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#1
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Rebedding keel & backing up bolts
This is a continuation of a previous thread. I have a couple more
questions. After I drop the keel I plan on grinding out any cracks and or delamination. Then laying down more glass and epoxy. I have some Kevlar matte. I would like to know if this would be good to use under the keel bolt nuts? Or should I just stick with regular Glass? Also, would it be a good idea to use larger backing plates under the keel bolts? Instead of just the 2" fender washers. Maybe a S.S. plate that would span two or more bolts. There are (10) 3/4" S.S. bolts with 1 1/8" nuts. I will lay the glass down let it set. Drill the holes again. bring the keel back to the hull. Tape the threads of the keel bolts.Then place some thickened epoxy in the area of the plate. Wax the plate really well. Place it over the bolts and draw it up slightly. Then let it set up. Then torque to spec. This should give it a good even, flat area to carry the load. Finally. Any opinions on glassing over the hull to keel seam? Maybe using the same Kevlar matte. Extending the matte vertically 6-8" beyond the seam. Thanks again, |
#2
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Kevlar is good for point impact resistance but unidirectional glass is
better for strength. A backing plate is an excellent idea. I am using a 1/4" stainless plate. One forward and the other aft of the broaching frame. I would not glass over the joint. You are going to get a little movement no matter what you do and the glass is going to crack. After you get the mating serface cured, drop the keel just a fraction and fill with something like 4200. Draw it back up almost tight and clean off the squeeze out. Then torque to final tension after the sealant has had a chance to cure. -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com wrote in message ... This is a continuation of a previous thread. I have a couple more questions. After I drop the keel I plan on grinding out any cracks and or delamination. Then laying down more glass and epoxy. I have some Kevlar matte. I would like to know if this would be good to use under the keel bolt nuts? Or should I just stick with regular Glass? Also, would it be a good idea to use larger backing plates under the keel bolts? Instead of just the 2" fender washers. Maybe a S.S. plate that would span two or more bolts. There are (10) 3/4" S.S. bolts with 1 1/8" nuts. I will lay the glass down let it set. Drill the holes again. bring the keel back to the hull. Tape the threads of the keel bolts.Then place some thickened epoxy in the area of the plate. Wax the plate really well. Place it over the bolts and draw it up slightly. Then let it set up. Then torque to spec. This should give it a good even, flat area to carry the load. Finally. Any opinions on glassing over the hull to keel seam? Maybe using the same Kevlar matte. Extending the matte vertically 6-8" beyond the seam. Thanks again, |
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