- Thanks for the comments Jeff, I agree pontoons would have their own overheads and defeat some of the purpose of having such an elegant boat. I just went downMessage 1 of 4 , Jan 24, 2010View SourceThanks for the comments Jeff,
I agree pontoons would have their own overheads and defeat some of the purpose of having such an elegant boat.
I just went down to the beach once more and did some experimentation. Basically me and the two kids ended up on the floor and the stability improved out of sight. My position was constrained by the seat position so was not optimal but was good enough.
The seats are placed as per the plans. The fore and aft location looks ok to this inexperienced boat builder. I don't think it would matter where you put them fore or aft, they are just too high. I could drop them down to the next stringer but first I'll have to cut them out and have a bit of a play with just kneeling or with some cushions.
In all I was very pleased with the outcome from this morning and it gives me a lot of hope that I'll be able to work it out. I'll update the group if I learn anything worthwhile.
--- In Airolite_Boats@yahoogroups.com, "Jeff" <jlaman@...> wrote:
> I would discourage you from going the pontoon route -- that is a very cumbersome solution that defeats the purpose of a canoe -- sleek, fast, easy to handle, and light weight. Your problem to be solved, as you recognized, is the center of gravity location. You don't say where the seats are vertically, but I suspect they are near the gunwales. Calculations for the inexperienced are complicated, so I suggest you experiment a little. I have built two plywood canoes and a kayak, all with about 24 to 28 inch beams -- lots of potential for instability. On the kayak, I lowered the sitting position 2 inches and it went from unmanageable to a joy -- it makes that much difference. On one of the canoes I put the seats 4 inches above the bottom -- no stability problems at all and still very easy to paddle. Also keep in mind that two children can disrupt stability of any craft in a hurry. Good luck with the sweatpea -- that's great that you are building one for the kids! Just do some experimenting with the seat height using cushions or something easily adjusted and removable before making a final installation. Let us know how it goes!
> --- In Airolite_Boats@yahoogroups.com, "Tim" <tim.ryan95@> wrote:
> > Hi all,
> > Launched my Snowshoe14 two days ago with champagne and friends along to admire etc. It was a fun affair and a great way to end my first journey into boat building. However to my dissapointment I found the canoe to be highly unstable. Very tippy with no secondary stability. First launch was with myself and two kids (9 & 7 yrs). Nearly came out in the first seconds and had to work very hard to keep it upright for the duration of its short journey. Kids were glad for it to end. Second go was with two adults who fell out instantly (ok, there was a little bit of swell at the beach but they were over all too easily). The boat driver in this second launch is very experienced with Canadians. Similarly I've had some experience in a conventional fibreglass canadians and I didn't feel the problems were due to my skill level. The big upside was just how good it felt when we were moving along - so light it takes no effort to move it along.
> > I took the option to put seats in and I can see that these have put peoples the centre of mass much higher than if they were not there (but I don't fancy kneeling for extended periods of time).Still I will give it a go by trying to avoid the seats and kneel down to see if I can get the hang of it.
> > There was a recent post from Chris who had a similar experience. He said he has built pontoons to improve stability and will post details (please do) so I will explore this option.
> > I've started building a Sweatpea for the 9 & 7 yr old kids but I'm wondering if these will have similar stability issues. I want some thing that is easy and fun for the kids. If it is all too hard for them I would be better off buying a plastic sit-on-top. Would be interested in peoples comments on this.
> > cheers
> > Tim
- I have an Arrow 14. I know it s a lot different than the Snowshoe, but it sounds like the stability issue is similar. I find that I have to sit on the floor.Message 2 of 4 , Jan 24, 2010View Source
I have an Arrow 14. I know it’s a lot different than the Snowshoe, but it sounds like the stability issue is similar. I find that I have to sit on the floor. Even a 1” cushion reduces stability significantly. I added an upright cushion against the rear thwart that I can lean back on, and foot rests on the forward thwart. I’m more or less comfortable. I use a long kayak paddle. I have never tipped it, but I also haven’t tried.