-- Last Updated: Sep-16-13 1:17 PM EST --
I have an old woodstrip pro boat. I've enjoyed paddling it from time to time but I do notice that it is a PAIN to get it around the tight twisty corners of our tiny local river. Awhile ago I took a look down the keel-line and noticed that it has at least 1" of hog in it -- the ends are well lower than the middle of the hull. Ouch! That makes me think it would run straighter than straight. So I've unfastened all thwarts and seat-braces and have wedged the gunnels wider -- about 2.5" in the middle and 3" about 5' from the ends. Now the hull is pretty flat. The hull made some strained sounds as I wedged those gunnels wider but in general they seemed fairly flexy and nothing has cracked. I haven't permanently lengthened my alum-tube thwarts yet.
Now, given our twisty river I'm wondering if it might be nice to actually have a touch of rocker in this hull. It might be neat to be able to actually whip around my turns. Or maybe I should be happy with just getting it flat again.
Anyway, do you think I'll find that it turns a lot easier now that it's back to being flat rather than concave?
Like, a flat-keel boat tracks straight. Is it really possible that a hogged boat tracks "straighter than straight"? I suppose so because when leaned the ends won't come out of the water. Is that basically the main dynamic in turning? Not many people really lean a touring hull and they talk about "tracking" so maybe there's something else going on. Well, hogging can't be good.
Widening my tumblehome or whatever it's called might also increase my final stability, not that we need much of that. But we're not edgy racers anymore. I like a light fast boat still but the old pro boat might behave more kindly when it's loaded than it used to. Now I can be rewarded for tossing a cooler and duffles in it rather than getting scared!
I hope the hull won't mind the stresses of the wider thwarts. It's under new tension.
It was an old garage sale find so it won't be such a big deal of something odd happens. ...I wonder what I could do to relieve the tension or if it will eventually warp/adapt to it. It has a glassed exterior.
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Read too fast. You think wider thwarts|
Posted by: g2d on Sep-16-13 6:31 PM (EST)
would help your hog? By letting him roam wider?
Wider thwarts seems to reduce hog|
Posted by: JeffOYB on Sep-17-13 9:31 AM (EST)
I made a paper boat and when I spread the sides the ends went up. So I loosened my stripper thwarts then wedged them to spread the gunnels wider and the hog seems to have left the bottom of the hull.
Agree with JeffOYB|
Posted by: yatipope on Sep-17-13 12:27 PM (EST)
In my experience working with Royalex canoes,..widening the center (installing a longer carry thwart) will actually increase rocker. I usually always shorten my thwart to narrow the gunwale beam to make solo paddling more enjoyable by creating slight tumblehome. This does however reduce rocker though so not so good for whitewater or manueverability.
Posted by: pblanc on Sep-17-13 12:33 PM (EST)
small stream boat|
Posted by: ppine on Sep-17-13 12:36 PM (EST)
Maybe the answer is a different boat. Canoes with a straight keel line are a pain in the butt on twisty rivers and streams. I love boats with lots of rocker even for lake paddling.
Widening the center thwart on a Tripper|
Posted by: g2d on Sep-17-13 3:34 PM (EST)
increased flatness in the hull's center, and might have led to hogging if I had gone further. I wedged a foam pedestal seat between that thwart and the canoe bottom, and ended up with a bit more rocker, and a wonderful center pivot zone that made my Tripper quite a bit better in whitewater than the rest.
Posted by: canoeracer on Sep-17-13 3:55 PM (EST)
Widen the thwarts and run a center board down the inside bracing down from the thwarts. This will help with the hog and make it turn better. Make sure to store the canoe right side up. Most canoes will hog if stored upside down for a long time. Good luck.
Normal storage is upside-down|
Posted by: Guideboatguy on Sep-17-13 4:42 PM (EST)
Gee I have 17 canoes that range|
Posted by: kayamedic on Sep-17-13 6:36 PM (EST)
from six to 100 years old. All are stored gunwale down. None are hogged. None are polyethlene or whatever crud Coleman uses.
Hog, as in BBQ|
Posted by: CEWilson on Sep-17-13 6:26 PM (EST)
Most hog is built into wood strippers on the form. There is a tendency to nor account for the strips bridging at the stems.
You might try...|
Posted by: Al_A on Sep-18-13 2:31 PM (EST)
replacing the center thwart with a sturdy wooden one that won't bend before the hull does, and then put a brace from it down to the hull to try to force the hull downwards in that area and eliminate the hogging. I would think that might have more of an effect, and a more predictable effect, than spreading or pinching the gunwales at the thwarts.
Fight pork with porker. Carry a 500#|
Posted by: g2d on Sep-18-13 2:54 PM (EST)
hog in the center of your boat.
Posted by: rblturtle on Sep-18-13 4:00 PM (EST)
Hog can be considered negitive rocker maybe? I have changed seat and thwart length on two royelex boats with great results. One was a Wenonna Sandpiper I widened to make it a more manoverable small creek boat. The bottom flattening a plus as it allowed it to float in shallower water. The second was an Esquiff Echo that I shortened seat ect to get a narrower paddling position. This reduced the rocker a little,but not enough to hurt it's great handling.
I would stop short of causing a canoe|
Posted by: g2d on Sep-18-13 9:56 PM (EST)
hull to "hog", no matter what my goal. Some Royalex hulls are amenable to rocker adjustments, but if spread so hard that they hog, they'll lose speed. Glad your Sandpiper experiment came out OK, but leaning or edging the boat is another way to extract maneuverability without losing speed.
Talk to Tom|
Posted by: rival51 on Sep-18-13 10:37 PM (EST)
Jeff, have you talked to Tom Cannon about that stripper? He might recognize the hull & have some ideas.
report and pics of anti-hog project...|
Posted by: JeffOYB on Sep-25-13 8:01 PM (EST)
Thanks, everyone, for the ideas!