Wednesday, April 9, 2014

Quest X-15 Build, Part 3, Kevlar in the Engine Mount

This mount will get the replaceable Kevlar punches.
To be sure the Kevlar tube is directly opposite the engine hook, a pencil "X" was drawn on my work area.
The disk was centered and two pencil marks made at the top an bottom of both rings.

Using the rotary punch the appropriate holes were made for the hook and Kevlar slide tube.
In the inset picture is the upper an lower ring. The smaller holes on the left side is for the Kevlar Q-tip tube. The holes on the right are for the engine hook.

Dry fit the rings to be sure the hook and Q-tip tube are straight before applying any glue.
I also wrapped the electrical tape over the hook and tube before the rings were glued on. With the rings in place you can better center the electrical tape wrap.

I start the tape wrap a quarter turn before the hook. The tape goes all the way around and over the hook twice. It end finishes directly opposite the start of the tape wrap.
This makes a 1 1/2 wrap of tape around the tube. The tape passes over the hook twice.


Here's the finished mount, the top view is on the right.

Notice the Q-tip tube doesn't extend too high up the top end of the motor mount tube. This keeps the plastic away from the hot ejection charge. I haven't had any problem with the tube end melting if it is recessed down from the top end.

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