First Fin
I scuffed up the tab and the root edge of the first fin with 110 grit paper, to hopefully give the epoxy something to grab.
Then I applied my BSI 15 minute epoxy (carefully!) into the slot, both on the motor mount and the sides. Then added another bead onto the fin root edge, and in it goes. Went cleanly, but then I decided that I could possibly get a wee bit of epoxy into the gaps around the edge of the fin, which caused a tiny bit to get a bit higher on the fin, and *then* I thought I could just clean it off with some alcohol... that did not work, and I ended up smearing the bottom of the fin. We'll see, maybe some additional Future will clear it up later. No biggie. On the other fins I will *not* attempt to fill the gaps with epoxy; rather, I will apply a bead of medium CA, which is what I had intended to do in the first place.
No jig used here, the fin only goes into the very tight slot one way, and that is *straight*.
This pic gives an idea what it'll look like (and if you zoom in you can see the mess near the base of the fin.)
Given my inability apply a proper fillet either inside or out, I do wonder how strong the fins will be. Fortunately, being so far from the rear, they shouldn't absorb too much landing impact.
One down, two to go.
I scuffed up the tab and the root edge of the first fin with 110 grit paper, to hopefully give the epoxy something to grab.
Then I applied my BSI 15 minute epoxy (carefully!) into the slot, both on the motor mount and the sides. Then added another bead onto the fin root edge, and in it goes. Went cleanly, but then I decided that I could possibly get a wee bit of epoxy into the gaps around the edge of the fin, which caused a tiny bit to get a bit higher on the fin, and *then* I thought I could just clean it off with some alcohol... that did not work, and I ended up smearing the bottom of the fin. We'll see, maybe some additional Future will clear it up later. No biggie. On the other fins I will *not* attempt to fill the gaps with epoxy; rather, I will apply a bead of medium CA, which is what I had intended to do in the first place.
No jig used here, the fin only goes into the very tight slot one way, and that is *straight*.
This pic gives an idea what it'll look like (and if you zoom in you can see the mess near the base of the fin.)
Given my inability apply a proper fillet either inside or out, I do wonder how strong the fins will be. Fortunately, being so far from the rear, they shouldn't absorb too much landing impact.
One down, two to go.