Re: Glues?

[Bob Etter]

'Could someone refresh my memory about glues.

I know that the old Plastic Resin is good and is acceptable, and all you need is the availability of an Ace or True Value Hardware store to buy it.

Is there any of the 2 part epoxys that meets with FAA approval for use on the old airplanes? Or are they still mired in the 20th century. Some of the stuff that I've tried to use in the past, was more trouble that it may have been worth.

I tried some of the Hexcel Safety Epoxy that was marketed several years ago, and found it to be pretty good stuff. It was easy to measure, mix, and had a good pot life, but could be a bit messy. But show me any of it that isn't messy.

I am in the process of building a new Horizontal Stab. for the 24. I opened up the old one and found most or all of the bolts were anywhere from slightly rusted to very rusted. The elevator hinge areas were the worst. At a minimum, the holes in the rear spars needed to be bored out, plugged, and re-drilled. The wood was in good shape, but most of the glue joints weren't.

I did find that the right side rear spar had a crack that ran from the tip inboard about 30". Some how the filled the crack with glue, from the outside, than they covered the whole area with a layer of 1/16" plywood. It looks like this happened very early in the history of the stabilizer. There was no over spray or stray paint under the plywood.

Help, if you can.

Bob
rletter@citlink.net
775-482-6820

[Non-text portions of this message have been removed]'

[Buell Powell]

'Hi Bob,
Resorcinol glue is a 2 part and approved and is resistant to
almost anything. It is used a lot in old wood boats and seems to last as
long as the wood-even where there is high moisture. Another 2 part is
T88 that a lot of people are using. It is good to use where you might
have uneven places because it can be used for a filler. If you need to
fill it some places you can mix it with sawdust to make a paste. I like
to use fiberglass resin and sawdust to make a filler because it will
never deteriorate. Both are available from Aircraft Spruce or Jamestown
distributors (1-800-423-0030). Hope this helps--
Buell

Bob Etter wrote:

>
> Could someone refresh my memory about glues.
>
> I know that the old Plastic Resin is good and is acceptable, and all
> you need is the availability of an Ace or True Value Hardware store to
> buy it.
>
> Is there any of the 2 part epoxys that meets with FAA approval for use
> on the old airplanes? Or are they still mired in the 20th century.
> Some of the stuff that I've tried to use in the past, was more trouble
> that it may have been worth.
>
> I tried some of the Hexcel Safety Epoxy that was marketed several
> years ago, and found it to be pretty good stuff. It was easy to
> measure, mix, and had a good pot life, but could be a bit messy. But
> show me any of it that isn't messy.
>
> I am in the process of building a new Horizontal Stab. for the 24. I
> opened up the old one and found most or all of the bolts were anywhere
> from slightly rusted to very rusted. The elevator hinge areas were the
> worst. At a minimum, the holes in the rear spars needed to be bored
> out, plugged, and re-drilled. The wood was in good shape, but most of
> the glue joints weren't.
>
> I did find that the right side rear spar had a crack that ran from the
> tip inboard about 30". Some how the filled the crack with glue, from
> the outside, than they covered the whole area with a layer of 1/16"
> plywood. It looks like this happened very early in the history of the
> stabilizer. There was no over spray or stray paint under the plywood.
>
> Help, if you can.
>
> Bob
> rletter@citlink.net
> 775-482-6820
>
> [Non-text portions of this message have been removed]
>
>

'

[Michael Denest]

'Resorcinol glue is the only FAA approved adhesive to be used in aircraft woodwork.  However AC43-13-1b outlines what type of epoxies may be used.  Epoxy conforming to MIL Spec standards may be used by prior approval (FAA Form 337 Field Approval).  Check 43-13 for a complete description of wood repair methods.  You can download the sections from the FAA website, http://www.faa.gov. 

 Mike


Quando omni flunkus moritati
(If all else fails, play dead)
- "Red" Green



----- Original Message ----
From: Bob Etter
To: fairchildclub@yahoogroups.com
Sent: Thursday, June 5, 2008 10:20:26 PM
Subject: [fairchildclub] Glues?


Could someone refresh my memory about glues.

I know that the old Plastic Resin is good and is acceptable, and all you need is the availability of an Ace or True Value Hardware store to buy it.

Is there any of the 2 part epoxys that meets with FAA approval for use on the old airplanes? Or are they still mired in the 20th century. Some of the stuff that I've tried to use in the past, was more trouble that it may have been worth.

I tried some of the Hexcel Safety Epoxy that was marketed several years ago, and found it to be pretty good stuff. It was easy to measure, mix, and had a good pot life, but could be a bit messy. But show me any of it that isn't messy.

I am in the process of building a new Horizontal Stab. for the 24. I opened up the old one and found most or all of the bolts were anywhere from slightly rusted to very rusted. The elevator hinge areas were the worst. At a minimum, the holes in the rear spars needed to be bored out, plugged, and re-drilled. The wood was in good shape, but most of the glue joints weren't.

I did find that the right side rear spar had a crack that ran from the tip inboard about 30". Some how the filled the crack with glue, from the outside, than they covered the whole area with a layer of 1/16" plywood. It looks like this happened very early in the history of the stabilizer. There was no over spray or stray paint under the plywood.

Help, if you can.

Bob
rletter@citlink. net
775-482-6820

[Non-text portions of this message have been removed]






[Non-text portions of this message have been removed]'

[ROBERT COON]

'Hey Bob,
We've used T-88 throughout and have very good success with it. Like Buell, I've used it as a filler with sawdust. T-88 is very, very strong. I just rebuilt my vertical with very good success. Hope this helps. Bob

HB-690
UC-61K

Bob Etter wrote:
Could someone refresh my memory about glues.

I know that the old Plastic Resin is good and is acceptable, and all you need is the availability of an Ace or True Value Hardware store to buy it.

Is there any of the 2 part epoxys that meets with FAA approval for use on the old airplanes? Or are they still mired in the 20th century. Some of the stuff that I've tried to use in the past, was more trouble that it may have been worth.

I tried some of the Hexcel Safety Epoxy that was marketed several years ago, and found it to be pretty good stuff. It was easy to measure, mix, and had a good pot life, but could be a bit messy. But show me any of it that isn't messy.

I am in the process of building a new Horizontal Stab. for the 24. I opened up the old one and found most or all of the bolts were anywhere from slightly rusted to very rusted. The elevator hinge areas were the worst. At a minimum, the holes in the rear spars needed to be bored out, plugged, and re-drilled. The wood was in good shape, but most of the glue joints weren't.

I did find that the right side rear spar had a crack that ran from the tip inboard about 30". Some how the filled the crack with glue, from the outside, than they covered the whole area with a layer of 1/16" plywood. It looks like this happened very early in the history of the stabilizer. There was no over spray or stray paint under the plywood.

Help, if you can.

Bob
rletter@citlink.net
775-482-6820

[Non-text portions of this message have been removed]






[Non-text portions of this message have been removed]'