Wave in hull sides

[melba toast]

I have an outside my rebuild thread question that may apply to rebuilds in general. When I recored my transom with coosa, I added quite a bit of additional glass and resin - and thus created quite a bit of heat and shrinking ability!

The good news is that the bottom of the hull is thicker and was well supported. Therefore, no "hook."

However my hull sides are rather thin. My cap was also off for the layup. We expected some slight alterations to the hull, but on the proline - my hull sides warped inwards quite a bit back near the transom, near the stern and my transom welds. Not expecting perfection here, but....

1) Our plan is to brace the hull back in shape, especially with 2 x 4s shimmed in from the inside... Then set the boat out in the sun early this summer and add some heat lamps to get the hull, no more than ~ 220 degrees F, then let it cool and hope the glass returns closer to its original shape.

2) I also plan on adding a matte/woven/matte layer to the the hull sides after the floor is tabbed in. And, may brace the hull from  the outside during this layup.

3) Finally, if needed, I could add to the exterior and fair it out, but not looking forward to that much.



Thoughts ?

[GoneFission]

The hull sides on some Aquasports are pretty thin!  Most rebuilders brace the sides to help hold them in shape, and many add more glass on the inside to help with structural stiffness and overall strength.  Look at some of the pictures in the rebuilds section and you will see examples.  Good luck!

[dirtwheelsfl]

Put a straightedge on it and get some pics...

[melba toast]

Will be monday, but will get a pic on each side. Its just back by the transom welds and its a nice little bit of warpage.

[melba toast]

Also notice how the hull sides are warped up near the cap.




Here it is looking down the trim stripe, some of this slight wavyiness is common in most 20' prolines.




port side...

[melba toast]

I think doing some thing like these beam braces before adding any more glass will be the key:

http://i845.photobucket.com/albums/ab19 ... braces.jpg

[seabob4]

I think doing some thing like these beam braces before adding any more glass will be the key:

http://i845.photobucket.com/albums/ab19 ... braces.jpg

Old London (hey, they make the melba toast, right?),

I would seriously consider bracing far down into the hull along the hullsides before glassing any further, and after you have HOPEFULLY gotten that warpage out.  The sun and "stretchers" is a good idea, but you are going to have to control that outward movement somewhat, or else then you're going to be faced with the opposite problem when it comes to re-decking her.

Hull molds, lam schedules, all very nice at a boat plant, controls the shape to a degree.  But we don't have that expensive luxury.  Relax on the lam applications, take your time, don't kick the resin too hot.  Controlled, reasonable cure times given the weather conditions will result in the best finished product.  Probably take more time and effort, but it's a trade off...

[Aswaff400]

i saw a PL 20 that looked to have the same wavy hull sides on craigslist last week...

http://tampa.craigslist.org/pnl/boa/3596022008.html

[dirtwheelsfl]

Not much you can do but push/pull it back to where you want it somehow, and hope it stays like that when the structure inside is restored (and cap put back on). Or you might need to add extra beef to the hullsides to hold that correct shape if the new deck etc didnt keep it. Hopefully its not as bad as that one in the craigslist ad  

[melba toast]

It's not nearly that bad!!!!