My big saucers, big Sputniks, and my Flying Pumpkin all have rear eject. Simply have a solid bulkplate somewhere above the motor mount tube, don’t glue the motor mount centering rings to the airframe, blow the entire motor mount out the rear along with your recovery gear.How would I go about a rear deployed parachute? Not any particular build or rocket just in general. Would it involve redirecting the ejection charge blast with an mushroom or inverted funnel type shape?
A motor / parachute spool.How would I go about a rear deployed parachute? Not any particular build or rocket just in general. Would it involve redirecting the ejection charge blast with an mushroom or inverted funnel type shape?
So have a shockcord and parachute like kindof wrapped around the mount assembly? So that when it gets blown out, it drags along and unspools to deploy sorta? I'm bad at explaining things lolMy big saucers, big Sputniks, and my Flying Pumpkin all have rear eject. Simply have a solid bulkplate somewhere above the motor mount tube, don’t glue the motor mount centering rings to the airframe, blow the entire motor mount out the rear along with your recovery gear.
Thats exactly how my saucers are set up.So have a shockcord and parachute like kindof wrapped around the mount assembly? So that when it gets blown out, it drags along and unspools to deploy sorta? I'm bad at explaining things lol
Okay thankyou so much bc I was wondering how to do it. Yall are awesome with all the quick advice and stuff. I really appreciate it.Thats exactly how my saucers are set up.
The Sputniks and flying pumpkin have the chute and gear in the space above the MMT
Definitely. Also not the best “spike and fold” solution. There are lots of ways to skin this cat, here’s one:The only thing I would add is do not wrap the chute and shroud lines around the motor tube, just lay it on the side.
Otherwise you increase the risk of your recovery device not unfurling.
A motor / parachute spool.
I love rear eject chutes... Check out my Red Columbine or Warhawk build threads.
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I love this. Been thinking a long time how to do it, this is simple and brilliant. Thanks.Here's an oldie but goldie: Minimum diameter model with a rear ejection clip made out of a safety pin. I actually used one of these in my NARAM-12 Design Efficiency model. The model was made from an Estes Bt-10 mylar plastic tube (from their Streak kit) and a CMR plastic nose cone. It kinda melted both going up and coming back down.
The body & motor tube (with motor in it) are all attached together with the harness and will land together. The motor does not eject from the motor tube. The CG doesn't matter after ejection since it is all hanging under the parachute.I love this. Been thinking a long time how to do it, this is simple and brilliant. Thanks.
Now problem is how to use it? What happens to rocket body once motor ejected, at least if no electronics on board?
Glider? Dumping motor definitely drops unneeded weight, but CG shift is wrong (hmmm, unless it flies backwards….. that has potential…….)
Helicopter? Definitely do—able. Just need a mechanism to deploy rotors, Lots of ways to implement that.
Of course, both above can be done with simple motor eject. But this addition might make such more acceptable in certain fields or high wildfire risk areas where motor eject might make flyers or RSOs itchy or where unretarded motor eject is forbidden.
There must be other options I am just missing.
Can't argue with success, but seems a bit counterintuitive.The body & motor tube (with motor in it) are all attached together with the harness and will land together. The motor does not eject from the motor tube. The CG doesn't matter after ejection since it is all hanging under the parachute.
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