Keel pin/trunk hull cracks
Posted: Wed Sep 04, 2013 9:54 am
Hi Group,
I wanted to see if this repair was done by somebody else here, and see how they proceeded if different than me...
Picked up a C-22 as a daysailer and found some problems ... Primarily on my list is hull cracking discovered around the keel pin mounts... The keel cable was snapped when I got her, but there obviously had been some problems before...
These cracks are pretty significant in number, but upon grinding to the glass on the outside, can't find much if any cracking, So mostly stress cracking inside.... I think I have a handle on the repair...
1. Cut out a plywood section of the trunk which is not terribly dry rotted, but softer than I liked...
2. grind/groove cracks...
3. lay glass cloth in wood cutout, 2 layers 6 oz extending 2" above, 2" past side bulkheads fore and aft, and 2" beyond bottom cracks. 4 more layers 6 oz in cutout transition to bottom extending 2" past cracks
4. prepped new panel insert = 1/4" solid oak+2 layers mat, 2 layers 6 oz each side, cured under pressure
5. Adhere panel insert with 1/8" epoxy/406 layer, cure under pressure
6. fill panel gap (1/8") with epoxy/406, cover with 3/4 marine ply, cure under pressure.
7. glass and fair 3/4 ply cover in place with tabbed support strips
The only bummer I see right now is that I intend to repeat the procedure on the starboard side... Which means cutting an access panel in the interior pan and keel trunk cover...
Pics to come...
Any thoughts?
Thanks!
HS
I wanted to see if this repair was done by somebody else here, and see how they proceeded if different than me...
Picked up a C-22 as a daysailer and found some problems ... Primarily on my list is hull cracking discovered around the keel pin mounts... The keel cable was snapped when I got her, but there obviously had been some problems before...
These cracks are pretty significant in number, but upon grinding to the glass on the outside, can't find much if any cracking, So mostly stress cracking inside.... I think I have a handle on the repair...
1. Cut out a plywood section of the trunk which is not terribly dry rotted, but softer than I liked...
2. grind/groove cracks...
3. lay glass cloth in wood cutout, 2 layers 6 oz extending 2" above, 2" past side bulkheads fore and aft, and 2" beyond bottom cracks. 4 more layers 6 oz in cutout transition to bottom extending 2" past cracks
4. prepped new panel insert = 1/4" solid oak+2 layers mat, 2 layers 6 oz each side, cured under pressure
5. Adhere panel insert with 1/8" epoxy/406 layer, cure under pressure
6. fill panel gap (1/8") with epoxy/406, cover with 3/4 marine ply, cure under pressure.
7. glass and fair 3/4 ply cover in place with tabbed support strips
The only bummer I see right now is that I intend to repeat the procedure on the starboard side... Which means cutting an access panel in the interior pan and keel trunk cover...
Pics to come...
Any thoughts?
Thanks!
HS