# JLCR rubber bands?

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#### mtnmanak

##### TRA & NAR L3
TRF Supporter
Anyone happen to know the size rubber bands (small and large) that the JLCR uses? I am sure I can get hundreds of them on Amazon for the price they charge for 10 or so, but not sure what sizes I should order.

#### manixFan

##### Not a rocket scientist
I’ve been making my own by tying Estes style elastic into a loop. That allows me get the size that seems to work the best. It’s also not sticky like the rubber bands seem to be. I have several different weights so I can pick the one that has the right stretch and strength.

I practiced and tested many times before my first flight to make sure I had it right.

Just my experience, YMMV.

Tony

#### Voyager1

##### Well-Known Member
TRF Supporter
Anyone happen to know the size rubber bands (small and large) that the JLCR uses? I am sure I can get hundreds of them on Amazon for the price they charge for 10 or so, but not sure what sizes I should order.
It's on their website!

The standard kit includes:
• Ten(10) regular elastic bands 1-3/4 x 1/4″
• Five(5) large elastic bands 3-1/2 x 3/8″
Any similarly sized bands will do. You can buy a pack of 100 or more for a few $. PS. This probably should be in the Recovery section. #### teepot ##### Well-Known Member TRF Supporter I switched over to silicon bands. They are not as sticky as rubber bands and they come in different sizes. I bought a couple of sizes on Amazon for a couple dollars. #### DAllen ##### Well-Known Member Hair ties for the win. #### David Schwantz ##### Well-Known Member TRF Supporter I like the sticky bands as they will not slide off the bundle. Using it on a 9' main. #### mtnmanak ##### TRA & NAR L3 TRF Supporter Thanks everyone, lot's of awesome info! I’ve been making my own by tying Estes style elastic into a loop. That allows me get the size that seems to work the best. It’s also not sticky like the rubber bands seem to be. I have several different weights so I can pick the one that has the right stretch and strength. I practiced and tested many times before my first flight to make sure I had it right. Just my experience, YMMV. Tony Hadn't thought of this, I have loads of Estes rubber band shock cord laying around from the past 40+ years. Always told myself I would find a use for it someday, now maybe I can! #### Dipstick ##### Well-Known Member Fabric hair ties are exactly what you need. #### GlueckAuf ##### Well-Known Member Those rather weak rubber bands provided by JLCR, once nicked, start a tear that will quickly break, in my experience. The consequence is usually full deployment of the chute at apogee, defeating the purpose of the$130 device.

Like others have mentioned, I too have switched to fabric/elastic bands like hair ties for all of my JLCR-equipped rockets regardless of size. They’re far more durable, and thus reliable, than rubber bands. Likewise, they slide out of the air frame easier (though talcing the rubber bands helps), are more economical, and don’t seem to harden with age or exposure to ejection gas like the stock solution does.

#### crossfire

I started using 3/4" fabric elastic. It's very easy to adjust for different chute sizes. I am 100% since I switched.

#### mtnmanak

##### TRA & NAR L3
TRF Supporter
Post no. 50 in this thread is what I also use with 100% success: Jolly Logic Chute Release | The Rocketry Forum
That stuff looks pretty similar to the Estes Pro Series shock cords (no idea if Estes still uses this stuff). I have loads of it hanging around. Pulled out a fist full and am going to test it out. May as well use it!

#### SkywackerJim

##### Member
I started using 3/4" fabric elastic. It's very easy to adjust for different chute sizes. I am 100% since I switched.
I’ve been using 3/4” elastic too. Wide enough that it doesn’t get wedged in between the folds of fabric. Haven’t tried the hair ties but think they would work well too.

#### Tractionengines

##### Well-Known Member
TRF Supporter
I use hair ties as well, as a few have noted. They have enough grip to not slide ; yet release well.
Also, can get them almost anywhere, and in quite a few sizes.

(Edit for spelling...)

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#### DaveRKP

##### Active Member
Another solid vote for the hair ties - based on my experience, they perform consistently!

#### mikebpd221

##### Active Member
I adopted silicone baking bands. Heat proof, reliably elastic and they don’t bind to chute fabrics. The ones I have are perfectly sized for 2”-3” diameter rockets which is all I fly as of yet.

#### John Beans

##### Founder, Jolly Logic
TRF Supporter
Love to hear that folks are experimenting with various bands. There is no magic to the ones we use, other than high latex content.
Just remember to always use something elastic, not a hard zip tie or other non-elastic band.
Once you've overstressed your Chute Release, you will have nicked the internal catch, rounded the pin, or both. At that point the catch is not secure and can be pulled or jiggled loose. The solution at that point is replacement of the internal catch and external pins.
Some of you may have noticed that we have begun shipping black UV-resistant bands in the Accessory Kit we sell.