So your not cutting an entire blade out of foam then laminating the blade with fiberglass? Instead it looks like your building a hollow blade with spars like an airplane wing, is that right? The Arrow and the fiberglass mat are all that's running the length of the blade then?
My thought was that you were carving the blade out of a sheet of insulation same as carving one out of wood. I will try that later.
I been wanting to build a surfboard type sail boat this way. Laminate the insulations together and cover with fiberglass. I think it would be fun to take to Canada next trip for on the Montreal river and others. I have not had time to build it though. Sort of a cross between canoe, Kayac, and sail boat. With a small trolling motor for no winds or up stream power.
Foam can be very strong itself when thick or covered, and it's very light weight.. nothing to lose
Spelin and tpying are my strong points, not electronics.
Heat those cutters up with a torch and use them to perfect cross sections in the foam sheet.
With that techique you could use a lot more foam "ribs" on each spar and make nice skeleton for fiberglass. It would also make the construction process very repeatable.
Alternatively you could have cross sections jet cut out of aluminum and use a hot wire to cut using the sluminum as the pattern.[ Parent ]
