Forums: Skydiving Disciplines: Canopy Relative Work:
Technically not a crw question

 


skyturtle

Mar 22, 2012, 8:39 AM
Post #1 of 12 (1622 views)
Shortcut
Technically not a crw question Can't Post

But i thought this might be the best forum to ask.

I was wondering how BASE canopies/jumpers survive terminal openings when they're freepacked and yet CRW canopies can seriously hurt you at terminal? Is the nose on a BASE canopy not quite the same as a CRW one (although i would have thought it would be due to the desire for quick openings)? Or is it simply that BASE canopies tend to be mainly F111 and that reduces opening shock (?). (I have very little knowledge of CRW gear and even less of BASE set ups).

How come reserves dont have a "crw like" nose? As far as i know (which is very little) the only things done to make a reserve open fast is the slider and packing method. Incidently what does make a reserve open quickly?

Is there any way to freepack a crw canopy for terminal? (im talking short of modifying the canopy/sticking a bag on it etc.

I have a really basic knowledge of gear here but im interested in CRW and how the gear is different.


obelixtim  (D 84)

Mar 23, 2012, 4:16 AM
Post #2 of 12 (1551 views)
Shortcut
Re: [skyturtle] Technically not a crw question [In reply to] Can't Post

 CRW canopies are not usually deployed at terminal. They are rigged and packed to open quickly.

You can pack them so they open on a particular heading to minimise opening separation....in competition it is important to get that first formation together in the minimum time possible.

A reserve is packed with the nose "open" to speed up the opening. Apart from that it is just another canopy, packed in a freebag.

If you want to take a CRW canopy to terminal, put it in a bag or put some sort of reefing system on it.


Electronaut  (C 38872)

Mar 23, 2012, 8:50 AM
Post #3 of 12 (1532 views)
Shortcut
Re: [skyturtle] Technically not a crw question [In reply to] Can't Post

Quote:
How come reserves dont have a "crw like" nose? As far as i know (which is very little) the only things done to make a reserve open fast is the slider and packing method. Incidently what does make a reserve open quickly?

Not all reserves have openings in their sliders. And reserves aren't really packed much different than normal terminal mains, it's a PRO pack that looks a little different.


skyturtle

Mar 23, 2012, 11:31 AM
Post #4 of 12 (1521 views)
Shortcut
Re: [Electronaut] Technically not a crw question [In reply to] Can't Post

so excusing the slider a reserve is just a canopy designed so its fast opening and the nose isnt rolled in a slightly different PRO pack?


theonlyski  (D License)

Mar 23, 2012, 6:39 PM
Post #5 of 12 (1497 views)
Shortcut
Re: [skyturtle] Technically not a crw question [In reply to] Can't Post

In reply to:
so excusing the slider a reserve is just a canopy designed so its fast opening and the nose isnt rolled in a slightly different PRO pack?

The nose is exposed to speed up the opening and reduce the chance of lineovers.

Some reserves were used as mains (and they all even had main canopy bridle attachment points).

Not sure what you've heard about the sliders, but most are pretty similar to main sliders, except most if not all the reserves I can remember off the top of my head had brass grommets instead of stainless and weren't collapsible. PD sliders have a hole in them, but many other manufacturers don't. Just another way to skin the cat.


skyturtle

Mar 25, 2012, 4:19 AM
Post #6 of 12 (1448 views)
Shortcut
Re: [theonlyski] Technically not a crw question [In reply to] Can't Post

that was pretty much it, just different grommets and pd is known for cutting holes in them


rpersi  (D 22042)

Mar 25, 2012, 9:46 AM
Post #7 of 12 (1435 views)
Shortcut
Re: [skyturtle] Technically not a crw question [In reply to] Can't Post

In reply to:
I was wondering how BASE canopies/jumpers survive terminal openings when they're freepacked and yet CRW canopies can seriously hurt you at terminal? Is the nose on a BASE canopy not quite the same as a CRW one (although i would have thought it would be due to the desire for quick openings)? Or is it simply that BASE canopies tend to be mainly F111 and that reduces opening shock (?).

The F111 vs ZP fabric have a lot to do with it. BASE sliders are typically fine hole mesh and most lightnings are the large hole so there is also a small difference there.


Is there any way to freepack a crw canopy for terminal? (im talking short of modifying the canopy/sticking a bag on it etc.

I used my Lightning for wingsuiting by putting a regular slider and d-bag on it. The openings were a little brisk but not uncomfortable by any means. Why do you need a CRW canopy for terminal?


skyturtle

Mar 25, 2012, 3:39 PM
Post #8 of 12 (1422 views)
Shortcut
Re: [rpersi] Technically not a crw question [In reply to] Can't Post

I dont, more out of curiosity than anything. I was just wondering if it could be done, and if not why.


Hellis

Mar 26, 2012, 12:50 AM
Post #9 of 12 (1399 views)
Shortcut
Re: [rpersi] Technically not a crw question [In reply to] Can't Post

In reply to:

The F111 vs ZP fabric have a lot to do with it. BASE sliders are typically fine hole mesh and most lightnings are the large hole so there is also a small difference there.



I use a large hole mesh slider on terminal BASE jumps.
I even expose the center of the nose just as on a slider off jump.


kleggo  (D 8292)

Apr 6, 2012, 8:09 AM
Post #10 of 12 (1269 views)
Shortcut
Re: [skyturtle] Technically not a crw question [In reply to] Can't Post

In reply to:
Or is it simply that BASE canopies tend to be mainly F111 and that reduces opening shock (?).

good question and this IS a good place to ask since there are significant similarities / skill sets that cross both BASE and CReW.

if excluding packing technique (including use / type of slider), differing canopy trim and "material" are the primary reasons affecting opening characteristics.

craig


ScoobieDoo  (D 24795)

Apr 6, 2012, 10:09 AM
Post #11 of 12 (1261 views)
Shortcut
Re: [skyturtle] Technically not a crw question [In reply to] Can't Post

I asked "Rusty Vest" this question, Can you take lightning to terminal with a d-bag and fabric slider(normal style). His response was he test jumped a lot for PD and it can be done BUT recommends DO NOT! It just beats your body up so much and is not worth it unless you are getting paid big bucks to do it.
I think the design to open fast and to reinflate fast would cause you to get beat up at terminal after a few times. That's not to mention the extreme wear and tear on the canopy as it's design was for sub-terminal openings. Not worth beating yourself up or the $2K canopy.
So even with a d-bag and normal slider it is NOT a good idea to deploy at terminal!


ScoobieDoo  (D 24795)

Apr 6, 2012, 10:14 AM
Post #12 of 12 (1260 views)
Shortcut
Re: [rpersi] Technically not a crw question [In reply to] Can't Post

What is the wingsuit airspeed at when you deploy your lightning? You even say the opening a little brisk, so that means you wouldn't want to do more then say 4 jumps in a day to avoid getting beat up?



Forums : Skydiving Disciplines : Canopy Relative Work

 


Search for (options)