CA Fillets

[toms]

Hello all I am building an AT Mustang. I talked to AT and they said to use CA for the fin fillets and not to use epoxy as it would be to heavy. In the past when i have used medium CA for fillets it comes out with small lumps, impossible to sand smooth.
Any tips on how to apply smoothly???
Thanks Tom

 

[swimmer]

Been a while since I built my Mustang but I used 15 min. epoxy to fill the junction between the fin and body tube. I really didn't create a fillet. If you apply then smooth the epoxy into the junction you will have a seemless transition. With the fin locked into the fin lock you will not have to use much epoxy to secure them and the weight is basically zilch.

 

[Balsa Bob]

Tom... When you apply the CA do you allow it to seek it's own level or do you attempt to spread it?

 

[KermieD]

If you're looking for a smooth transition from the fins to the BT, you're probably still going to need to use epoxy as there's a lot of space there to try to fill with CA. If you're just looking for structural integrity though, I wouldn't bother. I've always found CA to be more than sufficient on AT kits.

 

[toms]

I apply the medium ca, let it set for a minute or 2 then use a toothpick or a pin and try to let the ca follow the the sharp point.
Thanks Tom

 

[swimmer]

Tom,

Here is a picture of my Mustang fins. You can see the applied epoxy smoothed into the fin-tube joint creates a basicall seemless transition. Primed and painted it came out real nice.

 

[toms]

Very nice We are going to build another AT kit and we will use epoxy.
Thanks for all the input\Tom

 

[Countdown Hobbies]

I used 5 min epoxy on my last kit and it worked good

 

[jraice]

An epoxy fillet might add weight but there is no way a smooth layer will, that is how I would do it, I never worried about the seam on my AT kits, just left it, but a thick epoxy would be the best option...