and physically taxing) project but well worth it. You'll notice a difference (i.e. more consistent on each tack) which always required funky tuning to deal with before. Boat also felt less sticky in the water (but that might have also had to do with burnishing to 1200 too... ;-)
Looks great AND you'll be very happy you did it after you get over the back pain!
Cheers, Jeff
- Jeff J/30 #426 - Watusi
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Re: Putting Rhapsody's Keel on a diet
[Re: JBro]
#11623
05/05/11 12:41 AM
05/05/11 12:41 AM
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Joined: Apr 2007
Posts: 97 Bainbridge Island, WA
JBro
Senior Member
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Senior Member
Joined: Apr 2007
Posts: 97
Bainbridge Island, WA
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BTW - one tip if you haven't considered it is an airboard for longboarding a little more efficiently. They're used in bodyshops. Those can really cut through the harder west filler/epoxy materials and then you can use 410 (if I recall correctly) for last skin and then a standard manual long board.
Follow with barrier coat (we used interprotect if memory serves), bottom paint, burnish, and splash! Boy - that sure makes it sound easier and faster than it actually is, huh?
Cheers, Jeff
Last edited by JBro; 05/05/11 12:44 AM.
- Jeff J/30 #426 - Watusi
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