Scavenger! Build Part 17 Fin Gluing

When you thing about it, Through-The-Wall or TTW fins really changed the structure and strength of mid and high power rocketry.
When I started in 1969, all model rocket fins were surface mounted. For low power models it was fine - for the most part.

The Scavenger fins are Basswood. The interior fin tabs lock against the lower thick card stock centering ring on the engine mount. That and gluing to the engine mount tube gives you a very strong fin can "unit".




Initially 15 minute epoxy was mixed up and applied on the root edge of the fin tab.





The fins were inserted into the slots.

With the 15 minute epoxy set time, I was able to come back every few minutes and check the alignment until I was sure the glue had set up and the fins were tight against the body tube. Even with epoxy on just the root edge tab, it's a very strong joint.