Pietenpol-List: CA glues

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CA glues

Post by matronics »

Original Posted By: Greg Yotz
Subject: CA glues I've been watching the conversations here for a while as I have beenconsidering a Piet myself. Todd Chisum's comment about CA(cyanoacrylate) superglues caught my eye and needs a reply. I've beenusing CA glues to build model airplanes for 14 years. They work great onbalsa wood and plastics but are sometimes a little iffy on bass wood orthe spruce I uses in my models. I suspect that the same would be true onthe sitka spruce in full scale aircraft. I have noticed that it doesn'talways "kickoff" or catalyze consistently. Sometimes these instant gluesdon't seem to set up well. The articles that I have read in the RCmagazines seem to indicate that this has to do with the alkalinity ofthe wood and the humidity. There are a lot of handy varieties of CAglues (various viscosities ect) but I would stick with the glues such asT-88 or others. CA glues also have very very noxious fumes. If you weregoing to use enough to build an airplane you would need a respirator.Ihave read of moderlers developing severe allergies to CA's at least assevere as those that some people have to the resins used in fiberglassaircraft. I seem to remember that Rutan used some CA's on hisround-the-world plane but that was a composite aircraft. A little longwinded for my first message here but I hope it is helpful Matt Kirk________________________________________________________________________________
matronics
Posts: 81779
Joined: Sat Mar 18, 2017 8:29 am

CA glues

Post by matronics »

Original Posted By: Todd Chisum
Subject: CA glues I've been watching the conversations here for a while as I have beenconsidering a Piet myself. Todd Chisum's comment about CA(cyanoacrylate) superglues caught my eye and needs a reply. I've beenusing CA glues to build model airplanes for 14 years. They work great onbalsa wood and plastics but are sometimes a little iffy on bass wood orthe spruce I uses in my models. I suspect that the same would be true onthe sitka spruce in full scale aircraft. I have noticed that it doesn'talways "kickoff" or catalyze consistently. Sometimes these instant gluesdon't seem to set up well. The articles that I have read in the RCmagazines seem to indicate that this has to do with the alkalinity ofthe wood and the humidity. There are a lot of handy varieties of CAglues (various viscosities ect) but I would stick with the glues such asT-88 or others. CA glues also have very very noxious fumes. If you weregoing to use enough to build an airplane you would need a respirator.Ihave read of moderlers developing severe allergies to CA's at least assevere as those that some people have to the resins used in fiberglassaircraft. I seem to remember that Rutan used some CA's on hisround-the-world plane but that was a composite aircraft. A little longwinded for my first message here but I hope it is helpful Matt Kirk________________________________________________________________________________
matronics
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Joined: Sat Mar 18, 2017 8:29 am

Pietenpol-List: Re: CA glues

Post by matronics »

Original Posted By: Matt Kirk
I'm with Matt Kirk on CA for home builts. I have used a lot of it overthe years as a RC modeler. It has several advantages and dis-advantages. In big scale models we never trust CA to holdanything that will be subjected to heavy vibration, fike firewalls (I now use T-88). We also don't use it on primary structuraljoints like spars and tail attachments. I don't have any scientific infoto pass along but I have always fealt that CA is somewhat brittle. Iwould never trust my back-side to it!-----Original Message-----
matronics
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Pietenpol-List: Re: CA glues

Post by matronics »

Original Posted By:> Matt Kirk
Thanks for the input on using CA in homebuilts. Your experiences with CA are similar to mine in R/C models. I tried it on one nose rib for my Cuby but found unless the joint was PERFECT there were little gaps that moisture could find its way into. I sealed the edges with resorcinol. The use by others of Titebond II is interesting. I'll try that on my next nose rib.Todd Chisum>I'm with Matt Kirk on CA for home builts. I have used a lot of it over the >years as a RC modeler. It has several advantages> and dis-advantages. In big scale models we never trust CA to hold >anything that will be subjected to heavy vibration, fike fire>walls (I now use T-88). We also don't use it on primary structural joints >like spars and tail attachments. I don't have any scientific info to pass >along but I have always fealt that CA is somewhat brittle. I would never >trust my back-side to it!>-----Original Message-----
matronics
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Joined: Sat Mar 18, 2017 8:29 am

Pietenpol-List: CA glues

Post by matronics »

Original Posted By: vistin(at)juno.com
I've been watching the conversations here for a while as I have beenconsidering a Piet myself. Todd Chisum's comment about CA(cyanoacrylate) superglues caught my eye and needs a reply. I've beenusing CA glues to build model airplanes for 14 years. They work great onbalsa wood and plastics but are sometimes a little iffy on bass wood orthe spruce I uses in my models. I suspect that the same would be true onthe sitka spruce in full scale aircraft. I have noticed that it doesn'talways "kickoff" or catalyze consistently. Sometimes these instant gluesdon't seem to set up well. The articles that I have read in the RCmagazines seem to indicate that this has to do with the alkalinity ofthe wood and the humidity. There are a lot of handy varieties of CAglues (various viscosities ect) but I would stick with the glues such asT-88 or others. CA glues also have very very noxious fumes. If you weregoing to use enough to build an airplane you would need a respirator.Ihave read of moderlers developing severe allergies to CA's at least assevere as those that some people have to the resins used in fiberglassaircraft. I seem to remember that Rutan used some CA's on hisround-the-world plane but that was a composite aircraft. A little longwinded for my first message here but I hope it is helpfulMatt KirkI've been watching the conversationshere for awhile as I have been considering a Piet myself. Todd Chisum's commentabout CA(cyanoacrylate) superglues caught my eye and needs a reply. I've beenusing CAglues to build model airplanes for 14 years. They work great on balsawood andplastics but are sometimes a little iffy on bass wood or the spruce Iuses in mymodels. I suspect that the same would be true on the sitka spruce infull scaleaircraft. I have noticed that it doesn't always kickoff orcatalyzeconsistently. Sometimes these instant glues don't seem to set up well.Thearticles that I have read in the RC magazines seem to indicate that thishas todo with the alkalinity of the wood and the humidity. There are a lot ofhandyvarieties of CA glues (various viscosities ect) but I would stick withthe gluessuch as T-88 or others. CA glues also have very very noxious fumes. Ifyou weregoing to use enough to build an airplane you would need a respirator.Ihave readof moderlers developing severe allergies to CA's at least as severe asthosethat some people have to the resins used in fiberglass aircraft. I seemtoremember that Rutan used some CA's on his round-the-world plane but thatwas acomposite aircraft. A little long winded for my first message here but Ihope itis helpfulMatt Kirk________________________________________________________________________________
matronics
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Joined: Sat Mar 18, 2017 8:29 am

Pietenpol-List: Re: CA glues

Post by matronics »

Original Posted By: Matt Kirk
Matt; I have tried some of this too but ALWAYS come back to T-88 due to it'sversility and ease of use. CA's do have their limits, something to dowith molecular intra-facial tension....something. I got crosseyedlistening to all that as well as smelling it. I stick with T-88 or ahigh quality Marine adhesive in a pinch. T-88 is just so easy, FORGIVINGand cut and dried The "structural gap filling" qualities is a good buttsaver. I have played with spruce pieces with a glue-gap of 1/4". Eachcase, when totally dried, the wood still let go first. That is to sayyou don't do that with airframe parts, just a confidence building test.TO THE LIST IN GENERAL: Ref Resorcinal, where did youse guys read/SEE or hear that this was an"FAA APPROVED ADHESIVE" ?? The key words here are "approved". Inquiringmind wants to know....!Earl MyersALSO; If any of you have any AN/MS hardware questions, I may be able tohelp as I was in that business for a number of years (12).......manufacturing and distribution.Earl Myers -----Original Message-----
matronics
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Joined: Sat Mar 18, 2017 8:29 am

Pietenpol-List: Re: CA glues

Post by matronics »

Original Posted By: Ken Beanlands
Hi Matt: Look into West systems glue. T-88 is real good and popular, BUT, some of the Broadhead fellas into'd me to West and the rest is becoming history er my story. Ryder________________________________________________________________________________
matronics
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> CA glues

Post by matronics »

Original Posted By: Plane Fun
> Subject: CA glues>>> I've been watching the conversations here for a while as I have been >considering a Piet myself. Todd Chisum's comment about CA (cyanoacrylate) >superglues caught my eye and needs a reply. I've been using CA glues to >build model airplanes for 14 years. They work great on balsa wood and >plastics but are sometimes a little iffy on bass wood or the spruce I uses >in my models. I suspect that the same would be true on the sitka spruce in >full scale aircraft. I have noticed that it doesn't always "kickoff" or >catalyze consistently. Sometimes these instant glues don't seem to set up >well. The articles that I have read in the RC magazines seem to indicate >that this has to do with the alkalinity of the wood and the humidity. There >are a lot of handy varieties of CA glues (various viscosities ect) but I >would stick with the glues such as T-88 or others. CA glues also have very >very noxious fumes. If you were going to use enough to build an airplane >you would need a respirator.I have read of moderlers developing severe >allergies to CA's at least as severe as those that some people have to the >resins used in fiberglass aircraft. I seem to remember that Rutan used some >CA's on his round-the-world plane but that was a composite aircraft. A >little long winded for my first message here but I hope it is helpful> Matt Kirk________________________________________________________________________________
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