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I have a fox with full zp topskin. I don't think i need to use the multi on it because I once had a full zp topskin mojo and never had any problems with center cell strip or anything else on that parachute and it did not have multi.

I think that the standard attachment point on the fox is nice and strong and reinforced. good to go.

I am inclined to remove the multi points. i don't need to be carrying around those ring things and extra bits of fabric all over the place.

of course, i post this because Apex requires its installation, they probably know best, and here i am jumping without using it. but i just cant see why i need to use it.

Is it Mountain flying, BASE jumping, bridge falling you are going to do? Very important to know JT! And I would trust the poll for sure ;-)

Have a great day you Cold War maker!

a bit of everything, but mostly slider up wingsuit. some sub terminal slider up and down. i am not planning to get yanked out of the sky with oversized ZP pilot chutes. i dont need to get hundred jumps out of the canopy. it seems to me the center cell stripping would occur over lots and lots of jump of hard yanks.

Hey jt, I think you are not getting what center cell strip is. It is when during canopy extraction, the center cell gets pulled away from the folds of the packjob, not the center cell getting unstitched from the other parts of the canopy. The big problem here is all the line attachments getting separated, slack in the lines above the slider and the tail pocket moving away from the primary stow. From an engineering standpoint, all zp topskin canopies would be more prone to this and the multi would be an aid to this not happening to such a degree. I think that is what the kind folks at Apex are talking about.

Think of it this way. If you jump a round parachute you'll never have center cell strip because a round has a common center point and is, in essence, a single cell canopy.

But you're jumping a 7-cell canopy and only one of those cells, the center one, is directly attached to the bridle and pilot chute. So as the container opens the bridle starts to pull the pack job up and out of the container by the center cell and the higher the PC force the more easily all the other cells can be left behind.

If you have a tight F-111 pack job the cocoon that is your parachute will generally stay together until line stretch when you want it to start inflating. But with ZP it's harder to keep that cocoon together, one because ZP is slippery, and two because ZP wants to expand on its own. Think harder to pack - easier to unpack.

We actually began dealing with center cell strip before we had tail pockets. So when we had the lines lying in the bottom of our containers - center cell strip - was something you really had to avoid.

Here's an old drawing from when BASE jumper Mark Hewitt first brought center cell strip to our attention in 1987.

NickD

And TJ,

I just looked at your profile. Please change the title of that video. I jumped that place a lot in the 80s, a few times in the 90s, and I may want to go back and jump it again in the 00s . . .

Use your head for something besides a camera dolly! Try thinking!

Now, I hope you get Center Cell RIP . . .

NickD

There is an alternative to stripping in the sky, and that is stripping on the ground.

Prestripping also increases the likelihood of tailgate or blue painter's tape staying intact until full line stretch as the lines and folds do not shift against each other.

ok. yes. I was WAY off. had no idea what center cell strip was.. still dont get in entirely but your explanation and Nick's picture make sense.

you mention the real problems being "all the line attachments getting seperated, slack in the lines above the slider and the tail pocket moving away from the primary stow." that sounds to me like stuff that happens in all my deployments, perhaps it happens more with the ZP topskin fox. what are the potential consequences of these things? malfunction? or canopy damage?

Yuri,
yes. that's the money move there. I do that on every packjob now. slider up/down, wingsuit or not.

the final folds are usually all the same, a "Z", the way most people do it,
then the "G", the way i was taught with the Vertigo Warlocks,
and then this "Roll", or spiral, or even "@" final fold that I started to use in the last year.

definite money. this along with the nose around tail/anti-lineover consolidation folds really are the best packing tricks, in my opinion.

I am starting a different thread on cell strip so as not to screw up your thread.
Take care,
space

you should use 3m e tape for a bridle and duck tape for a tail gate much better then a muiti