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Hull Construction Details #2230
09/29/08 06:53 PM
09/29/08 06:53 PM
Joined: Nov 2006
Posts: 45
Detroit, MI
RobC222 Offline OP
Senior Member
RobC222  Offline OP
Senior Member
Joined: Nov 2006
Posts: 45
Detroit, MI
Can anyone advise on the construction details in the area of the prop strut? I have what appear to be some small stress cracks around what looks like a 4" X 7" mounting plate/base of the prop strut, and another 3" crack on the centerline about 4" behind the strut.

Is there in fact a rectangular plate attached to the strut embedded in the glass? Is there any coring in this area, or is it solid glass? Has anyone else see these small cracks? Assume they are only in the gelcoat, but I am wondering if I should grind into them to see if they go into the laminate.

Any advise is appreciated.

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Re: Hull Construction Details #2231
09/29/08 07:56 PM
09/29/08 07:56 PM
Joined: Oct 2007
Posts: 179
Apponaug Rhode Island
S
sonskyn Offline
Senior Member
sonskyn  Offline
Senior Member
S
Joined: Oct 2007
Posts: 179
Apponaug Rhode Island
The strut has a retangular plate that is thru bolted in a recess in the hull and covered with fairing compound that can safely be grinded away to expose the plate. I did just that at the beginning of the season, tightened the mounting bolts and reglassed the plate with epoxy and matt. Finished task before fairing can be seen at http://bp3.blogger.com/_lkgJ09tvrwg/SAPMI8WjLqI/AAAAAAAAAIc/QnvcNe5OE7k/s1600-h/IMG_0150.jpg

Re: Hull Construction Details #2232
09/29/08 09:24 PM
09/29/08 09:24 PM
Joined: May 2007
Posts: 2,586
Portsmouth, RI
Rhapsody #348 Offline
Past J/30 Class President
Rhapsody #348  Offline
Past J/30 Class President
Joined: May 2007
Posts: 2,586
Portsmouth, RI
Below is an excerpt from a previous post I made a while back. Do you have a 1" shaft? It may have been changed, thus the line around the strut mounting plate.


I met the original owner this summer and he indicated the boat (Hull #348 originally named Tontine in 1981) was built with a 3/4" shaft, but he had heard of other owners complaining of "shaft whip" vibration, so he convinced Everett Pearson to change the shaft. He said that the day before he took delivery that TPI cut out the old strut, and glassed in a new one. This explains why I have a 9" square seam line above the strut inside.

I ground down the crack at the seem and found they were cosmetic. I layed up some resin and glass cloth to cover the crack just in case.

[This message has been edited by Rhapsody #348 (edited 09-29-2008).]

Re: Hull Construction Details #2233
09/30/08 08:52 AM
09/30/08 08:52 AM
Joined: Mar 2007
Posts: 88
Henderson Harbor N.Y.
HHSA Offline
Senior Member
HHSA  Offline
Senior Member
Joined: Mar 2007
Posts: 88
Henderson Harbor N.Y.
I had the same cracks around my strut this year too. I ground them out an used West Systems and 406 filler to fill them back in and fair them out. It worked great and when I hauled her out this fall there was no cracking visible around the strut.

Velocity Girl
#278
HHSA

Re: Hull Construction Details #2234
09/30/08 12:45 PM
09/30/08 12:45 PM
Joined: Nov 2006
Posts: 45
Detroit, MI
RobC222 Offline OP
Senior Member
RobC222  Offline OP
Senior Member
Joined: Nov 2006
Posts: 45
Detroit, MI
Thanks for the info, and especially the photo. Takes away my trepidation about grinding into the material near the strut!

Re: Hull Construction Details #2235
10/01/08 07:15 PM
10/01/08 07:15 PM
Joined: Apr 2007
Posts: 156
kailua, hawaii usa
mango madness Offline
Senior Member
mango madness  Offline
Senior Member
Joined: Apr 2007
Posts: 156
kailua, hawaii usa
Mines all cracked. Fix it when I pull it.

I'm still pissed at the doghouse cracks near the chainplate though. I'm surprised no one can relate.


mangomadnessj30.blogspot.com

Former Owner, Mango Madness
Re: Hull Construction Details #2236
10/02/08 10:00 AM
10/02/08 10:00 AM
Joined: Apr 2007
Posts: 61
Anchorage, AK, USA
SCampbell Offline
Senior Member
SCampbell  Offline
Senior Member
Joined: Apr 2007
Posts: 61
Anchorage, AK, USA
I have a couple of photos of the strut removed and the hull mating surface. My sister ship in the harbor underwent this repair a couple of summers ago.


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