I've had 100% success until this last weekend; aside from the low deployment.I've had multiple failures where a JLCR activates without chute deployment. One of these resulted in a broken Eggfinder and Quantum(I was using the Quantum to deploy at apogee and the JLCR as the "main" in a stubby rocket without room for traditional DD). I have since reflown that one successfully with a different packing technique and increased tension (I use a sewing elastic band and adjust the knot to tailor tension for each 'chute, holds up a lot better than the rubber bands which all deteriorated on me).
One rocket I always have issues with is the MDRM - my JLCR deployments on that one have about a 50% success rate. I think the main issue with that one is that the huge fins and light weight of the rocket mean that it falls relatively slowly in a tumbling fashion. It's almost as if it doesn't achieve enough downward velocity to result in a solid positive inflation of the chute. My rockets that fall faster seem to have chutes that snap open with authority.
Jolly Logic Chute Release, chutes not inflating....
- Thread starter DankMemes
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Brian Kirksey
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Great thread for someone like me who has not used one yet, but will one day soon. Thanks everyone.
Don Allen
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Unfortunately this can happen with even the "cleanest technique". The cure is using a "Recovery" or Chute Sled.
I like this setup here. What exactly is the sled made of? It looks like a shoe-horn, lol. Also, you have a nice coiled/taped shock cord that I was admiring.
jahall4
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Hi Don, This is one is made out of a mailing tube coated in colored finish epoxy, just happen to be the right size. These are made from Polycarbonate, sort of a production prototype.
Don Allen
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These are very nice. I've been debating whether to use a CR or actual deployment bag but this sled looks like it would be easy peasy to slide out the CR. Does it work well for you? Looks like the bees knees
jahall4
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These are very nice. I've been debating whether to use a CR or actual deployment bag but this sled looks like it would be easy peasy to slide out the CR. Does it work well for you? Looks like the bees knees
Yep, Never had a failed deployment using one. The concept was developed after a larger chute failed to inflate while using a JLCR. Using inflight video determined that the harness can wrap around the chute. Next to impossible w/ the harness running through the sled. Further the sled acts as a sort of body tube to contain the chute and the band on the JLCR naturally grips the sled.
https://www.facebook.com/TheMarvinW...Ta-gvpqNdAJpEGyKA_jwH_-tNErb4QwmLF5&__tn__=-R
boatgeek
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In small diameter rockets, I have had much more success with folding teh chute over the JLCR and then wrapping the band a wrap and a half. See post #9 here for pictures: https://www.rocketryforum.com/threads/jlcr-in-38mm-rockets.149016/#post-1829002 That's more to prevent the bundle from jamming in the tube and failing to eject. That said, wrapping more than once around the chute alone is asking for trouble.
snrkl
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I think I saw all 5 times
Is there a non facebag link for the slide? Fakebook won’t let me see the post without having a login.
jahall4
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Follow UP: @John Beans advice was spot on, Just flew this past saturday at Spaceport Rocketry in Palm bay, packed the chutes hard as a rock, like John suggested and had many flights without issue. The estes pro series chutes are thick material and a bit grabby apparently with the bands, so pack em tight seems to be the trick.
