Loc 4 Jolly Logic

[InvertedMomentum]

I recently got my Junior L-1 Certification with an H motor and I’m thinking about flying higher with an I motor, but I’m worried about it drifting far away. I have a jolly logic chute release and I was wondering if it would work and, if so, how reliable is it for high power? I'm also setting up duel deployment for the Loc 4, so should I just wait and use the duel deployment?

 

[crossfire]

I use my JLCR all the time it works well for me. Just make sure it's powered up.

 

[bobbyg23]

100% success with mine. On high power.

 

[Dave Pritts]

I use my JLCR for F thru I motors all the time. Great asset to the hobby.

 

[SmurfTacoSupreme]

I just got my L1 on a LOC IV (older version) w/JLCR. Worked a treat. Just make sure you ground test and ideally fly it on a MPR before you try on a HPR -- to ensure you get your technique down.

 

[teepot]

I have had a JLCR for a few years. Works great. Some advice. Remember to turn it on before flight. Use a hair scrunchy or a silicone band instead of the rubber band. I use the silicone bands. Some times the rubber band sticks to the chute. Silicone is slicker and stronger. They also come in different sizes. Remember that the rocket is falling quickly so set the altitude high enough that the chute has time to open. I use 500' and 600'. A light rocket you can bring lower. A heavy rocket higher. Hope this helps.

 

[SmurfTacoSupreme]

I used 300', but it was windy and my rocket is relatively light ~1100g/2.4lbs. Still drifted a fair bit.

 

[jmasterj]

The only time mine hasn't worked was the time I didn't turn it on again after testing it.

 

[InvertedMomentum]

I have had a JLCR for a few years. Works great. Some advice. Remember to turn it on before flight. Use a hair scrunchy or a silicone band instead of the rubber band. I use the silicone bands. Some times the rubber band sticks to the chute. Silicone is slicker and stronger. They also come in different sizes. Remember that the rocket is falling quickly so set the altitude high enough that the chute has time to open. I use 500' and 600'. A light rocket you can bring lower. A heavy rocket higher. Hope this helps.

I have had a JLCR for a few years. Works great. Some advice. Remember to turn it on before flight. Use a hair scrunchy or a silicone band instead of the rubber band. I use the silicone bands. Some times the rubber band sticks to the chute. Silicone is slicker and stronger. They also come in different sizes. Remember that the rocket is falling quickly so set the altitude high enough that the chute has time to open. I use 500' and 600'. A light rocket you can bring lower. A heavy rocket higher. Hope this helps.

Thanks for the suggestions! I’ll certainly keep that in mind

 

[racerRobert]

I have flown JLCR on 18" to 48" parachutes on up to a J400 motor in up to a 4 inch several pound rocket

1. I did have a period where the parachute would pull out of rubber band at apogee - long walk
2. A MUST that you watch the JL youTube tutorial on folding the chute for JLCR. Once I followed it exactly, chute now does not pull out at apogee
3. Always stress test the rubber band by pulling on it hard between your hands. There are a lot of poor quality rubber bands in the marketplace. Even two of the JL provided rubber bands with the JLCR failed the stress test.
4. ALWAYS test release per the video which assures that the current setup will release. Easy to be lazy here. This will also help you learn what works best for the JLCR.
5. You want the rubber band to be a straight pull out of JLCR across the chute ball. It is tempting to have the JLCR on the edge of the chute ball, but most times this will overload the power of the servo release because of too much side pressure.

 

[Highpowerrocketyahoo]

These seem to be out of stock everywhere. Anyone know a source?

 

[jmasterj]

These seem to be out of stock everywhere. Anyone know a source?

https://the-rocketman.com/chute-release/

 

[rcktnut]

I recently got my Junior L-1 Certification with an H motor and I’m thinking about flying higher with an I motor, but I’m worried about it drifting far away. I have a jolly logic chute release and I was wondering if it would work and, if so, how reliable is it for high power? I'm also setting up duel deployment for the Loc 4, so should I just wait and use the duel deployment?

Here's another thread with more info: Jolly Logic Chute Release | The Rocketry Forum

 

[DaHabes]

I got my L2 cert using a JLCR, no dual deploy. Not necessary. Keep it simple.