Firewall Laminating
02-18-2013, 06:47 PM
#1
Thread Starter
Firewall Laminating
Hi there. I am in process of building a Lazy Bee and am at the firewall stage. I am using 1 piece of 1/32" aircraft plywood and 1 piece of 3/32-1/8" plywood from a pallet. This bird needs the nose weight so am not worried there, but wanted a general opinion on what to use to laminate the two together. I have 5-Minute epoxy from Dollartree and Gorilla Glue Polyurethane glue available to use. Which would be the better choice. If it makes a difference, this will be E-powered. Thank you.
02-19-2013, 04:45 AM
#2
RE: Firewall Laminating
I prefer to use aliphatic resin (like Titebond wood glue) for laminations. Spread it evenly across the surface and clamp the surface together with even pressure (a stack of heavy books works well). The glue will soak into the wood, but the excess glue will tend to squeeze out evenly and leave the two surfaces perfectly mated together. Once fully dry, the wood will fail long before the glue line ever does. Just make sure your surfaces are clean, reasonably smooth, and free of any loose fibers before mating.
Thicker glues like epoxy, which work great when you need to fill a void, will work against you in a lamination, since the glue has more body that can prevent the surfaces from lying flat against each other (creating the potential for uneven thickness), and it really will not add any significant strength to the lamination.
The biggest downside to aliphatic resin is that it is not waterproof, so if you are building pontoons (or a boat) be sure to seal the lamination well.
Thicker glues like epoxy, which work great when you need to fill a void, will work against you in a lamination, since the glue has more body that can prevent the surfaces from lying flat against each other (creating the potential for uneven thickness), and it really will not add any significant strength to the lamination.
The biggest downside to aliphatic resin is that it is not waterproof, so if you are building pontoons (or a boat) be sure to seal the lamination well.
02-19-2013, 04:58 AM
#3
RE: Firewall Laminating
It's just my opinion but I would not use 5 minute epoxy on anything I fly, it cures way too brittle, a slow curing low viscosity epoxy with proper clamping or vacuum bag pressure is your very best option.
Bob
Bob
02-19-2013, 09:20 AM
#4
RE: Firewall Laminating
ORIGINAL: aymodeler
I prefer to use aliphatic resin (like Titebond wood glue) for laminations. Spread it evenly across the surface and clamp the surface together with even pressure (a stack of heavy books works well). The glue will soak into the wood, but the excess glue will tend to squeeze out evenly and leave the two surfaces perfectly mated together. Once fully dry, the wood will fail long before the glue line ever does. Just make sure your surfaces are clean, reasonably smooth, and free of any loose fibers before mating.
Thicker glues like epoxy, which work great when you need to fill a void, will work against you in a lamination, since the glue has more body that can prevent the surfaces from lying flat against each other (creating the potential for uneven thickness), and it really will not add any significant strength to the lamination.
The biggest downside to aliphatic resin is that it is not waterproof, so if you are building pontoons (or a boat) be sure to seal the lamination well.
I prefer to use aliphatic resin (like Titebond wood glue) for laminations. Spread it evenly across the surface and clamp the surface together with even pressure (a stack of heavy books works well). The glue will soak into the wood, but the excess glue will tend to squeeze out evenly and leave the two surfaces perfectly mated together. Once fully dry, the wood will fail long before the glue line ever does. Just make sure your surfaces are clean, reasonably smooth, and free of any loose fibers before mating.
Thicker glues like epoxy, which work great when you need to fill a void, will work against you in a lamination, since the glue has more body that can prevent the surfaces from lying flat against each other (creating the potential for uneven thickness), and it really will not add any significant strength to the lamination.
The biggest downside to aliphatic resin is that it is not waterproof, so if you are building pontoons (or a boat) be sure to seal the lamination well.
I use this method but sprinkle some balsa dust on the glue coated areas. It prevents the parts from sliding around while you clamp the parts together.
02-19-2013, 01:08 PM
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RE: Firewall Laminating
ORIGINAL: NEW222
Hi there. I am in process of building a Lazy Bee and am at the firewall stage. I am using 1 piece of 1/32" aircraft plywood and 1 piece of 3/32-1/8" plywood from a pallet. This bird needs the nose weight so am not worried there, but wanted a general opinion on what to use to laminate the two together. I have 5-Minute epoxy from Dollartree and Gorilla Glue Polyurethane glue available to use. Which would be the better choice. If it makes a difference, this will be E-powered. Thank you.
Hi there. I am in process of building a Lazy Bee and am at the firewall stage. I am using 1 piece of 1/32" aircraft plywood and 1 piece of 3/32-1/8" plywood from a pallet. This bird needs the nose weight so am not worried there, but wanted a general opinion on what to use to laminate the two together. I have 5-Minute epoxy from Dollartree and Gorilla Glue Polyurethane glue available to use. Which would be the better choice. If it makes a difference, this will be E-powered. Thank you.
just my 2 cents...
02-19-2013, 01:34 PM
#8
Thread Starter
RE: Firewall Laminating
Great. Thanks for the tips. I do have the Gorilla Glue white wood glue as well, but did not think that it would be appropriate for this application. Yes I also have the original Gorilla Glue (honey brown color). Thank you.
As for laminating, I will take a look to see if I have anything else to use. I may have 1/16" as well and will then use 2 of them. Thank you again.
As for laminating, I will take a look to see if I have anything else to use. I may have 1/16" as well and will then use 2 of them. Thank you again.
02-19-2013, 05:54 PM
#10
Thread Starter
RE: Firewall Laminating
Ok. Well I laminated 1 piece of 1/32" and 1 piece of 1/16" together with Gorilla Glue Wood glue (white carpenters type). I will let it dry and add the other piece later before bed and let it sit all night. I was honestly not going to add the second piece until you, Vicman, mentioned clinch-nuts. That is where I forgot about the blind nuts behind the firewall. So I will add the other piece to make up space. Thank you for reminding me.
02-19-2013, 07:45 PM
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RE: Firewall Laminating
ORIGINAL: vicman
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