News:



  • May 28, 2024, 09:39:50 AM

Login with username, password and session length

Author Topic: Glue Joint (CA) How Much Glue  (Read 1703 times)

Offline Motorman

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 3282
Glue Joint (CA) How Much Glue
« on: August 13, 2015, 07:54:21 PM »
Trying to build lighter and wondering if I'm using too much glue. After you glue a wing, rib to spar, rib to LE and TE what do the glue joints look like? Do you just use a drop of thin CA that disappears into the joint or do you follow with a dab of medium CA and leave a fillet?

Thanks,
MM

Offline Chancey Chorney

  • Trade Count: (0)
  • Captain
  • *****
  • Posts: 621
Re: Glue Joint (CA) How Much Glue
« Reply #1 on: August 13, 2015, 09:33:42 PM »
Myself, I just use thin ca as you described and leave it. This is how I do it and has worked well for me.

Offline Curare

  • 2014 Supporters
  • Trade Count: (0)
  • Captain
  • *
  • Posts: 779
Re: Glue Joint (CA) How Much Glue
« Reply #2 on: August 13, 2015, 09:54:44 PM »
Here's a tip, if you want to save weight, don't use CA, use titebond or some other brand of aliphatic resin.

As it dries it sheds weight, and the dried joint is slightly flexible, meaning that your plane can take a knock or two without breaking.

CA joints are strong, but brittle.
Greg Kowalski
AUS 36694

Offline Motorman

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 3282
Re: Glue Joint (CA) How Much Glue
« Reply #3 on: August 13, 2015, 11:26:59 PM »
I would love to use titebond. How do you apply tiny bits of it? Does it have to be in the joint before assembly? That would mean piece by piece assembly?


MM

Online Brett Buck

  • Trade Count: (0)
  • Admiral
  • ******
  • Posts: 13756
Re: Glue Joint (CA) How Much Glue
« Reply #4 on: August 13, 2015, 11:52:21 PM »
I would love to use titebond. How do you apply tiny bits of it? Does it have to be in the joint before assembly? That would mean piece by piece assembly?

  It definitely needs to be in the joint when assembled, so yes, piece at a time. Use one of those syringe glue guns to apply it.

   CA is not likely to be causing your weight issues. I use medium (which also has to be in the joint during assembly) for almost everything, You just want enough to saturate the joint and cover the entire joint.

   Usually weight issues are caused by using too much plywood, wood too heavy, and *finishing*.

   Brett

Offline Gerald Arana

  • 23 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1537
Re: Glue Joint (CA) How Much Glue
« Reply #5 on: August 14, 2015, 12:08:20 PM »
I would love to use titebond. How do you apply tiny bits of it? Does it have to be in the joint before assembly? That would mean piece by piece assembly?


MM


MM: I use and like Titebond glue. I put plenty (probably to much) on and squash the parts together. Then, and this is the important part, I use a scrape piece of balsa (1/16"-1/8") to remove ALL the squished out excess glue. I cut a length of balsa at a 45 degree, or so, and wipe the joint all around. I leave NO fillet of glue as that is just excess weight.

On end grain, I'll double glue. That is put some glue on and let it almost dry (soak in) and then final glue assembling the parts. If I have to use instant glue, I use it only as pins. (Very small amount)

Good luck, Jerry

Offline Tim Wescott

  • 2016 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 12823
Re: Glue Joint (CA) How Much Glue
« Reply #6 on: August 14, 2015, 12:21:38 PM »
I use a spigot on the end of my glue bottle, or I squeeze out a little pool of glue onto a piece of cardboard or yogurt lid and pick up dots of glue with a wire.

This works for both Titebond and for CA.
AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline Target

  • C/L Addict
  • 2019 supporter
  • Trade Count: (0)
  • Admiral
  • *
  • Posts: 1692
Re: Glue Joint (CA) How Much Glue
« Reply #7 on: August 15, 2015, 10:49:44 PM »
I order small pipettes from Amazon online. I think I got 1,000 for like 8 bucks.
I put a new one on the thin and thick ca bottles at the start of every build session, and toss them after each. Makes a huge difference.
Additionally, I have a cup full of q-tips on the work bench. Any extra glue can be quickly and easily blotted up with the q-tips.
Totally worth the extra minor expense, to me.
Regards,
Chris
AMA 5956


Advertise Here
Tags:
 


Advertise Here