fibreglassing, vac bagging, and reducing weight
Posted: Tue Jun 21, 2011 11:49 pm
In the spirit of Kaptain Zeros post here, I thought I would throw my questions up here as well.
When fibreglassing and vac bagging, the way I understand it you take off as much epoxy as possible via scraping and soaking up the excess. On a DLG balsa tail I did recently it turned out too dry and wasn''t adhered well, coming up in many parts. I did have problems with vac leaks so I wasn't pulling full vacuum, so maybe this made the difference??
What I was wondering about was using a peel ply that lets the epoxy seep through, paper towel on the other side of that. My thought was to throw the parts in the bag with this peel ply and pull vac for a few minutes to get out as much epoxy as possible, but still have enough epoxy there initially to ensure a good bond between the glass and balsa/foam. Once its all been pulled out, then wack on the mylars so you end up with a nice glassy surface as the peel ply has a texture to it.
Is this the idea, or wrong tree to bark up? Any better ideas then please direct me
Cheers, Stu
When fibreglassing and vac bagging, the way I understand it you take off as much epoxy as possible via scraping and soaking up the excess. On a DLG balsa tail I did recently it turned out too dry and wasn''t adhered well, coming up in many parts. I did have problems with vac leaks so I wasn't pulling full vacuum, so maybe this made the difference??
What I was wondering about was using a peel ply that lets the epoxy seep through, paper towel on the other side of that. My thought was to throw the parts in the bag with this peel ply and pull vac for a few minutes to get out as much epoxy as possible, but still have enough epoxy there initially to ensure a good bond between the glass and balsa/foam. Once its all been pulled out, then wack on the mylars so you end up with a nice glassy surface as the peel ply has a texture to it.
Is this the idea, or wrong tree to bark up? Any better ideas then please direct me
Cheers, Stu