I just purchased a pack of plastic Du bro hinges that have a pin crimped on one end for the pivot. Are these any good? They will be used in CG 300 Extra. I didn't like the plastic ones that came in the CG kit. Will these be any better. I think the Du bro part # is 417

James

These are good. I tend to rough them up and glue them in with 5 minute. I also put vaseline on the hinge line so I dont get glue in them.

You can push that pin into the wood to keep it from coming out, or take it out and use a T pin in the hinge and bend the other end so it doesn't come out. This makes it easy to take the surface off if you need to. You can cut 1/2 of the T off the top by cutting it if you just want to be able to get at it from the bottom and not see it on the top.

Also, a lot of people pin them by drilling a hole in the surface through the hinge and putting a toothpick through it and gluing it in. then sand the toothpick and fill before covering or painting.

Dubro are great hinges. I have used them for forty years of building . The easy way to install them is with Elmers carpenter glue Sand the plastic a little then spread a tiny bit on the hinge let dry some then put glue in slot install hinge hang the surface so any extra gule flows back on the hinge and wood. Any extra glue that leaks out just let dry and then pop off. I have never had a hinge come loose and have a few planes 25+ years flying and still holding.

Thanks Guys.

Just what I wanted to hear!

James

james,

i agree with flyboy i have the h.d. dubro hinges in an areoworks edge 540, good and solid with no flutter. rough them up and wipe clean before installation, i used pacer hinge glue, has a tiny tip so you can inject glue into hinge slot.

Agreed again. I had the Dubro hinges in a 4*-60 that I crashed. The stab and elevator were literally torn to pieces, but the hinges held. The way I do mine is to cover first, then glue the hinges in. I used Pacer hinge glue. Then, from the bottom side, take T-pins and a sidecutters (diagonal pliers, wire cutter, or whatever other term you wish to use for that tool), go to the end of the wing or surface, and hold the T-pin so it will go all but about 1/8" thru the surface. Grip the T-pin flush with the top of the surface with the sidecutters. Then stick it in about 1/4" away from the hinge line thru the wood and the hinge, snip with the sidecutters, and push the end just below the surface. It shouldn't protrude out the top that way. Then secure with a drop of thin CA. When I put the gap sealing strips of covering on, they cover up the pinholes nicely.

Dubro hinges are good. I recommend you use epoxy and pin them in place with toothpicks though.

If you put glue on the hinge, a lot of that glue will wipe off and go into the hinge pin when you insert the hinge. If you put the glue in the slot then that's not a problem.

This is a page about using Robart Hinge Points, but at the end of the page I talk about gluing in hinges.

http://www.airfieldmodels.com/hinge_points.htm