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If you make something 100% foolproof, they will make a better fool.That said, nothing is 100% foolproof.
If you make something 100% foolproof, they will make a better fool.That said, nothing is 100% foolproof.
I've been using 10' on my BT-60 size rockets. Maybe 8' would work just as well. I also built a spool to roll up the cord and it has worked perfectly in my tests. I've watched the crochet method several times and haven't caught on to it. I also know people who use the figure 8 method and say it works well for them.
Any tips on preventing shroud lines from tangling with shock cord are appreciated! That happens a lot to me.
A lot of the time, for my LPR rockets, even with tangled shroud lines and shock cords, the tangled parachute, shock cord, and shroud lines just act like a big streamer and slow down the rocket enough that it lands unharmed or only slightly damaged. Got me to thinking (uh oh). In just how big/heavy of a rocket could I reasonably use a streamer as the recovery device? How big of a streamer? Two streamers? Streamers are so much easier to use than parachutes.
Or use a piece of kevlar tied to centering ring or tube coupler if you can get it to go far enough down the body tube?
I just cut 2 disks out of cardboard and glued them together with a small piece of balsa in the middle. I use a small wire tie to attach it to the middle of the shock cord.Any foolproof sources of cheap spools (probably 3D printed) that will work in a BT60? I'd be willing to try one as long as it works.
Ah, didn't see how you attached the spool.I just cut 2 disks out of cardboard and glued them together with a small piece of balsa in the middle. I use a small wire tie to attach it to the middle of the shock cord.
you can read the whole thread or scroll down to post #15
https://www.rocketryforum.com/threads/shock-cord-control.167471/
When I was trying to think of this I was making it too complicated. You just put the spool up against the middle point of the shock cord, tie something around it to hold it to the shock cord, and wind it up. In the first photo of my thread you can see that I had a notch in the disks for the bread tie to fit into. In later versions I drilled holes through the side disks for the tie to go through. After a launch it is possible that the spool would have to be slid along the line to the midpoint to be ready for another launch.Ah, didn't see how you attached the spool.
I wonder if a 10’ Kevlar cord would easier to get out of a monkeypod tree?When I was trying to think of this I was making it too complicated. You just put the spool up against the middle point of the shock cord, tie something around it to hold it to the shock cord, and wind it up. In the first photo of my thread you can see that I had a notch in the disks for the bread tie to fit into. In later versions I drilled holes through the side disks for the tie to go through. After a launch it is possible that the spool would have to be slid along the line to the midpoint to be ready for another launch.
We need some details to help at all. What size rocket (diameter, length, weight, etc), what kind of recovery devices (motor eject with chute release, dual deploy altimiter, etc.)Hi,
I have recently started looking into DD for the first time. I'm currently trying to devise a design so the drogue and main parachute are packed in the same section but they don't release at the same time. I was wondering if you had any experience in this area and if you have any advice on how to approach this?
Hi,
I have recently started looking into DD for the first time. I'm currently trying to devise a design so the drogue and main parachute are packed in the same section but they don't release at the same time. I was wondering if you had any experience in this area and if you have any advice on how to approach this?
That seems a bit large for the vast majority of LPR rockets.If you want a sure-fire method, use a deployment bag. Sky divers have been doing it for decades.
Fruity chutes sizes bags to the tube. They start at 3-inch tubes. Rocketman sizes to the chute. They start at 24" chutes.
If you make something 100% foolproof, they will make a better fool.
My mistake. I read posts via the "New posts" button, and often don't stop to look at what forum it is in.That seems a bit large for the vast majority of LPR rockets.
If the camera was present, that must've been an epic video!
Chuck Norris just catches them when them come back down.Parachutes?
Real Men just "Lawn Dart" them!
Whoa! Serious core sample! Been there. Done that.I keep looking at this post and laugh each time. The photo and the text need to be made into a poster.
Seriously.
Hans.
Why not use a streamer, at least for the light ones?I've tried to rid myself of all of the small diameter rockets as they're just isn't any room for even a plastic parachute in my opinion
I've tried to rid myself of all of the small diameter rockets as they're just isn't any room for even a plastic parachute in my opinion, And I tend to like nylon chutes instead of the plastic. After reading some of the post on here I don't think I will wrap the shroud lines around the chute anymore
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