I launched my first Q-Jet this last weekend, an A3-4.
Here's the engine after firing. This was from a bulk pack, there is no label on the bulk pack engines.
The scratches are from the engine hook, the tape was set down the casing lengthwise as a guide for cutting it in two.
This was a tough casing to cut through, that plastic is pretty dense.
At the nozzle side there is a cardboard "spacer", the composite propellant was ahead of that. I would assume the entire lower cavity is filled on the D engines.
Before I added the wording, you could tell visually where where the propellant and delay element were positioned.
The ejection charge is are to the right side in the small diameter area. If you look close (towards the outside wall) you can make out the threads where the ejection canister is screwed into the top of the casing.
> Never, no NEVER cut apart a new, unfired, live engine.
ReplyDeleteI definitely cringed during this scene in the movie "Runaway" (1984).
a section of the scene is cut out in the video linked -- they first freeze the bullet (that supposedly rendered the live round inert), then proceed to cut it in half (the bit that was cut out in the video).
Kinda interesting to see that the Quest motors don't have the propellant nozzle sticking down past the side wall of the casing. The Aerotech single use D10's and D21's are configured a little differently. And the two I mentioned are 18mm motors.
ReplyDeleteI see an oring too!
ReplyDelete