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Old 30 August 2016, 12:56   #31
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Hi Stig I'm running a Tohatsu 20hp 4 stroke.
My seat is always attached as it carries my fishfinder.
The box carries tools, fishing gear, spares, filleting knifes, first aid kit, my man sized packed lunch etc. Even got room for beer😊
I must say that the bulge is very miniscule - barely noticeable in fact. I always repressurise the tubes and floor after 10 mins in the water.
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Old 30 August 2016, 13:25   #32
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Originally Posted by kaman View Post

My seat is always attached as it carries my fishfinder.


I must say that the bulge is very miniscule - barely noticeable in fact.
Ditto the fish finder/plotter.

Hmmm, I wish mine was... so I'm going to try running with 2 seats in the next time I go out and see if bracing between the 2 tubes adds rigidity and lessens the hump...

Watch this space...
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Old 30 August 2016, 13:53   #33
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I get the seat acting as a brace and would say it does a lot of good as I said before the tube line does seem to have moved in the picture I might be wrong but for the bulge to appear something has to give does the boat narrow or widen hence the seat helps either way?
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Old 30 August 2016, 14:12   #34
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When I was on the Scottish SIB trip I hardly suffered the bulge, but the seas were far from glass like.
I arranged those waves especially so that you folks with blowy-up-boats wouldn't get frustrated...
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Old 30 August 2016, 16:52   #35
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Battling the Bulge, with a Trim?

Just my tuppence, the 3.2 honwave I've got with me and the missus, who isn't much heavier than a tank of fuel - shame in this case - I get that bulge you mention no matter what, pressures all ok. I've chosen to accept it, knowing full well a solid hull wouldn't drag so much, it's just the way it is for now.. Maybe the Scottish scenery was a distraction?
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Old 30 August 2016, 17:05   #36
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It'll take some searching but there was a thread I read a year or so back, said the poster he knew a thing or two about the dynamics of a boat and suggested plying out the inside of the hull/deck, to push down the bulge. I cannae change the laws of physics https://youtu.be/nfZ12UGiisM look forward to hearing the results
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