Hi,

Im currently building another ARTF, i think i need a bigger house soon as thier taking over !!!!!!!! this hobbys too adictive lol.

Anyway the question is ive been told by someone that when you epoxy the plywood wing joiners in the wing, you should drill small holes, not all the way throu just to indend the plywood as this makes the epoxy take better !!!!!!!!! I havent heard this anywhere else or in the instructions is this a good method ????? If it is how many holes do you recommened etc ? i just thought it might weaken it a bit ...............

Anyway thx for your time and for any help in advance ..........

Sounds like to me that you would be weakening the plywood joiner. If you want to make the glue absorb better into the plywood joiner you can use a woodpecker and poke little tiny holes that don't remove any of the material at all. But, the most important thing to do for strength is to use a slow setting epoxy (30 min or greater) and leave the blasted thing alone for AT LEAST 24 hours after you glue it up. Just because you only have 30 minutes working time, almost all glues need 24 hours to fully cure.

i dont think theres any point , and you might weaken it if you are not very carfeul.

when plywood is manufactured there is a release agent left on the plywood, a light sanding on each face of the joiner will get rid of it and with good epoxy, 30 minute or more, you will have a immovable joint

Don't do it!! A good solid epoxy joint like beardking suggests is the way to go. Drilling holes only will weaken the structure. If done properly, the joint will be fine.

looks like i more or less repeated what beardking said, i was writing my post when he posted his obviously!

i understand why this person said this and if the epoxy fills the holes there is no real strength loss, the problem is gettign the epoxy to fill the spaces you cant see, get to or get glue to after you slide it all to the back.if you are really bent on strength the mix some fiberglass strands into expxy and spread that inside. but its still usless, your gonna snap the wing at the middle of one of the halves before you destroy a properly glued brace. also if you want real strength get the good spoxy the stuff that you mid 4 parts resin to 3/4 parts hardener, this is much stronger and great sruff to glass with also it takes ages to dry so great for seapage