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Hey everyone
On the weekend just gone, i finally got around to installing my false floor in my 3.9 savage tinny.
To get more room in the boat i pulled out the centre seat in the boat which was only used as a storage space.
I am wondering if pulling this seat out was such a good idea as i never took into account that it may have strengthened the sides of the tinny.
Does anyone have any comments or info on this. It still feels like a very rigid little tinny but i am just curious
Thanks Josh
most small tinnies, the seats form part of the structural strength of the Boat, if they are removed, usually there is full topsides on the gunnels, this gives the Boat some stregth back again.
Hey josh, welcome to ausfish.
You might want to get an expert opinion on this.
Having said that, Noelm has nailed it for mine.
You may need to get side decks put on to regain strength, or just replace the seat. Did you cut it out?
Cheers.
YEah i just cut it out as i have seen other tinnies gettin around with just the two seats. having said that it still feels very strong but thats just coming from me. i am not sure what to do as i cut it out. any ideas?
mate you could just make up a frame or two to fit in the boat bit of mucking around to get the shape a snug fit - could use either aluminium c section with ply packers or pine 75 x 19 mm / with glued plywood gussetts - if you use aluminium c section you could get it welded once you have the shape right - then revit it in or if you use timber you could SS screw it in with silaflex - frames are quite strong and thats how plywood boats have been built for years i built a harleys 6m TS using that process and if you have a look around quite a few pressed alum tinnys have aluminium frames to longer flatish side strengthen sections - see you rob
Are there any frames left from where you cut the seat away?
I used to have a 4m tinnie '82 vintage with two thwarts/seats - 1 front, 1 rear and these were welded in between to ribs/frames on each side. It had one frame/rib in between the two thwarts and was as tough little number. I have attached a pic that may help, it was the only one I could find at short notice. The blade of the oar is sitting on the rear thwart and the front thwart one is just out of picture to the left. The Gunwhale extrusion is std C section.
I think we need to clarify what is meant by "strength" when the seats are removed, more than likely the Boat will be plenty strong enough, the seats give it cross ways rigidity, so it may end up a tad "wobbly" remember most of those have no floor or side gunnels, so the seats is the only thing that stops the sides wanting to come together, pretty extreme I know, but if it happened it would be at the very worst time when conditions would be bad, get what I mean?
Thanks everyone for all ur input. I went and got it checked out by the local marine dealer and he said as long as i dont overload it it should be fine.
Noelm plus you have the issue of fatigue and welds spliting wit the increased "wobble"
Josh how high is your flood mounted from the bottom of the hull? Does your hull have full ribs running to the top or near the top of the sides? what did you fit under the floor to hold it up?
i would look at welding some cross members across each rib to hold the floor up and regain your rigidity maybe some vertical centre struts too from the cross members to the bottom of the ribs too.
I have just had my centre set removed from a 74 Quinny and had new ribs put in where the seat was. This was done by a pro boat builder at Browns Plains. Only way to ensure the integrity of the hull.
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