The next step was to glue the centering ring into place.

Decisions

I decided to use 30min Epoxy glue from AusRocketry. I didn’t want to go for 5 minute and I didn’t want to for 24 hour.

Preparation

While every effort was made to ensure glue/mess did not make its way on o the surfaces where the Centering Ring is to be glued, some does make its way and so I had to clean it off. There wasn’t much. I used some Methylated spirits to clean the surfaces as well.

Next I wanted to tape up the motor mount exterior, so I would not get any epoxy glue. I also taped up the exterior of the airframe, just to help reduce chance of getting Epoxy on there.

I also decided to stuff some paper up the Motor Mount tube to ensure nothing got up there.

Insert centering ring in ~6mm and mark on the motor mount three places with pencil. This helps us know how far we have to push it in.

Gluing the Centering Ring

This was a carefully thought out job.

1. Internal and External ring is sanded with Grit 60
2. Sand internal/external with Grit 60 sand paper
3. Mix the epoxy resin and hardener
4. Apply some of epoxy to the external surface of the centering ring. Need to be liberal in application, but not so much it drips too much or make a mess.AS YOU DO THE JOB, rotate the rocket so the glue doesn’t drip down to one area of the rocket!

1. Apply liberal amount of epoxy on inside of air-frame (a ring)
2. Apply liberal amount of epoxy on outside of the motor mount (a ring)

Remember, keep rotating the rocket.

1. Slide the centering ring on
2. Double check the depth the centering ring has been push in
3. Remove the wire holding the centering Ring
4. Take the rocket out of the Jig and attach to pole and cable-tie up

Here are some pictures.

 

Never used the Syringe in the end. Used chopstick instead.

Mixing 24 Epoxy.

 

After this I slid the Centering Ring on. This requires two hands, so no photos.

Then I erected the rocket against the workbench, so that Gravity would bring the Epoxy on to the top of the Centering Ring.