Robart Hinges on Extra
 

I'm gonna replace the CA hinges on the GP Extra for Robart hinges. I don't know if I should go for 1/8" or 3/16". The Leading edge of the elevator and rudder control surfaces which are the ones who mate with the main surface are 5/16" thick. The leading edge of each aileron is 3/8". I'm concerned both with the thickness of the hinges as with the length.

These hinges come in another format which is 1/2A which seem to be shorter and could be a better fit for the ailerons.

Of you people out there who have used Robart hinges, are there any suggestions?

3/16"
http://www2.gpmd.com/image/r/robq2510.jpg


1/8"
http://www2.gpmd.com/image/r/robq2508.jpg


1/2A
http://www2.gpmd.com/image/r/robq2506.jpg

RE: Robart Hinges on Extra
 

the 1/8 " should be fine.

RE: Robart Hinges on Extra
 

I've used'em, and the 1/8" will do just fine. Space then about 3" apart.

Dr.1

RE: Robart Hinges on Extra
 

In theory shouldn't I put them where the CA ones where originally intended to be?

RE: Robart Hinges on Extra
 

http://www.robart.com/how_to/hinge_points.aspx

Use the size that fits best but remember that as stated in step 5 of the instructions above "you can trim the length down" if needed.

DON"T use CA, Hinge glue would be best or polyuerethane (sp).

RE: Robart Hinges on Extra
 

Is the robart drill jig for these hinges useful? I think I can handle the drilling but as I don't have a drill press, I don't know how to get straight perpendicular penetration to obtain perfectly aligned hinges.

RE: Robart Hinges on Extra
 

IMHO the drill jig makes a huge difference in getting the job done right. While it's possible to do it without the jig, it's much easier to do with it. In fact, I think it's next to impossible to do it wrong with the jig. Without the jig it's very very hard to get it right.

Ken

RE: Robart Hinges on Extra
 

Ken, using the Jig properly will always result in perpendicular aligned hinges? If so, then its a must get.

RE: Robart Hinges on Extra
 

You can buy your initial hinges in a combo pack that will include the proper tool
http://www2.towerhobbies.com/cgi-bin...&I=LXADE6&P=SM

RE: Robart Hinges on Extra
 

the robart jig I have will just center the hinge on the piece being hinged up to you to drill the hole perpindicular.I took a 3 ft long piece of mdf. 4"wide added a 1"high fench on one edge then used a square to draw some perpindicular lines from the fence.for strip type surfaces I place the te up tight against the fench put the jig on where I want the hinge and using the drawn lines as a reference drill the hole.

RE: Robart Hinges on Extra
 

my jig is over 20 years old and after looking at the new one it has bushings to keep the drill perpindicular,looks like I may have to buy a new jig.

RE: Robart Hinges on Extra
 

Yeah, my original had plastic guides and they did tend to wear fast. On the other hand, they were cheap to replace too.