casniffer

My Feedback: (1)

Hi,
I am ready to try my hand at vacuum bagging wings. I've read a lot of posts in the composite fabrication and repair section and elsewhere with respect to vacuum bagging, but I haven't seen much of anything about finishing the trailing edge, leading edge and wing tips. I have everything but epoxy and will probably go with West Systems since I can buy it locally.
I would appreciate any suggestions and techniques for finishing a wing after bagging.
Thanks
CASniffer

soarrich

My Feedback: (98)

http://genie.rchomepage.com/FINE%20F...20PAINTING.pdf

Ed Smith

I would suggest you do not use west systems. West systems starts to set up fairly quickly, (30 minutes or so). this may not give you enough time to get everything on the wing and into the bag. If you have no choice then get the slowest hardener you can for the resin. There is nothing worse than having to rush to get it all in the bag because the resin is curing. If the resin starts to set up too soon, excess will not bleed through the peel ply into the breather. The result will be one heavy wing.

I use MGS resin, the slowest hardener will allow 4-5 hours working time.

Ed S

Newc

Typically the LE and wing tips are put on after the bagging is completed, while the TE may be part of the bagging preparation, ranging from a caron fiber reinforcement to simply trimming the TE after the bagging is completed.

I like using Gorilla Glue for the bagging instead of epoxy. Less weight, plenty of time to work with it, no mixing required and extremely strong bond.

hayman

That and many more questions you are going to have about Vacuum Bagging Wings are answered [link=http://www.paonline.com/hayman/video.htm]HERE[/link].

slkret

Newc:
Am I understanding that you are substituting gorilla glue for epoxy for the actual glass layup?

Steve

Troy-RCU

My Feedback: (1)

I'm assuming he means for bagging balsa skins. I tried some Gorilla Glue with carbon alone and it was a so-so result. OK for reinforcements under balsa skins but not a good replacement for epoxy and cloth.

Newc

Right, I was referring to using Gorilla Glue for balsa sheeting foam, not as a substitute for epoxing fibreglass. For that - fiberglassing the balsa sheeting in preparation to painting - I use polyurethane instead of epoxy.

For a free video about vacuum bagging, go to this site http://www.rcgroups.com/links/index.php?id=4901

casniffer

My Feedback: (1)

Thanks for all the responses. You guys are the best.
CASniffer