I’m a noob to duel deployment. It was suggested that to save space on the bulkheads of my 38mm AV bay that I place the charges in the body tubes.
Since I’m using pyrodex, (I know I know and will try to get the good stuff at the festival), I encased charges in plastic blood tubes as shown below. They ground tested beautifully with very consistent separations. The powder was first ground very fine, e-match inserted, dog barf tamped tight and lid hot glued.
In ground tests as I worked up from 0.5g, the 0.75g didn’t separate well and the charge hit the tube enough to crack some paint off the outside of the fiberglass. No trouble with paint when I got good separation using 1g.
To be on the safe side I’ve been placing the charge quip inside a small kevlar pouch to catch the plastic shrapnel. Unfortunately I only did tests with one quip inside this pouch, (I will be using redundant computers and charges in this rocket).
Question #1:
Is it safe to assume putting two charges nearby each other will blow both at the same time and potentially do what 2g would have done- this might not be tolerated by the thin walled fiberglass.
#2:
If so, how do you space the charges in skinny rockets- I assume his trying to space vertically but that may be tough in the payload/main compartment which is quite short.
#3:
Will the RSO allow me to bring charges like this to the inspection table? Something I read sad you can’t have the electric match in the powder when the connection is made. I’d like to know why this would be a problem so long as nothing is powered on (I have pull switch on one computer and a finger tech on the other). I can keep the charges safe (wires crossed in Kevlar bag) until I connect them up and move these little Kevlar bags into the rocket but this could be difficult to do at the pad compared to a table.
Thanks for all your help and advice, I’m excited to learn more and more.
Craig
Since I’m using pyrodex, (I know I know and will try to get the good stuff at the festival), I encased charges in plastic blood tubes as shown below. They ground tested beautifully with very consistent separations. The powder was first ground very fine, e-match inserted, dog barf tamped tight and lid hot glued.
In ground tests as I worked up from 0.5g, the 0.75g didn’t separate well and the charge hit the tube enough to crack some paint off the outside of the fiberglass. No trouble with paint when I got good separation using 1g.
To be on the safe side I’ve been placing the charge quip inside a small kevlar pouch to catch the plastic shrapnel. Unfortunately I only did tests with one quip inside this pouch, (I will be using redundant computers and charges in this rocket).
Question #1:
Is it safe to assume putting two charges nearby each other will blow both at the same time and potentially do what 2g would have done- this might not be tolerated by the thin walled fiberglass.
#2:
If so, how do you space the charges in skinny rockets- I assume his trying to space vertically but that may be tough in the payload/main compartment which is quite short.
#3:
Will the RSO allow me to bring charges like this to the inspection table? Something I read sad you can’t have the electric match in the powder when the connection is made. I’d like to know why this would be a problem so long as nothing is powered on (I have pull switch on one computer and a finger tech on the other). I can keep the charges safe (wires crossed in Kevlar bag) until I connect them up and move these little Kevlar bags into the rocket but this could be difficult to do at the pad compared to a table.
Thanks for all your help and advice, I’m excited to learn more and more.
Craig