emlang93
Member
- Joined
- Mar 4, 2017
- Messages
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I am leading a rocket team in building a large rocket, 17 feet tall and 18 inch in diameter. We are wanting to use 6 ground start K motors surrounding a center air start 'L'.
The current plan is to use a custom built ignition system onboard the rocket. Will be redundant for its ignition circuits. Will also be using BKNO3 ignitors that will be doubled up with e-matches. (Had good luck with reliability of BKNO3 over the years)
The idea is a launch signal can be sent and start the ignition sequence. Then the ground starts will light and a timer will control the air start. We are planning for enough thrust so even if there are 2 motors not lit, the rocket will leave the pad stable. Just won't be as cool.
Now for the questions.
1) does this sound feasible?
2) has anyone done this?
3) what are some of the designs principles to consider with a large number cluster? Angle the motor exhaust outboard a little bit for stability?
4) any other suggestions?
Just want to see what people's thoughts are and any ideas for us to consider in design.
-Evan
TRA 16099 L3
The current plan is to use a custom built ignition system onboard the rocket. Will be redundant for its ignition circuits. Will also be using BKNO3 ignitors that will be doubled up with e-matches. (Had good luck with reliability of BKNO3 over the years)
The idea is a launch signal can be sent and start the ignition sequence. Then the ground starts will light and a timer will control the air start. We are planning for enough thrust so even if there are 2 motors not lit, the rocket will leave the pad stable. Just won't be as cool.
Now for the questions.
1) does this sound feasible?
2) has anyone done this?
3) what are some of the designs principles to consider with a large number cluster? Angle the motor exhaust outboard a little bit for stability?
4) any other suggestions?
Just want to see what people's thoughts are and any ideas for us to consider in design.
-Evan
TRA 16099 L3