Homemade Outriggers for 15 1/2 ft canoe
Posted by: old_user on Aug-16-13 12:16 AM (EST)
hello! new here. a friend of mine just gave me and my boys a 15 1/2ft canoe to use on our 3 acre neighborhood pond. while im not entirely new to boating, we have never had a canoe before. this canoe will be used to troll around our pond for fishing... maybe a few "pleasure cruises" too from time to time.
i dont have a lot of $$ to spend on this canoe, ive already bought a 45 lb trolling motor and battery, oars, PFDs for all of us, etc.
i am building a set of outriggers for this canoe. im using very strong 1 1/2 inch aluminum angle stock for the supports which are 5 ft in length total. it is fastened to brackets bolted to the gunwales that I have made out of the same aluminum.
my plan is to use 2 6ft long 6 inch pvc pipes for the floats, with end caps that will be glued with pvc cement. i will use 1/2 threaded stock for the verticle supports that will be cut to length and will run from the angle aluminum, straight down through holes i will drill completely through the floats, and fastened with washers and locking nuts, and holes will be siliconed so that will be watertight.
i plan on filling the floats with some foam. this is my question:
marine grade foam is expensive. ive read on several forums about people using "Great Stuff" insulating foam that can be bought at home depot. From information i got off of dow chemicals website, i figure about 3-4 cans per float should fill them up completely. I will then cut the excess foam off, cap and glue the ends, and drill my holes for the supports.
i have read that even though this is a closed cell foam, this foam may deteriorate out in the elements, however, it will be in a water tight pvc float, far from out in the elements. will this foam work for what i need it to do? the pourable marine foam is just too expensive.
thanks in advance.
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similiar set up|
Posted by: old_user on Aug-22-13 6:11 AM (EST)
i basicly have the same set up on my 15ft canoe that you describe and havnt had any trouble...and after all for no more money that great stuff or the like costs it would be no big deal to reapply if ever needed, have fun
don't ya think those outriggers will ...|
Posted by: pilotwingz on Aug-23-13 12:42 AM (EST)
foam in outrigger|
Posted by: bucketlist on Feb-15-15 11:42 PM (EST)
There is a common misconception here. Buoyancy (flotation) is determined by volume and weight. Pounds of lift will be the weight of the water displaced minus the weight of the float. Adding foam inside does not add to the volume of water displaced, but it does add to the weight of the float. If your float is sealed as stated, you will have less flotation with any filler added inside.
... and if the floats are not sealed, ..|
Posted by: Guideboatguy on Feb-16-15 1:42 AM (EST)
Foam-in-a-can products do not produced closed-cell foam. There tends to be a lot of interconnection between bubbles, meaning the stuff gets pretty waterlogged if given the chance. Best to seal the floats and not use any foam.
Be careful with "Great Stuff"...|
Posted by: voyageur47 on Feb-20-15 12:44 PM (EST)
...as it expands as it dries, in ALL directions, and could possibly damage the piping. That being said, it will not ad to buoyancy in closed PCV pipes anyway, so just seal the end caps with PCV glue. BTW - if you search, you can find pointed end caps that will be more hydrodynamic. Still trying to figure out why you want outriggers for anything other than ocean use ? They will definitely get in your way when fishing.
Posted by: bushwacker on Feb-24-15 12:44 PM (EST)
Mostly we use paddles for canoes. I agree with those that wonder why you think you need outriggers
The OP is gone|
Posted by: Guideboatguy on Feb-24-15 4:29 PM (EST)
"old-user" is the name applied to anyone who's no longer associated with this website.
It is not closed cell foam.|
Posted by: Big_D on Feb-25-15 2:38 PM (EST)
Once the skin is breached, it will absorb and retain water. Unless those outriggers are perfectly water tight and stay that way, they will not be floats but sinks.
Posted by: ppine on Mar-15-15 3:23 PM (EST)
Canoes are one of the great inventions by man. They are made to be paddled and you do not need outriggers. Learn the skills and enjoy the boat more.