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Post by vasko on Nov 6, 2017 20:23:16 GMT
Sorry for the stupid question but what is the difference between flush and mushroom thruhull ?
For stainer type is clear...
Also what is wrong with titanium thruhull ? Seem price is good and best possible material ?
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Post by Caxton on Nov 6, 2017 20:45:23 GMT
Flush mount means the thruhull is flush with the outside of the hull, the hole is tapered to match the taper of the thruhull fixture, think "counter sunk." Mushroom thruhull overlaps the hull on the outside of the hull like a mushroom and in not flush with the hull. I think plastic or Marelon are the way to go. No worrying about corrosion anymore. www.forespar.com/marelon-marine-boat-plumbing.shtml or Trudesign www.trudesignmarine.com/Caxton |
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Post by hoppy on Nov 6, 2017 23:04:23 GMT
Flush are for racers and anyone who are looking for the extra 0.001 knot of speed. Probably a little more hassle to fit.
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Post by vasko on Nov 7, 2017 11:07:31 GMT
Flush are for racers and anyone who are looking for the extra 0.001 knot of speed. Probably a little more hassle to fit. That explains it then  I need only muchroom type |
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Post by hoppy on Nov 7, 2017 12:28:30 GMT
I fitted mushroom and now that I race, do I regret it? NO!!! Jessabbe needs more than flush thruhulls to speed up.
If I was committed to a spending program to fine tune Jessabbe to make her more competitive, i.e. new race sails, extreme diet (remove radar, reduce house bank), fine tune keel profile or add wings, then I'd be regretting the mushrooms.
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Post by so36idavid on Nov 8, 2017 6:42:28 GMT
FWIW we hit something 50 miles offshore and 500 miles from the nearest haulout. I don't know what it was, we didn't even feel the impact, sea state was boisterous. The impact cracked the thru-hull on my speed transducer (plastic) and we started taking on water (slowly). It also took a little chunk out of the fairing at the top of my keel. No structural damage but it took a haulout to get it all ironed out. So plastic thru-hulls mean no worrying about corrosion any more but something else to worry about. If you're wondering what I did about the leak. I built a little sarcophagus of epoxy putty and sealed the thru-hull in place. Luckily we got the epoxy to adhere and it stopped the inflow. If the damage had been greater and there was significant water pressure behind the leak it could have been a lot more interesting. Every boat should carry a stick of epoxy putty, if you don't have one go down to the hardware store and get one. David |
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Post by sailbleu on Nov 8, 2017 7:22:25 GMT
Every boat needs a sheet ( around or less than 1mm thick ) of aluminum plate (and a tool to cut it to the proper size) and a fresh tube of sicaflex , tec-7 or silicone.
Sealing a leak from the outside is always better , the listed products will cure underwater.
Regards
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I need only muchroom type 