Forums: Skydiving: Gear and Rigging:
170 in a J5?

 


everymansaved  (C License)

Aug 22, 2006, 3:38 PM
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170 in a J5? Can't Post

Hey all. I have a javelin J5, and it's got a triathlon 190 in it right now, which is working out well. I'm thinking about going down to a 170 for next season, something like a pilot or a safire, but the sunpath website only says "up to 230 sq. ft." for the j5. It seems like I could just shorten the closing loop and it would be fine. Can I get some rigger's opinions?


mjosparky  (D 5476)

Aug 22, 2006, 8:22 PM
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Re: [everymansaved] 170 in a J5? [In reply to] Can't Post

You have 40 jumps and you are already talking about going from 1.24:1 to 1.38:1. How many jumps do you plan on making by next season?

Take the money you would spend on a 170 and buy a newer reserve.


everymansaved  (C License)

Aug 22, 2006, 10:39 PM
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Re: [mjosparky] 170 in a J5? [In reply to] Can't Post

The jump number isn't completely up to date, and I've been talking in length to the coaches and instructors at my DZ, and we're all really comfortable with this, especially since it's not going to be until next year.


mjosparky  (D 5476)

Aug 22, 2006, 11:16 PM
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Re: [everymansaved] 170 in a J5? [In reply to] Can't Post

In reply to:
and we're all really comfortable with this

Run this statement through search and see how many hits you get. It goes along with, "I can handle it" and "I know what I am doing".

I wish you luck and try to be careful.Crazy


everymansaved  (C License)

Aug 23, 2006, 12:06 AM
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Re: [mjosparky] 170 in a J5? [In reply to] Can't Post

I definitely will. I'm not really the type to do anything too rash. Personally, I don't see a problem with it if it's being OK'd by coaches and instructors with '00s or '000s of jumps that have watched me fly and land.


mjosparky  (D 5476)

Aug 23, 2006, 2:43 AM
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Re: [everymansaved] 170 in a J5? [In reply to] Can't Post

Quote:
It goes along with, "I can handle it" and "I know what I am doing".

I forgot to add "Personally, I don't see a problem with it "Crazy


baron_68  (D 21933)

Aug 24, 2006, 7:26 AM
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Re: [everymansaved] 170 in a J5? [In reply to] Can't Post

I have a 170 in a J4 and it's still al loose fit. If you just shorten the closing loop the top flap will end up too far dwon to get the tuck tab to stay in place. At least that's been my experience.


everymansaved  (C License)

Aug 25, 2006, 5:33 PM
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Re: [baron_68] 170 in a J5? [In reply to] Can't Post

Yeah, that's what I'm kind of worried about. Anyone else with opinions?


seal_S49

Aug 26, 2006, 5:29 AM
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Re: [everymansaved] 170 in a J5? [In reply to] Can't Post

In reply to:
Yeah, that's what I'm kind of worried about. Anyone else with opinions?

Since you asked, here are several more considerations:

1) A 9-cell will pack bigger than a 7-cell of similar square-foot size. I've packed a 190 7-cell that seemed only slightly bigger than a 175 9-cell. Square to eliptical may make a difference also. Different mfrs' published pack volume may not always be an accurate comparison.

2) Anytime you change the length of your closing loop, make sure you have a tight enough pack that you won't be at risk for premature deployment.

3) Puckering flaps from a loose main fit may be more that just a cosmetic problem. If the container is not filled out, you may compromise the security of your main deployment system. Throw-out bridle can hang out between pin & PC pouch or pull-out pud can come loose from velcro if pack is too loose.

4) The more you mismatch your main & reserve size (& performance envelope), the less stabile your flight will be during a dual deployment.

BTW, since you didn't ask, I won't comment on your experience or choice of canopy size. However, that may be the most important question of all.


(This post was edited by seal_S49 on Aug 26, 2006, 5:32 AM)


everymansaved  (C License)

Aug 26, 2006, 7:09 AM
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Re: [seal_S49] 170 in a J5? [In reply to] Can't Post

Thanks much, that's the kind of info i'd hoped for!



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