col5555 said..
Just interested to know the appx cost of carbon cloth used in a boom.
What would it cost if using pre preg.

Col,
Don't know about the cost of carbon but did a very rudimentary calc on the square metreage of carbon used for say a 40mm dia 180-230 boom. Each layer used in the construction of the boom including tail piece, head and tail areas is around .85sq.m, so if say guessing there's 5 layers in total (i've included glass layers as carbon here) I reckon really roughly you could say 4.5sq.m* of carbon is used.

*totally wild estimate

You'd probably need 30lin.m (5 layers x 6m/layer) of braided carbon sleeve www.fibreglast.com/product/Braided_Carbon_Biaxial_Sleeve_02609_1/Braided_Sleeves

BTW - sail performed brilliantly on the RDM too.

col5555 said..
Just interested to know the appx cost of carbon cloth used in a boom.
What would it cost if using pre preg.

aren't booms already made with prepreg ?

Mine are
http://al360.distrisurf.com/?page_id=368

100 euros per square meter for the al360 prepreg

in the link above I was amazed to see that they cnc machine 70 "bits" of prepreg to make one boom !

indeed +7000 euros per steel mold (one for each boom size)

I've actually made 2 wave carbon booms years ago and they used hardly any carbon, less than 1m. From memory cost was about $20 per arm, maybe less.

Would'nt ever do it again though, pain in the arse so I just bought new one's from a shop!