RE: New HOW TO Posted: How to Install Robart Hinge Points  
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RE: New HOW TO Posted: How to Install Robart Hinge Points - 8/9/2005 3:23:13 AM   
Arebeck



Posts: 113
Joined: 11/13/2002
From: Newark, DE, USA
Status: offline 		Does anyone have experience with the hinge pockets? I like the idea of having a removable surface but only if I can control when it is removed!!

Ron

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RE: New HOW TO Posted: How to Install Robart Hinge Po... - 8/19/2005 8:28:13 PM   
c130nut


 

Posts: 307
Joined: 9/9/2003
From: Madison, MS, USA
Status: offline 		I just bought those pockets the other day myself. I am doing my first install of the Robart hinges... and a little iffy on the install, but the model requires it due to the size; I just would not trust the CA on a 10 foot wingspan C-130!
Hinge pocket info anyone?
Bill R.

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RE: New HOW TO Posted: How to Install Robart Hinge Points - 9/3/2005 6:35:08 AM   
horace315



Posts: 668
Joined: 9/23/2003
From: va beach, VA, USA
Status: offline 		robert says not to use ca on their hinges it makes them brittle.

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RE: New HOW TO Posted: How to Install Robart Hinge Points - 10/4/2005 3:49:15 PM   
bear 57


 

Posts: 47
Joined: 8/1/2005
From: Clearwater, BC, CANADA
Status: offline 		Believe it or not, white Carpenters glue works well with Robart hinges. After it dries it is virtually impossible to pull the hinge out without tearing out some of the material. In foam wings I use a 3/8" dowel, drilled for a tight fit for the Robart hinge, white glue it and insert into a predrilled hole in the foam. Any excess glue is simply cleaned off with an exacto knife after it dries. Where water is involved, epoxy will work well. Put some vaseline on the hinge area to keep it flexable and to prevent binding.

There are others systems, but this has worked well for me over the years.

(in reply to horace315)
       Post #: 29

RE: New HOW TO Posted: How to Install Robart Hinge Po... - 10/4/2005 4:39:05 PM   
DocYates



Posts: 2598
Joined: 1/2/2002
From: Killen, AL, USA
Status: offline 		I use these hinges as well. I use a toothpick and spread a thin coat of Vaseline on the hinge knuckle. I then fill the hole with Aeropoxy or Hysol and spread a thin coat on the barbed end. After inserting the hinge point, I make sure it is appropiately positioned and then tape the surface in place. It takes at least 24 hours for a good strong setup, but I assure you they will not fail, or never have on my planes. The Aeropoxy or Hysol is some strong stuff.
Tommy

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RE: New HOW TO Posted: How to Install Robart Hinge Points - 10/18/2005 11:06:50 AM   
Daniel-EL



Posts: 125
Joined: 3/2/2005
From: Maumee, OH, USA
Status: offline
quote:

ORIGINAL: qcrcbill

How about SigBond Aliphatic Resin wood glue for the Robart hinge points? Thank you. Bill



Bill, I think this is what all are referring to when they say simply "wood glue". Should work just fine - I use it. Dan

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       Post #: 31

RE: New HOW TO Posted: How to Install Robart Hinge Po... - 10/18/2005 2:58:11 PM   
BasinBum



Posts: 5717
Joined: 7/24/2002
From: Hawthorne, CA, USA
Status: offline 		The instructions for the SIG Somethin Extra call for Alphatic Resin Glue. So like an obedient modeler I went to the hobby store and bought a $3 /4Oz. bottle to glue the fuselage doublers. Imagine my surprise when I went to squirt it out and discovered it looked and smelled exactly like the yellow carpenters glue in the gallon jug sitting on the shelf behind me! Now whenever someone asks me for some wood glue I always make sure to correct them and point out that they want "Alphatic Resin Glue". Don't even get me started on Cyanoacrylate.

(in reply to Daniel-EL)
       Post #: 32

RE: New HOW TO Posted: How to Install Robart Hinge Points - 10/29/2005 5:31:06 PM   
mani_mustang


 

Posts: 51
Joined: 2/5/2006
From: NagpurMaharashtra,, INDIA
Status: offline 		It is very good technique for builders. Like this video very much.
Manish.

< Message edited by model mfg. -- 10/29/2005 5:32:24 PM >


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RE: New HOW TO Posted: How to Install Robart Hinge Points - 10/30/2005 5:43:34 PM   
RysiuM



Posts: 1300
Joined: 4/22/2003
From: Elk Grove, CA, USA
Status: offline 		I never used Robart hinges yet (always used CA and never had a failure). All the info here is quite educating however there are still not answered questions here:
Has anyone used hinge pockets? How to install them (to make sure the hinges are aligned properly)?

Other unanswered question here was: "How many?".
I'm building 85 span wing for Edge 540, and every aileron is 36 inch long, 4 inch wide. Aileron is 1 inch thick at the hinge line. I planned to use 4 hinges (1 about 2.5 inch from each end and additional two 10 inches apart). Is it enough?

RysiuM

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RE: New HOW TO Posted: How to Install Robart Hinge Po... - 10/31/2005 12:19:36 AM   
pdmarsh



Posts: 318
Joined: 7/13/2002
From: Prior Lake, MN, USA
Status: offline 		I recently had my first experience with Hinge Point hinges. The biggest problem I had was alignment from one control surface to the other. I followed Robart's directions, but still had some stiffness due to misalignment. I discovered my own technique. I mark and drill one control surface first and then insert the hinges (not glued as yet). I draw a horizontal center line on the other surface and then use the hinges themselves, while in the first control surface, to mark the exact location of the mating hole. This worked much better than marking and drilling all holes at the same time.

Paul


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Prior Lake, MN

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RE: New HOW TO Posted: How to Install Robart Hinge Po... - 11/5/2005 9:28:13 PM   
RysiuM



Posts: 1300
Joined: 4/22/2003
From: Elk Grove, CA, USA
Status: offline
quote:

ORIGINAL: pdmarsh
I discovered my own technique.


Thanks Paul, I used your technique, and it works like a charm.

In the meantime I foun the Robart's Hinge Point Drill Jig absolutely useless It centers the hole base on the wing thickness. When the thickness is not changing linear hinges will be not in a straight line. It is much easier to use ruller.
As for drilling there is no way to secure the jig so it doesn't move when drill force is applied. For me, it was just a waste of money.

I have a question tho. I use the biggest one. My TE is 3/8 thick, so I added a balsa block inside the wing to have 1-1/4 'meat' for the hinge to stick to. It is only balsa so I'm affraid it will be not strong much. Can I pour thin CA inside the hole before I glue hinge with the wood glue? I don't mean to use CA to glue hinges, just to harden the surrounding balsa.

RysiuM

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RE: New HOW TO Posted: How to Install Robart Hinge Po... - 11/6/2005 4:28:34 PM   
pdmarsh



Posts: 318
Joined: 7/13/2002
From: Prior Lake, MN, USA
Status: offline
quote:

ORIGINAL: RysiuM
Can I pour thin CA inside the hole before I glue hinge with the wood glue? I don't mean to use CA to glue hinges, just to harden the surrounding balsa.

RysiuM


Hi RysiuM,

I'm not an expert builder, so I hope I'm giving good advice here. Personally, I wouldn't pre-coat the hole with CA. I think you'll want the glue that you use to secure the hinge to penetrate the surrounding balsa. The CA might prevent that from happening.

Paul


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Paul Marsh
Prior Lake, MN

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RE: New HOW TO Posted: How to Install Robart Hinge Po... - 4/20/2006 8:22:54 AM   
SMUGator



Posts: 1340
Joined: 10/28/2003
From: Sammamish, WA, USA
Status: offline 		The tutorial is good as far as it goes. In my opinion, the title should be changed to "How to Glue Robart Hinge Points." There is no coverage of considerations for different types of control surfaces, drilling jigs and hole alignment, etc. I love the product, but this tutorial has limited value for anyone who has progressed beyond the application for a basic trainer or ARF.

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RE: New HOW TO Posted: How to Install Robart Hinge Points - 6/7/2006 3:21:36 PM   
Whistling Death


 

Posts: 969
Joined: 3/1/2006
From: Alexander City, AL, USA
Status: offline 		Pretty much anything is better than urethane glue. That would be my last choice as a hinge glue. Yes it holds well but so does everything else. Who wants to have to keep coming back over and over to keep wiping out the access glue, due to the expansion. With other glues there isn't worry that the hinge will be pushed out by the expanding urethane. I have professional experience with these glues and urethane is great glue but I personally don't care to use it on hinges.

As far as putting CA in the hole before gluing. As stated before CA will seal the fibers of the wood up so the glue you are going to use can't soak into the wood. Really the only time I can think that you need to " harden " a hole is when you are going to put screws in a soft wood, as they might pull out under pressure. This is the only real for hardening holes. The glue you use to put the hinges in with will harden the holes sufficiently.

< Message edited by BBOwen -- 6/7/2006 3:31:07 PM >


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RE: New HOW TO Posted: How to Install Robart Hinge Points - 6/7/2006 7:41:17 PM   
RysiuM



Posts: 1300
Joined: 4/22/2003
From: Elk Grove, CA, USA
Status: offline
quote:

ORIGINAL: BBOwen
Who wants to have to keep coming back over and over to keep wiping out the access glue, due to the expansion.


It's been a while since I asked the questions. Now I'm a little older by experience of using these hinges. After I got some experience and learned how to install them, they are my favorite hinges ever

I uses poliurethane with great success and I had no problem with hinges pushed out or leaking the foam while curing. That's how I do it now:

1. I mark the center line on the TE of the hinged wing. I don't use any jig as it doesn't work well , Just measure the center point on bothe ends and use metal ruler to draw the straight line.

2. Then I mark the places where the hinge should be on thet line (I know that before because I have already prepared balsa blocks on the TE for the hinge support ).

3. I drill holes for hinges. Now the tricky part is to drill them straight, means square to the TE. Because I don't have a press drill big enough to put a wing in there I start with small 1/16 drill mounted on Dremell, then I go to bigger and bigger. The last dril size I use on slow speed drill so the hinge goes there very tight

4. I made a sharp tip nylon screw that has diameter of the hinge. The sharp tip shows very precise the center of the hole and marks a spot on the LE of the control surface. So I insert this screw into the first hinge hole exposing a sharp tip just a bit. Then I fit the control surface to the wing and when it is where it shoud be, I press it to the TE of the wing, so sharp point of the screw marks the spot on the LE of the control surface.

5. Now I drill the hole in that spot for the first hinge. Again I use step up drill sizes and the final drill is used on very low speed, so the fit is very tight.

6. I remove the sharp point screw from the first hole and move it to the last hole in the wing's TE. Then I insert Robart hinge in the first hole (in the wing and control surface) and try fit the control surface. Of course it is perfect aligned

7. I align the other end of the contro surface with the wing and when everything is OK I press it to mark the spot by exposed sharp tip of the nylon screw.

8. Remove the surface from the wing (the first hinge) and drill the hole in the marked spot for the last hinge.

9. Now I replace the screw with the second Robart hinge and move the screw to other holes in the wing.

10 Again assembly the wing-control surface and press to mark the next hinge spot. Repeat it for all hinges in the surface every time adding one hinge at the time to new drilled hole.

It looks like a lot of work, but in fact it is not, and with all the tools already on hand and a little experience with drilling holes square to the LE/TE I put 4 hinges in the wing in less than 15 minutes. No binding at all.

Because my holes are very precise and hinges fit very tight in there there is no way the e