Monday, April 18, 2022

Quest/Enerjet Big Dog, #Q5010, Build Part 2, Fin & Launch Lug Gluing

The fin marking guide in the instructions sheet didn't meet up when wrapped around the tube.
I have let Quest/Aerotech know and they are  correcting that error.

I went to payloadbay.com and then to "Tools". then "Fin Wrap Tool".
TIP: Even though the Quest website says the outside diameter is 1.97", I found a better fit when I entered 4 fins and 1.98" diameter.
The above picture shows the fins after a CWF fill, then a filler/primer coat and sanding.
Notice that near the the root edge the fin has the filler/primer sanded down to the CWF filler underneath. This gives a stronger bond of the glue fillets.

I had to go back and re-pencil in the alignment lines.

On the right are the four fins in place. 
Note the paper towel stuffed into the rear to keep the paint out.





The 3/16" diameter x 2 1/2" long launch lug is glued onto the body tube between two fins and 10" from the bottom of the tube.

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