lcorinth
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I'm about to try my hand at my first gap staged design, and had a couple questions. My plan is for a BT56-sized rocket that stages D to E BP motors.
My gut tells me that my vent holes should be pretty far forward on the booster, near the aft of the sustainer motor, since the hot gasses from the booster motor would be surging forward, but I'm not sure it really matters. I know they should be evenly spaced on opposite sides of the rocket, but I don't know if I've read where they should be placed on the length of the airframe.
My gut also tells me that I should have a longer motor tube, rather than a standard length tube, to direct the blast of hot particles from the booster motor, rather than just letting them spray all over the interior of the booster. I have a feeling I'll have a better chance of successful sustainer ignition if I have a tube that extends to maybe an inch or less from the aft of the sustainer motor, leaving enough space for the gasses to vent through the body tube holes.
Are my gut feelings correct? I can't remember whether I got these ideas from something I already read or not.
Thanks for your help!
Edit: I meant to select the question mark icon for this thread, but you guys got the smiley face. Which is just as well - I'm a friendly guy.
My gut tells me that my vent holes should be pretty far forward on the booster, near the aft of the sustainer motor, since the hot gasses from the booster motor would be surging forward, but I'm not sure it really matters. I know they should be evenly spaced on opposite sides of the rocket, but I don't know if I've read where they should be placed on the length of the airframe.
My gut also tells me that I should have a longer motor tube, rather than a standard length tube, to direct the blast of hot particles from the booster motor, rather than just letting them spray all over the interior of the booster. I have a feeling I'll have a better chance of successful sustainer ignition if I have a tube that extends to maybe an inch or less from the aft of the sustainer motor, leaving enough space for the gasses to vent through the body tube holes.
Are my gut feelings correct? I can't remember whether I got these ideas from something I already read or not.
Thanks for your help!
Edit: I meant to select the question mark icon for this thread, but you guys got the smiley face. Which is just as well - I'm a friendly guy.