News:



  • May 23, 2024, 09:26:41 AM

Login with username, password and session length

« previous next »
Pages: [1]   Go Down

Author Topic: Sig Weld  (Read 3224 times)

Offline David_Ruff

  • David Ruff
  • Trade Count: (0)
  • Commander
  • ****
  • Posts: 207
  • Retired Army
Sig Weld
« on: February 08, 2014, 02:40:31 PM »
I find that I am using Sig Weld glue often in my builds.  Mostly for high strength areas like the plywood doublers and hardwood to balsa type applications.  It seems to work very well.

Any of you doing that?  I know many times the plans call for epoxy.  But I am using Sig Weld for wood to wood. 

Logged
Just glad to be here

Offline Bill Little

  • 2017
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 12671
  • Second in COMMAND
Re: Sig Weld
« Reply #1 on: February 08, 2014, 03:08:57 PM »
Hi David,

If it wasn't for the fact that I pulled some plywood doublers off of a profile that was 20+ years old and the center area was still not fully cured, I would use it there myself.  Since epoxy is a chemical cure that can't happen.

Sig Weld is a very good glue and I have used a lot myself.

BIG Bear
Logged
Big Bear <><

Aberdeen, NC

James Hylton Motorsports/NASCAR/ARCA

AMA 95351 (got one of my old numbers back! ;D )

Trying to get by

Offline David_Ruff

  • David Ruff
  • Trade Count: (0)
  • Commander
  • ****
  • Posts: 207
  • Retired Army
Re: Sig Weld
« Reply #2 on: February 08, 2014, 03:20:22 PM »
Hmm..interesting.  Maybe not the best for doublers.   But your doublers did not fail?
Logged
Just glad to be here

Offline Avaiojet

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7468
  • Just here for the fun of it also.
Re: Sig Weld
« Reply #3 on: February 08, 2014, 03:25:03 PM »
Ruffy,

Epoxy can be heated and the parts separate easily.

Logged
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS.
Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

Offline Bill Little

  • 2017
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 12671
  • Second in COMMAND
Re: Sig Weld
« Reply #4 on: February 08, 2014, 03:37:53 PM »
Quote from: David_Ruff on February 08, 2014, 03:20:22 PM
Hmm..interesting.  Maybe not the best for doublers.   But your doublers did not fail?

Hi David,

There was about 1" or so all around that DID cure so the doublers never lifted or anything.  Just really surprised to find that gummy area in the middle. ;D

BIG Bear
Logged
Big Bear <><

Aberdeen, NC

James Hylton Motorsports/NASCAR/ARCA

AMA 95351 (got one of my old numbers back! ;D )

Trying to get by

Offline john e. holliday

  • 24 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 22781
Re: Sig Weld
« Reply #5 on: February 09, 2014, 08:25:41 AM »
Yeah, we learned years ago and never thought about it until we had one delaminate.   Epoxy or Gorilla Glue for laminates.
Logged
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.

Offline Steve Helmick

  • AMA Member and supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 9950
Re: Sig Weld
« Reply #6 on: February 09, 2014, 01:56:50 PM »
Some of those type glues (Titebond) can be allowed to dry (on both mating surfaces) and then fused together with heat. I'd worry about the plywood laminations, but heating from the balsa side should work ok. Some guys use this trick for sheeting D-tube and C-tube wings. Might be worth an experiment or two, at least.  D>K Steve
Logged
"The United States has become a place where professional athletes and entertainers are mistaken for people of importance." - Robert Heinlein

In 1944 18-20 year old's stormed beaches, and parachuted behind enemy lines to almost certain death.  In 2015 18-20 year old's need safe zones so people don't hurt their feelings.

Offline dave siegler

  • 2016 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1132
  • sport flier
    • Circlemasters Flying club
Re: Sig Weld
« Reply #7 on: February 11, 2014, 08:40:03 AM »
While we would use epoxy for doublers in our application, a woodworker would always use yellow glue for something like that.  Why is it ok for furnature, but not a model airplane?
Logged
Dave Siegler
NE9N extra class
AMA 720731
EAA 1231299 UAS Certificate Number FA39HY9ML7  Member of the Milwaukee Circlemasters. A Gold Leader Club for over 25 years!  http://www.circlemasters.com/

Offline Avaiojet

  • 22 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 7468
  • Just here for the fun of it also.
Re: Sig Weld
« Reply #8 on: February 11, 2014, 09:10:48 AM »
David,

A bit of heat and they removed quite easily.
Logged
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS.
Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

Offline Jim Thomerson

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 2087
Re: Sig Weld
« Reply #9 on: February 11, 2014, 10:32:00 AM »
What is Sig Weld?  I am using tubes of Sigment.  Making doublers with titebond, I have drilled several 1/32 holes in the plywood to make sure it could all dry. 
Logged

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 13755
Re: Sig Weld
« Reply #10 on: February 11, 2014, 01:12:06 PM »
Quote from: Jim Thomerson on February 11, 2014, 10:32:00 AM
What is Sig Weld?  I am using tubes of Sigment.  Making doublers with titebond, I have drilled several 1/32 holes in the plywood to make sure it could all dry.  

   SIG Weld is a PVA type glue like Elmer's Glue-All.

   SIG-ment used for doublers tends to have the same issue, although with balsa and plywood it usually eventually dries. I use medium CA for doublers myself, using the grid method as shown in the Satellite City videos.

    Brett
Logged

Offline Dick Pacini

  • 24 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1630
Re: Sig Weld
« Reply #11 on: February 11, 2014, 02:24:03 PM »
Brett, do you have a link for that video?  I am interested.
Logged
AMA 62221

Once, twice, three times a lady.  Four times and she does it for a living.  "You want me on that wall.  You need me on that wall."

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 13755
Re: Sig Weld
« Reply #12 on: February 11, 2014, 07:32:26 PM »
Quote from: Dick Pacini on February 11, 2014, 02:24:03 PM
Brett, do you have a link for that video?  I am interested.

   I posted it here a few months ago: http://stunthanger.com/smf/index.php?topic=31972.msg317971#msg317971

    You will definitely learn something, and bear in mind this was A LONG time ago.

    Brett
Logged

Offline EddyR

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 2561
Re: Sig Weld
« Reply #13 on: February 12, 2014, 11:10:58 AM »
I used a heat gun and removed epoxied motor mounts from a 25 year old model. I ended up pulling the entire plug out of the tank area. The balsa was like new under the epoxie.
Ed
Logged
Locust NC 40 miles from the Huntersville field

Offline 55chevr

  • 2016 supporter
  • Trade Count: (0)
  • Captain
  • *
  • Posts: 742
Re: Sig Weld
« Reply #14 on: February 12, 2014, 01:28:32 PM »
Quote from: EddyR on February 12, 2014, 11:10:58 AM
I used a heat gun and removed epoxied motor mounts from a 25 year old model. I ended up pulling the entire plug out of the tank area. The balsa was like new under the epoxie.
Ed

I like the idea of using a heat gun ... I have a project in mind now.
Logged
Joe Daly

Offline Bill Little

  • 2017
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 12671
  • Second in COMMAND
Re: Sig Weld
« Reply #15 on: February 12, 2014, 04:54:07 PM »
Quote from: Ty Marcucci on February 12, 2014, 12:43:15 PM
In looking at some plans from the early 50's pre epoxie era, several of the plans show the doubler being screwed to the basa with small wood screws. What does that say? They didn't trust glue either LL~ LL~ LL~

Hi Ty,

On the Wicked Witch plans it shows wood screws into the motor mounts, also, IIRC.  Plus a screw or two somewhere around the stab............ yep, no one trusted glue! LL~ LL~

Bill
Logged
Big Bear <><

Aberdeen, NC

James Hylton Motorsports/NASCAR/ARCA

AMA 95351 (got one of my old numbers back! ;D )

Trying to get by

Advertise Here
Pages: [1]   Go Up
« previous next »
Tags:
 


Advertise Here