Us Wozzies like trying different things as you may be well aware. This is my latest evil experiment attempting to lay up a flexi fin for the Moonrocket.
There is an environmental aspect to this as well with recycled board skin and a cardboard core used.
The layup for the first half is 1 x 5oz, 1 x carbon fibre, 2 x 5oz 2/3 length, 2 x 5oz 1/3 length, 1 x 5oz full length, then the cardboard core, then reverse the layup for the rest.
All this was put onto a piece of recycled board skin taped up to form a dam with another going on over the top after all the glass was wetted out. I used 150g of epoxy for this one.
I had to cover up the edges of the cardboard with tape so the resin didn’t get inside the corrugations.
You guys will try anything! Full marks for effort.
If it’s going to be a box fin, make sure you have a bit extra reinforcing in the bottom few inches, sorry centimeters. (the local measuring is getting to me)
Also good to see the carbon to stiffen it up. I hope you’re using epoxy.
Yeah Wildy, I only use epoxy. When it comes to boxing it up I’ll be wrapping the whole base in 5oz (cos that’s all I got) extending up the sides about 2.54cm.
Should be interesting, as it’s only been 1 deg C (35 deg F) here during the nights so I’m expecting it to be set in maybe 2-3 days…unless I can talk Jo into letting me put it inside the house where it’s nice and warm…
it will probably get WORSE , before it gets better !
Grant was talking about a cardboard SURFBOARD [“the card BOARD” ] last time I was there …
now , if you can just get Kelloggs to sponsor you , Grant …you’ll be SET !! [“Coco popouts”?? “fruity loopy boards” ? “honey [lip] smackers” , perhaps !!!] …the mind [or what’s LEFT of it ] BOGGLES !!
Hixx, if you want a really flex fin I recommend to build it from chopped-mat glass (that one used for rough boat glassing).
My brother had a trifin which fins were made of this. They 3 were so flexy!! When you were paddling out and he was surfing the wave you were just passing over, you can literally listen them shout!!! People often asked me why my brother liked to shout while he was surfing…it was not him, it was the board!!! Very funny.
