Ok, i´m cleared.

Thanks for the advices.

Pedro

depends on what you want.

if you want super light weight and its secured by 4 bonnet pins, then a layer of 200gsm (or maybe slightly heavier) CF cloth either side of soric with edges built flush with tape (like in EC's video) would be strong enough for a motorsport componant and very light. Youd need kevlar patches where the pins are going through just to add a bit of strength in those areas.

It would of course be fairly flexible but if its a curved bonnet should hold its shape ok.  For motorsport would probably be fine as it wouldnt have a long life span in most race series anyway and in motorsport, cosmetics is irrelevant.

I would at least go with two layers on each side if for nothing other than cosmetic reasons. (you could get away with one layer if the underside appearance doesn't matter. If you only use one layer of carbon fiber, you can often see the colour of the underlying material (in this case, the white soric) and it will ruin the look of the hood. Only if you lay the fabric absolutely perfectly will you not get any gaps between the fibers.

As far as for structural purposes, I don't know what is recommended, but the soric does a great job of increasing its stiffness.

Hopefully some of the members who have made hoods can give some advice for thickness.

-Mike-

Hello,

I need to make a cf bonnet, but only one piece(the outside one). The inside part (reinforcement) is not to be made.

What is your opinion about the layers to be used?

1 - 2 cf layer 200grs - soric 2mm - 2 cf layer 200grs 

2 - 2 cf layer 200grs - soric 2mm - 1 cf layer 650grs

Or another one different? 

Thanks,

Pedro