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Old 10-13-2019, 01:33 PM
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Quote:
Originally Posted by kork View Post
Brass tube and then re plug with 3/16 round balsa and redrill with jig. Seriously a 1 hour job.
Covering doesn't get wrecked either.

Hoistguy, bring it over I will do for you.
I just might give you a call
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Old 10-14-2019, 03:40 PM
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Originally Posted by pawnshopmike View Post
I've used the solder iron trick more times than I can count. Works awesome and never an issue.
Any tips or tricks?
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Old 10-15-2019, 08:30 AM
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Problems with the soldering iron method:
- Fumes (toxic?)

- The end of the hinge protruding inside past the wood generally falls into the structure, transforming the wing/aileron/stab/etc into rattle toys...
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Old 10-15-2019, 08:44 AM
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I'm not concerned with fumes however losing the piece inside the surface is an issue. I'm replacing a fuselage so I will try both methods on the junk parts before attempting on the rudder. Too bad Robart doesn't make a slightly oversize hinge point to compensate for the larger hole.
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Old 10-16-2019, 05:04 AM
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Quote:
Originally Posted by Muttdog View Post
I'm not concerned with fumes however losing the piece inside the surface is an issue. I'm replacing a fuselage so I will try both methods on the junk parts before attempting on the rudder. Too bad Robart doesn't make a slightly oversize hinge point to compensate for the larger hole.
What about using a flat hinge instead?
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Old 10-16-2019, 05:36 AM
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Quote:
Originally Posted by jamesrxx951 View Post
What about using a flat hinge instead?
I guess that's an option but most likely 1 of the 2 methods laid out in this thread will be my pick
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Old 10-16-2019, 06:36 AM
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Next time I need to replace a robart style hinge I'm going to try the method in the PAU video.
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Old 10-16-2019, 07:45 PM
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I use the soldering iron method and works like a champ. Very easy to do .---Smitty
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Old 10-16-2019, 09:06 PM
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Quote:
Originally Posted by Muttdog View Post
Any tips or tricks?
When getting near to the end of the hinge with the iron, Iíve had some success with grabbing the remaining plastic with tweezers, forceps or even a wood screw and dragging it out to prevent it from falling inside. And even the tidbits that do fall inside usually donít cause a problem.
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Old 10-16-2019, 09:41 PM
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This is how I remove broken Robart style hinge. Made a video. Done outside on a breezy day to cut down on fumes. And please note the cartridge air mask. I hope this link works
Dave
Removing Robart hinges (2 min 13 sec)
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Old 10-18-2019, 03:37 PM
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Good stuff here guys, the vid was great. I'm going to try melting it out first.
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Old 10-18-2019, 04:24 PM
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The melting method works,but you are left with melted plastic stuck to the wood.Once again you left scratching your head how to clean a dirty hole with out making it bigger.
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Old 10-22-2019, 02:04 PM
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I would cut the hinges and drill new holes personally. Less mess and more likely to get a solid bond into clean wood.

Drilling the new holes straight should not be an issue if you are using the Robart hinge jig.

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Old 10-27-2019, 12:05 PM
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Job came out great! Thanks to everyone who contributed, I took a little bit from you all. Here's how I did it:


IMO melting them out is the best best. No worrying about centering and it doesn't matter how gnarled the top of the hinge stem looks.



After melting through I used a drill bit the size of the hinge point to clean out the hole, but first I heated the bit in a torch for 5 seconds. The hot bit loosened any remaining plastic and the flutes pulled it out of the hole. After this, a larger hole was drilled to accommodate the balsa dowels.



Next was to take an aluminum tube, drill the ID to the size of plugs and carve some teeth in it. A piece of 1/2" square balsa was mounted in a drill press and the tool lined up. After it was in line I pulled the tool out of the chuck and inserted a drill bit to provide a pilot hole for the hinge point. After the pilot hole, the boring tool was re-installed and the dowels were cut out of square stock.




The dowels were just a touch tight so each one was chucked in a drill and hand sanded to fit each hole.



Finally a little gorilla glue and it's ready to drill for the new hinge.

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Old 10-27-2019, 12:52 PM
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My method of warming the glue allowing the hinge pin to be removed results in a ready use hole for the hinge pin. No need to plug and re-drill the hole. Hopefully you will never need to remove hinge pins again but if you do give my method a try.
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