I'm building a PML X-caliber and ran out of epoxy while doing fin fillets.
The X-calber has 6 fins, and each fin has 6 locations for fillets (each side
of fin on outside of body tube, inside of body tube, and at motor mount
so there are 36 fillets in all. The interior fillets are particular
challenging since there is only about 1/8 inch gap between inner wall of the
body tube and the outside of the motor mount, and the root edge of the large
fins is at least 9" long.
So I was out of epoxy but I had to go to the market anyway, so I picked up a
package of 30 minute two-part epoxy in the hardware aisle. I then happily
went back to putting fillets on the fins. I did 6 of the 36 fillets with
new epoxy, then a set it aside to cure. The next evening I was going to do
some more fillets and I checked the ones that I had done before. They
hard when I touched them, but when I pressed down with my finger I stuck a
little to the epoxy and left a fingerprint in it. I've waited a couple more
days, but it's still the same -- hard, but slightly tacky. Now what do I
I don't think I can remove the epoxy, especially from the interior fillets,
I would do that. Would spreading just the epoxy hardener on the surface of
the exterior fillets help any? Should I go over the fillets with better
quality epoxy that I trust to harden? or would the soft epoxy underneath
"infect" the top epoxy with the same disease?
I was really looking forward to flying this rocket, and this whole glue mess
has somewhat damped my e***ment. I'm dead in the water until I can get
this. I would appreciate any helpful advice.