Originally Posted by Sailormantx
There is one other measurement I forgot to give you, the mounting tube center is 1.75 inches back from the leading edge of the paddle.
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Thanks for the measurements. I have everything I need now. The only modification I might do is make the bottom of the oar rounded or elliptical.
It took me all day but I found a 38mm stainless pipe which is 1.5mm thickness, at least it's thicker than the original pipe, and it fits perfectly _inside_ the safety
tube, not outside so it's slightly smaller than before, but 50% thicker I think it will work.
I couldn't find any galvanized that was the right size.
I don't have any spare safety
tubes, but I never broke mine... I have heard from other people that the hinge pops out and the oar lifts normally.
The safety tube on scanmar's site is $58!?! I got the stainless pipe that is a meter long here for $8 today. It should be possible to order a stainless pipe of the right diameter to make a safety tube much cheaper at least.
I also found polyester resin, unfortunately no epoxy
So the plan is to get 6 or 7 stainless bolts to go through the pipe. These bolts will fit inside a hole drilled in the 6 or 7 plywood
ribs. I have 1 inch plywood
. I may also have additional hardwood in parallel with the stainless pipe on the leading edge for impact, and farther back for extra support. Then I can wrap the whole thing with 3 layers of glass.
I will try to post pictures in the next day or two.