# Chute Release questions

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#### Lowpuller

##### Well-Known Member
Tango

When you finally break down and buy one, and you will, you will be asking yourself "Why didn't I do this sooner!"

It opens up a world of options and let's you fly'em high and fast.

Only current down side is sizer, it won't fit in a lot if smaller rockets, but I suspect that will change in the very near future.

#### TangoJuliet

##### Well-Known Member
Tango

When you finally break down and buy one, and you will, you will be asking yourself "Why didn't I do this sooner!"

It opens up a world of options and let's you fly'em high and fast.

Only current down side is sizer, it won't fit in a lot if smaller rockets, but I suspect that will change in the very near future.
You're right... Eventually I will. :wink: I also read that there is a smaller one on the way, just probably not before next Winter. Maybe by the time I get my Ventris SRB project completed I'll break down and buy one.

#### qquake2k

##### Captain Low-N-Slow
Use common sense and allow sufficient release altitude for a stubborn chute to fill. Setting an HP rocket to open at 200' is tempting fate. 700' is my HP rocket minimum.
I agree 200ft is too low. But 700ft might be too high. I'll probably go with 500ft. What's the worst that could happen? LOL

#### dhkaiser

##### Well-Known Member
I routinely use the CR set at 300ft with 2.2, 2.6 and 3" rockets. Check the rubber bands for wear and fold chute as directed, never had a problem. Comes with extra bands and pins.

I routinely use the CR set at 300ft with 2.2, 2.6 and 3" rockets. Check the rubber bands for wear and fold chute as directed, never had a problem. Comes with extra bands and pins.
Absolutly + 1.....
It really is up to what type of chute you use and how you fold / pack it up...
Ever notice how some guys get their chutes to inflate quickly and some are more hit or miss,,
no matter whether from an e charge deployment or a chute release...
There's a reason for this....

Teddy

#### qquake2k

##### Captain Low-N-Slow
I've always used the relatively unrecommended roll method with the shroud lines wrapped around the chute. Never had a problem. My chutes always open pretty quickly.

#### woferry

##### Well-Known Member
I had a band break once, though I'm pretty sure I know why. I've always tried following John's technique of folding the shroud lines inside the chute, but that particular pack I think things were loose enough inside that when things started to pull in air the strap tried to pull the CR further up the chute, and broke the band in the process. So the main came out at apogee, and when I recovered the rocket the band was broken and the pin was missing (so it clearly released at the appropriate time). John sent me a replacement pin and a long piece of the cord, I've been intending to both make a longer loop for the CR attach itself, and considering the rest of it to make a 'backup loop' to hold the pin in case the band breaks (just so that I don't lose the pin), but I am a bit afraid that this extra loop could create a tangle, so I haven't actually done it yet. I do now do a final 'tug' on everything to ensure that the shroud lines are taught with there still being slack on the CR's strap before I wrap my chute protector 'burrito'.

I had a second flight (most recent Snow Ranch) where I thought the band had broken again, the main was out at apogee, but when I recovered it the band was intact. I continue to have terrible luck with AT motor ejects, this was an undrilled J180T-L where the motor charge went off at 6.8s after burn-out instead of the expected ~14s, and I guess the early ejection pulled the chute out of the band without breaking the band, unless it somehow tricked the Chute Release into releasing early. Either way, no parts lost (and I've flown that band 3 more times already), just an early main parachute deployment, leading to it spending about 4 minutes in the air and landing about a half-mile away, still easily found thanks to an Eggfinder TRS.

But lots of other totally successful flights, including two more yesterday on my Nike Smoke, a J401FJ and a J1520VMax, both flights to ~4800' with the main releasing at the expected 500' and short walks even though it was pretty breezy at ground level.

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#### MALBAR 70

##### More Rockets Than Room
TRF Supporter
The only CR failure I've had was when dumb ass (me) forgot to turn it on

The JLCR does come with several extra rubber bands of various lengths under the foam packaging. There are also extra tethers and pins.
I have found that daisy chaining two rubber bands together for larger chutes takes some of the strain off the bands and still holds the bundle tight enough.

#### ksaves2

I recently ordered an Altimeter Three to replace the One. I got a neoprene USB drive case that will hopefully protect it.
Don't you think it might strip in the slipstream on descent? Maybe duct tape over that hole?

Lost pins? Mr. Beans has more. Ask him. Don't put too many pieces of kevlar string near the device as there is the risk it could tangle the whole assembly.

I've had 3 failures. One where the whole assembly fouled with the harness and two where after ejection the chute protector didn't fall away from the CR/chute. The Chute Release did its thing but the stiff chute protector kept everything closed!
I remedied that by affixing the chute protector on the harness with a little distance between the chute protector and the packed assembly. There's a slack bit of harness between the protector and the chute pack. When the ejection occurs, the chute protector is pulled off the packed chute assembly and is out in the breeze completely. I've done this and it's been 100% so far on the next three flights.

I didn't count the smoky burnout rocket:

Forward closure failure. When seeing two colored plumes on liftoff, that's trouble! Rocket was only up maybe 200 feet and tumbling. Charge blew and the Chute Release immediately released but there wasn't enough altitude for the chute to fill. Another 50 feet and it might
have made it. Rocket was repaired with a coupler I painted black so it now flies with what looks like a hole in the side. FG rockets can take a beating with soft farm ground to hit.

Though the kevlar cord looks ratty, it's still plenty strong. The forward cutting plume of propellant came out about 180 degrees on the other side and the Dino shockcord protector which I had encased in a sleeve of the Borate/Boric acid soaked "fireproof" cardboard via duct tape took the brunt of the heat:

Just flipped the Dino protector around as there was a little "melt" injury on the end closest to the forward closure but still a lot of life left in it. Rocket has had four successful flights now with a GPS tracker and Chute Release. Go soak yourself some cardboard in
borate/boric acid fire proofing solution. Can be cut in strips to "protect" a chute protector and can also be used as a divider between a harness and the ejection flames. The end can be folded 90 degrees to help blunt a flame front. Since one can size it to fit loosely it's helpful and cheaply disposable when blown out of the rocket at ejection time.

Kurt

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