mini,
No, I didnt weigh the foam but I am keeping track of the epoxy I use. So far I've used 3.75kg for the outside of the hull alone
1.5kg to wet the cloth ( 7.5 sq m x 0.2 kg/m )
2.25 kg to fill the foam ( 7.5 sq m x 0.3 kg/m )
Pilgrim,
50% fiber content and about 1 oz/ sf (300g/m2) is still pretty typical for hand lamination.
You do not save weight, but by wetting the foam and then working to press the fiber through the resin rather than the other way it works a bit easier, especially with carbon as the carbon is a lot more work to get properly wet out. With some practice you can get 60% fiber content, 70 will require bagging.
On the material weights I have to agree with mini.
They make the core in a huge bun with the heavy density material at the bottom and the light at the top. It gets sliced in ranges and we have seen variance easily as high as 25% from order to order. Their spec sheet says 10% typical. There used to be a Diab University or some such name. The H80 has a 1 oz per sf value and adding cuts, perfs, or the groove core for infusion can be more than double that in practice. We have how to sheets that all use these same numbers from them, but I do not know if it is on the web site. This is not something to brag about. There are a lot of other choices in core, some take even more resin. Some cores have a much finer cell structure and take less. We have proven these numbers in test lams and in practice. Even the very fine cell structure on the expensive Rohacell stuff only save maybe 25% in resin for the wet out.
By the way, running test samples of your parts is a very good idea. This will tell you the real weights and usually point out trouble spots like you had bunching the fiber on the sides.
Good luck
