Jump to content
Sign in to follow this  
aviator_edb

Epoxy on underside of foam

Recommended Posts

I've been really picking up steam on chapter 4 and only have the front side of the IP, the landing gear bulkheads and firewall to do.

 

I have a new question. On some of the layups, specifically f-22, 28 and the IP, I had a helluva time keeping excess expoxy from running off and then under the foam. For F-22 and 28 there was only a bit and I easily sanded it off but on the IP I've got a spot that's about 9 sq. in. Do I really need to get that off or can I just rough it properly with 30grit and glass over it?

 

as usual, thanks for any input.

Share this post


Link to post
Share on other sites

I say just knock off any bump it may have made and rough it up and glass over it. Build on as Steve would say.

Share this post


Link to post
Share on other sites

I've been really picking up steam on chapter 4 and only have the front side of the IP, the landing gear bulkheads and firewall to do.

 

I have a new question. On some of the layups, specifically f-22, 28 and the IP, I had a helluva time keeping excess expoxy from running off and then under the foam. For F-22 and 28 there was only a bit and I easily sanded it off but on the IP I've got a spot that's about 9 sq. in. Do I really need to get that off or can I just rough it properly with 30grit and glass over it?

 

as usual, thanks for any input.

Just get out your FEIN with a sanding head (40 grit), knock off the extra epoxy in a heartbeat. and the resulting surface will be great for further bonding.

 

What you don't have a Fein???????-- Shame on you!!!!!:mad::confused:

Share this post


Link to post
Share on other sites

I hardshell both sides prior to glassing. End of problem.

 

Foam that has not been sealed with micro can wick up a lot of epozy adding weight. Think of the micro-slurry as you would sanding sealer.

Share this post


Link to post
Share on other sites

I hardshell both sides prior to glassing. End of problem.

 

This is not an approved method of building.

I have never done it so proceed at your own risk. If you are slopping on that much resin maybe you need to slow down and be more careful. I like to use my brush and stiple around the edges so I dont have to squeege loads of epoxy off the edges which causes this problem. But like others have said it is no big deal sand it smooth and yes it is comming Build on STeve

Share this post


Link to post
Share on other sites

I hardshell both sides prior to glassing. End of problem.

 

Foam that has not been sealed with micro can wick up a lot of epozy adding weight. Think of the micro-slurry as you would sanding sealer.

hard shell all the parts? you mite end up with a heavy plane that you wont like to fly, have you ever grabed on to the side of a bulk head and tryed to remove the glass ? you mite find its as easy as peep ply.

Share this post


Link to post
Share on other sites

I've been really picking up steam on chapter 4 and only have the front side of the IP, the landing gear bulkheads and firewall to do.

 

I have a new question. On some of the layups, specifically f-22, 28 and the IP, I had a helluva time keeping excess expoxy from running off and then under the foam. For F-22 and 28 there was only a bit and I easily sanded it off but on the IP I've got a spot that's about 9 sq. in. Do I really need to get that off or can I just rough it properly with 30grit and glass over it?

 

as usual, thanks for any input.

some of us do it with templets and a router, so all the over-spill is cut off

a fast clean way to do all the bulk heads. no cutting, no sanding,

you do all your fussing with masinit 1/4".

Share this post


Link to post
Share on other sites

This is not an approved method of building.

 

This has been discussed at length already. I have it from an engineer at scaled that it's not an issue ........ but we digress.

Share this post


Link to post
Share on other sites

some of us do it with templets and a router, so all the over-spill is cut off

a fast clean way to do all the bulk heads. no cutting, no sanding,

you do all your fussing with masinit 1/4".

 

Clean????

 

Been there, done that

 

I'm still pulling the resultant airborne fiber and epoxy dust out of my personal glass.:irked: (I even used a vacuum system directly over the router)

 

a better way is to layup as you would for routing, however use a sharpie to mark actual size and shape or cut out template and glue on cured glass and cut out with metal cutting band saw.

 

The band will last for quite a while, however after the first cut, the blade will be unable to cut metal well.

Share this post


Link to post
Share on other sites

I had the same problem, and sanding worked.

 

But what about on the glassed sides. I had a bit on the inst panel glassed underside. How can I remove that and keep the nice glassed finish?

 

Thanks,

 

Derek Lewis

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×