I am using pivot hinges...should I use expoy, medium or thick CA to glue them in place.

also I have a .15 engine to connect to the mount should I use screws or lock nuts and bolts
(this is to connect the engine to the mount, not the engine mount to the plane)

Epoxy tends to work better on hinges that have a pinned hinge. there are also "CA" hinges designed to work with thin CA (cyanoacrylate). These are fitted into the wood parts dry, then the thin CA is dripped into the very small gap between surfaces. I prefer the CA hinges for any plane under 12 pounds

Most use bolts and nuts to hold the engine to the mount. Vibration here can cause wood screws to come loose. Use the nuts with the plastic inserts that keep them from loosening.

G'day Mate,
1) Epoxy
2) Bolts & lock nuts.

Hinge glue for flat pinned hinges or hinge points. Epoxy OK but not as good.

THIN CA for CA hinges.

Epoxy by all means. Protect the hinge line though or you will turn the hinge into a board. I use dental wax and using an xacto knife and an Alochol lamp, to heat the blade, I apply a very light layer of wax on the hinge line. Do both sides. When you seat the hinges, wipe off any epoxy that ozzes out. Alochol on a paper towel works well for the clean up. I epoxy the hinges in the movable surface first, and then after it is set, then epoxy to the wing, or stablizers. The wax that is left acts like a lube.

Some guys use vasoline on the hinge line, but I like the wax as it is dry and doesn't rub off in handelling.

Don

on hinged pin type i have always had good luck with epoxy and either vasoline or wax as was said here,on larger models i also pin the hinges with a toothpich and wood glue.

nylon filed engine mounts, like the ones included in most ARFs and kits, hold both machine and self tapping screws (wood screws) exceptionally well and are very resistant to loosening from vibration because the nylon taps a very tight fit because of compression, it's the same as having the lock nut previously mentioned, you know the ones with the nylon in the end of them

kc

Use epoxy. CA will set up too quickly to allow time to align the surfaces.

If the mount is a composite, use sheet metal screws with lockwashers under the head. Drill the proper size tap hole and lightly grease the screw before you turn it in the first time. If the mount is metal, drill and tap for the proper size machine screw and again use the lockwasher under the head.

Dr.1

Thanks guys for all your help. I always get great answers here!

I have never used pivot hinges but I have heard that Gorilla glue will hold it in great, and that it expands inside the hinge hole and gives it more holding power. Just be careful how much you put in as too much will expand outside of the hinge hole.