Sunday, April 27, 2025

New Way Letter - Go Build, Part 5, Engine Mount Gluing

Run the Kevlar line out the back of the engine mount.

I set the engine mount beside the main airframe tube to mark a dowel that will apply a glue line inside the tube. Note the pencil line where the glue will contact the upper centering ring.

Glue was applied to a dowel end and transferred inside the tube.

The mount was slid in with 1/8" of the engine hook exposed out the back end.

A length of heat shrink tubing is supplied to slide over the Kevlar line and down to the top of the engine mount. The tubing protects the Kevlar at the low end from the ejection charge.

To be honest - 
I didn't remember to slide the tube down the Kevlar line!
Here's some shrink wrap on Kevlar before and after being hit with a heat gun.




Considering how hot a heat gun is, the shrink wrap sleeve should give good protection to the Kevlar line 

Roll the Kevlar to keep it out of the way when sliding the mount into place.

The lower centering ring got a glue fillet smoothed out with a Q-tip.

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