Anyone have experience with fiberglass?

[fairgentleman_Z]

@LAFENGAS

Why? because fiberglass if very heavy when hand laid (high resin/fiberglass ratio) Unless you have a vacuum bagging system will you be able to make it reasonably lightweight. Vacuum bagging requires a fair amount of mold experience to understand how your mold and plug behave under vacuum. Now you’re just opening a can of worms.

What exactly does the vacuum bag do?

Just sucks all the air out and puts 1 atm evenly over the whole peice, thus requiring less adhesive (epoxy/resin) to bond the layers?

[LAFENGAS]

@fairgentleman Z

What exactly does the vacuum bag do?

Just sucks all the air out and puts 1 atm evenly over the whole peice, thus requiring less adhesive (epoxy/resin) to bond the layers?

correct. Greatly reduces the epoxy weight and it forces the weave tighter together making it much stronger. Also, with semi-complex parts, it helps actually force form the composite to the shape of your mold.