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A Quick and Dirty CA Hinge Installation

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A Quick and Dirty CA Hinge Installation

Post  batjac on Wed Sep 02, 2015 1:42 am

Someone emailed and asked me for some help on CA hinges, so I threw together a little video.  I started on it after bedtime, so I just shot it, cut it, and uploaded it fast without adding any title page or captions.  Gotta get my beauty rest, y’know…



The Dirty Mark
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Re: A Quick and Dirty CA Hinge Installation

Post  akjgardner on Wed Sep 02, 2015 2:20 am

Thanks for that Dirty Mark. I liked the way you bent them in the middle, I am going to start doing it that way
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Re: A Quick and Dirty CA Hinge Installation

Post  rsv1cox on Wed Sep 02, 2015 6:16 am

Well done.

My Camel bought at a flea market has those hinges but are unsecured. I think I will use your system when I get around to finishing it. But, how did you cut the slots?



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Re: A Quick and Dirty CA Hinge Installation

Post  NEW222 on Wed Sep 02, 2015 4:15 pm

Good video. I like the way you pre - work the hinges.
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Re: A Quick and Dirty CA Hinge Installation

Post  RknRusty on Wed Sep 02, 2015 8:59 pm

akjgardner wrote:Thanks for that Dirty Mark. I liked the way you bent them in the middle, I am going to start doing it that way
Ditto that. I've avoided CA hinges like the plague, but I might give them a try now. I think I'll sticky this thread. Ken suggests I use them on the flaps for my current repair. I wish I hadn't already punched holes for stitches. But I may use one at the innermost end of each flap, since there is a wider gap there.
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Cutting hinge slots and beveling

Post  batjac on Thu Sep 03, 2015 9:29 pm

Thanks for the comments, Guys.

To answer how I cut the slots, I went ahead and did a second vid on slotting and beveling.



Here's a link for the Great Planes tool.  The Goldberg tool you'll just have to hope to find on your local hobby shop shelf as NOS.



Hope it helps,
The Dirtier Mark
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Re: A Quick and Dirty CA Hinge Installation

Post  getback on Fri Sep 04, 2015 7:29 am

Thanks Mark , That's the way a friend I was building /flying with years ago had showed me and I had forgot how to wick the CA bend and exercise , after I had heard so many on here say that it would stiffing the hinge unusable . I will have to give this a try again // stitched hinges are nice but ... take time and sometimes I just don't have it for building // we never taped over but did mono-cote yes it was larger RC planes 40 size RC Plane
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Re: A Quick and Dirty CA Hinge Installation

Post  PeterJGregory on Sun Feb 14, 2016 10:20 pm

Good techniques, thanks for the share.
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Re: A Quick and Dirty CA Hinge Installation

Post  roddie on Mon Feb 15, 2016 2:39 pm

Those are cool tools. I cut my 1/2A hinge slots with an X-acto knife too.. and have been using Sig Easy-Hinges. I use the #17 chisel blade and a "step-plate" at the edge of a table-top. The #17 blade is 1/4"w. This photo shows a piece of 1/8" balsa. I find/make a small rectangular step-plate (approx. 1/2" x 2") from 1/16" thickness stock. Could be plywood, plastic/laminate or in my case I had .060" aluminum handy. I place it at the edge of a tabletop with the balsa behind it and sometimes a fence clamped behind the balsa. It gauges to the center perfectly and guides the blade into the edge squarely. The blade is positioned on the step-plate with the ground bevel on it's end, facing up. Working off the edge of a table keeps the knife's collet/handle from contacting the work. I use my left hand to firmly hold the work-piece down.. and my right hand for exerting firm finger-pressure on the blade, which holds it down and keeps it square. A careful rocking/pushing action into the wood takes just seconds to complete. The #17 blade is long-enough to make a deep slot.. and you can mark the blade for depth of cut too. Marking the "up" side of the blade also helps prevent from using the wrong side. You want to see the chisel's bevel facing up.. or else the slot will be off-center.  



For comparison.. the #18 chisel blade is 1/2"w. and fits the larger collets/handles. 1/2" is much wider than I cut my hinges. I typically cut mine 1/4" to 5/16"w. x 1" long and round the edges like Mark does.

I just made this example with the wider #18 blade this morning. It took longer to post one pic than it did to cut three slots. I used a maple strip for a backing-fence.. C-clamped to the tabletop, which helps keep my concentration more on the hand doing the cutting. I had to shim-up my step-plate with tape on the bottom, to equal 1/2 the thickness of this particular piece of balsa stock. It's well worth the effort to make a good set-up. Most often.. a 1/16" thick plate is going to be perfect for 1/8" balsa.




Just another way to do it.. I like Mark's Goldberg tool for tapering. The Dubro hinge-slotting tool can be used to scribe the center of an edge up to 1/2" thick. A thumbtack fits snug in the slot of either of the two slotted attachments.

This qualifies as "quick and dirty" I think.





I've wanted to make a V-angle sanding block for tapering. My thoughts are using two 36" lengths of 3/4" light-gage aluminum angle-stock with abrasive paper on the outside face(s). The pair would fit (angles facing up) into a 36" long groove/slot cut in a board with end-blocks to keep them from sliding. A slot would support the whole length of the angle-stock. The outside of the angles can be shimmed-up with blocks, to establish the taper you desire.
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Re: A Quick and Dirty CA Hinge Installation

Post  fredvon4 on Mon Feb 15, 2016 2:54 pm

Just a note to say....CA hinges are NOT the best way for Control line models as they are way too stiff

I admit I like them for servo controlled surfaces but prefer MUCH loser hinges for CL models....favoring sewn or pre-made barrel hinges... I even make my own barrel hinges frequently from CF rod and CF tube but it is an acquired technique

and the tried and true method of a brass / aluminium tube with piano wire pin works well with zero stiffness

OTOH this set of posts are excellent ways to locate and use the danged things

again not Poo Pooing the methods of using the CA hinges....just that they are usually too stiff for 1/2a use IMO
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Re: A Quick and Dirty CA Hinge Installation

Post  roddie on Mon Feb 15, 2016 6:03 pm

I agree Fred. I used to use the small Dubro pinned-hinges.. but they took a lot of time and care not to break-through a 1/8" thick control surface using their hinge-slotting tool and wood pick. They do however permit the elevator/flap (sans linkage) to deflect downward with gravity alone. A CA hinge is not going to do that. As I mentioned for 1/2A size airplanes.. I cut the CA hinges to about 1/4" width.. and I'm careful not to use more than needed to get the job done. They're QUICK.. when compared to most other methods of hinging. I need all the help I can get when it comes to cutting down on building time! Laughing

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Re: A Quick and Dirty CA Hinge Installation

Post  fredvon4 on Tue Feb 16, 2016 9:07 am

Roddie said "I need all the help I can get when it comes to cutting down on building time! Laughing
"

could not agree more...been working off and on with 5 simultaneous builds since last September and just now starting the covering

My production line method did not work out as planned

I must have missed the cut down to smaller (reading too fast some days.) but I can see where that technique would work fine for many 1/2a models with the CA hinges
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