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CA Style hinges - 2/25/2002 10:14:44 PM   
Shortman



Posts: 5971
Joined: 2/25/2002
From: Clovis, CA, USA
Status: offline 		I know a few people here have built planes using ca style hinges, how do u like them??? I hear they are fine for a while but then they start to flutter? I am thinking of putting GP hinges on, there much stonger and seem to withstand more.


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Steven Carroll
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CA Style hinges - 2/25/2002 10:47:58 PM   
SMALLFLY-



Posts: 2151
Joined: 12/9/2001
From: Evansville, IN, USA
Status: offline 		I like the ohio superstar 10-30 lb ca hinge or the radio city(blue) ca hinge. no failures with these so far. i have seen the sig and gp ca hingles split many times on others airplanes.

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CA Style hinges - 2/26/2002 1:20:06 AM   
Scorpionjack



Posts: 656
Joined: 12/3/2001
From: Minot, ND, USA
Status: offline 		I've never had a failure, and never had flutter due to CA Hinges. But then again I seal the hinge lines. See the Article I wrote awhile back.

http://www.rcuniverse.com/forum/tm.asp?m=56784]

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CA Style hinges - 2/26/2002 5:57:42 AM   
Shortman



Posts: 5971
Joined: 2/25/2002
From: Clovis, CA, USA
Status: offline 		yeah one problem though, i already covered the whole plane. so i don' think thats gonna work. oh and one more question on the sigSE how many hinges should i make for all the surfaces


rudder

elevator

aielerons


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Steven Carroll
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CA Style hinges - 2/26/2002 7:12:59 AM   
Chris 540



Posts: 1058
Joined: 12/3/2001
From: hampden, ME, USA
Status: offline 		On my 4* I had 5 or so of the Sig easy hinges tear...

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CA Style hinges - 2/26/2002 7:19:56 AM   
Scorpionjack



Posts: 656
Joined: 12/3/2001
From: Minot, ND, USA
Status: offline 		Shortman it will still work with clear Ultracoat, but anyhow Hinges:

Rudder: no less than 4
Elevator: no less than 3 per side
Aileron's: 5 per side

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CA Style hinges - 2/26/2002 8:58:40 AM   
Shortman



Posts: 5971
Joined: 2/25/2002
From: Clovis, CA, USA
Status: offline 		yeah thats what i was thinking... darn thats a lot


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Steven Carroll
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CA Style hinges - 3/13/2002 11:01:00 AM   
Tired Old Man


 

Posts: 12030
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Hi Shortman
I've been building and flying for over 30 years now, and one of the best of those days was when CA hinges were invented. I whole heartedly agree with the quantities that Scorpionjack gave you for the flight surfaces. Don,t let the hinge gap get real wide between surfaces, that's what will usually cause any flutter.

In my personal opinion, stay away from the Great Planes CA hinges. They cut out an oval in the center of the hinge. I guess they think it makes the CA flow better. My experience is it just weakens the hinge by removing needed material. For more complete wicking of the CA into the balsa, drill a 1/16" hole at the center of each hinge slot and chase the slot with a knife blade after drilling to clean up the slot. Don't let any extra CA run down the hinge line and dry, glueing the surfaces together. Keep a paper towel handy to immediately wipe away any excess glue as you go.
Acetone will generally clean up CA, but will sometimes mar Ultracote. It does't seem to effect Monocote, though. If you get a white flash deposit after cleaning up CA with acetone, follow up with a paper towel and alcohol. It usually works.

Silversurfer

< Message edited by silversurfer -- Mar 13 2002 6:07AM >

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No more CA hinges for me - 3/13/2002 11:17:49 AM   
exocet-RCU


 

Posts: 129
Joined: 1/17/2002
From: Shakopee, MN, USA
Status: offline 		I have not had the best of luck with Ca hinges, no matter which brand I bought. They seem to stiffen up on the hinge line, requiring more power from my servos to move the surface. I have also had them pull out of an ARF and split on another kit. I recently found a pretty good way of installing regular hinges using a utility knife. Also ,if you oil the actual moving part of the hinge just enough to keep the epoxy from hardening there, you get nice, smooth hinges. Really, though, my favorite hinges are the Robart PinPoint(actual name?) hinges. Just drill a hole, insert epoxy into the hole and put some on the hinge then stick it in. Easy strong and DONE.

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CA Style hinges - 3/13/2002 7:29:55 PM   
PieGuy-RCU


 

Posts: 43
Joined: 2/14/2002
From: Lakewood, Colorado
Status: offline 		I just had 2 of 4 Robart hinges round out their holes and almost lost the plane. I went with ca hinges and will see how that works. No one at the feild had seen Robarts do this.

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CA Style hinges - 3/16/2002 6:41:49 AM   
Tired Old Man


 

Posts: 12030
Joined: 2/25/2002
From: Central, CA, USA
Status: offline 		Exocet:
Sorry you have had such bad luck so far with CA hinges. When I first started using them i was having similar problems. I found that if I used less Ca when installing the hinge, I had a lot better results. I was really saturating the hinge material, causing a CA build up that significantly stiffened up the hinge material. Now I use just a couple of drops of the thin stuff on each side of the hinge, then dap any excess off immediately.
Good Flying,
Silversurfer

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CA Style hinges - 3/16/2002 11:49:59 AM   
Hisham



Posts: 870
Joined: 2/13/2002
From: Beirut, LEBANON
Status: offline 		Guess Ca hinges are good for models of .40 size and less!!!
I've seen one 1/3 scale ARF model with CA hinges a bit risky
I guess....! Larger models need stiffer hinges!
I agree with Scorpionjack for the number per surface!

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CA Style hinges - 3/16/2002 12:12:48 PM   
Scorpionjack



Posts: 656
Joined: 12/3/2001
From: Minot, ND, USA
Status: offline 		exocet;
Did you look at this post?
http://www.rcuniverse.com/forum/tm.asp?m=56784

If your servo's aren't that strong and your worried about CA build-up on the hinge when installing. Take a Crayon and draw a centerline on both sides so the CA doesn't adhere to the hinge-line..

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CA Style hinges - 3/17/2002 6:08:17 AM   
BigBird1



Posts: 759
Joined: 2/26/2002
From: Knoxville, TN, USA
Status: offline 		Once upon a time I built a 1/4 scale Cub that was ment for a 90/120....didn't like it after I finished it....(I used the GP ca hinges for large planes but turned them sideways to where the wide part was running with the trailing edge) Any ways back to the story....The Enya 120 that I sold it with wasn't strong enough for the guy..so he puts a Sato 150 up front and regulary beats the snot out of it..(hover, flat spins, inverted flat spins, all the good stuff that the model wasn't designed to do...)

Not a hinge has come loose or split...in over a year and a half..

Just 2 cents worth..

< Message edited by BigBird1 -- Mar 17 2002 1:45PM >

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CA Style hinges - 3/17/2002 7:31:55 AM   
A10FLYR



Posts: 1303
Joined: 12/6/2001
From: Littleton, CO,
Status: online 		The 50 pound twin turbine A-10 in my avitar has Sig Easy hinges on all serfaces and all servo's are 135 oz. 9204's. Burned out most of the 70 oz servo's that were in the plane when it was powered by ducted fans. Plane was built in '94 and still flies regularly.

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A10FLYR

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