krs

Does anyone know wher I can find an article on how to install "threaded hinges"
Thanks.

rajul

My Feedback: (58)

Hi krs, are you referring to pinned hinges or robart hinges?

Tall Paul

Figure 8 hinges?
I use those a lot.

krs

Yep, figure eight is what I am looking for. I saw an article long ago on this style, but I
cannot find the magazine it was in.

Jim Thomerson

Here you go. http://www.iroquois.free-online.co.uk/knot.htm

Scroll sown to close sewn hinge. I use this kind made out of dental floss. I have never had one fail.

Tall Paul

I use the figure-8 a lot when a full-length MonoKote hinge begins to rip along the hinge at either end.
It's a handy field repair also.

krs

Thanks Jim....!!!!!!!

SMUGator

The "close sewn" hinge looks pretty interesting for small planes, but the drawing on the link left a bit to be desired. Does anyone have a better illustration of the wrap pattern?

Tom

Jim Thomerson

The close sewn hinge is a figure 8 hinge laterally compressed. You make slits in the stab and elevator, also notch the leading edge of the elevator to clear the hinge at the centerline. Do put clamps on the pieces to hold them in place, or you can pull them out of line while sewing. I use dental floss and a needle to sew with. I start by poking the needle through one slit and running it back through the centerline and through the tied end of the dental floss loop. I pull it tight and put a tiny drop of CA on the floss to hold it in place, and then cut the loop knot off. Then sew away in a figure 8 fashion with the crossover at the hinge centerline. Be neat, pull everything tight, and, when finished, use a drop of CA to fix the end, then cut off the excess. I generally fill the slits with Sigment. I've used these hinges on up to 40 size CL airplanes and never had a failure. If one starts to fail, you could see it, I suppose, and replace it.

SMUGator

That's great, Jim. Thanks. I appreciate you keeping "old school" techniques alive like this one and your contributions on silk and dope.

Tom

Cross Check

Hi All,

I find Figure 8 sewn hinges light, very flexible, easy to do and cheap.

I made a template to space 5 holes about 3/32 apart. I drill through with a 1/32 bit in a hand mandrel.(10 holes per hinge)

I use polyester thread. I cut off 2ft. or so and tape it to the bench with the end of the thread hanging over. I put a clothespeg on the end to make it hang down straight. I then coat the thread 2-3in. above the peg with CA. This makes 'a needle' from the thread which works great. It is easier than threading a needle.

I double hinge the area where the control horn is.

Much easier and faster than slotted hinges for me. I like the 'old school' look.

Take care,
Have fun,
Dave'crosscheck'Fallowfield
Maac 6437
Unabashed Combat Team