Its not to put something down, far from it. I do have much experience with canoeing but never did build one, nor have i been out in a flatbottomed one, so i am interested in hearing how the flatbottomed canoe will last.Fair point, well presented. I understand that flat bottoms sit very high in the water so the chances of contact with underwater stuff "should" be reduced, as for dropping heavy stuff in I don't suppose it will be worse than a skinned canoe, but not as as good maybe as a solid fibreglass one.
In truth I don't know because this is the first canoe I have ever built and my experiance is limited to kyaks.
In Denmark we mainly have shallow rivers, with loads of treestumps and whatnot just underneath the surface of the water, and i have cracked open an aluminium canoe on one of those, so basically anything can be sunk in this manner.
However what is a concern about the shape (flatbottom vs. standard "bowl" shape) is the fysics. A bowllike shape will withstand pressure greater than a flat shape. No new wisdom there.
So if you take a canoe with flat sides and a flat bottom, wouldn't that increase the risk of failure tremendously?
Just my thoughts. I will look forward in seeing the end result, and hopefully a little review in time?