Flying Engine Mount Build Part 3, Engine Hook Notch

The lower ring will need a engine hook relief notch.
Use a rotary punch for a sharp cut round end slot.

Knock off the corner ends with a knife.
The inset picture shows the finished notch.

I didn't realize it until after everything was glued up I forgot the launch rod holes! Punch a hole in each ring opposite the engine hook notch. Be sure the rod holes are in line. (See the final build post for location pictures.)




Before gluing up the mount, brush on some medium CA glue around both ends of the engine tube for strength.