Forums: Skydiving: Gear and Rigging:
7 cell vs. 9 cell

 

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adventurechick  (C 35899)

May 11, 2006, 11:11 AM
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7 cell vs. 9 cell Can't Post

Agh... still trying to figure out this rig, parachutes ect.

I want something docile, something I can land easily

I'm jumping a 9 cell navigator right now and trying to buy my first rig... some people tell me 9 cell is the way to go, but the javelin guy told me a 7 cell spectre is the way to go especially since I've had some landing problems. Which would you go with if you're coming off student status, not the greatest canopy pilot and only have had 3 stand up landings.....


justinb138  (B 28762)

May 11, 2006, 11:17 AM
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

That's why PD has a demo program. Wink

I've flown a few different canopies, and I prefer 9 cells. Some people like 7 cells better.

Just try a few of each and get the one you like the best. Smile


mattjw916  (D License)

May 11, 2006, 11:18 AM
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

I'm not a big fan of the "put every girl under a Spectre" strategy that seems to be the popular answer.

Try demoing canopies and deciding what _you_ like. Personally I think 9 cells are easier to land and I don't the steep approach and slow turn rate of a Spectre. I started with a Sabre 2 loaded under 1:1 right off of student status and never had any real issues with it.

Think about trying the Silhouette too.


DJL  (D License)

May 11, 2006, 11:22 AM
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

Quote:
the javelin guy told me a 7 cell spectre is the way to go especially since I've had some landing problems.

I think the polevault guy would be a better source for discussing landings. Have you spoken to him yet?Tongue

Spectres are good but Demo or borrow a few canopies. Also, instead of trying to find something you can land, how about taking a course and learning to fly better? If at 27 jumps you've resigned to thinking that your piloting skills will never improve then you have bigger problems.


phoenixlpr  (D 3049)

May 11, 2006, 11:40 AM
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

Try everything that you safely can.

Make up your own mind! I've choosen my platform because I've thought so not because someone would've told so.


Slurp56

May 11, 2006, 11:54 AM
Post #6 of 32 (2249 views)
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
the javelin guy told me a 7 cell spectre is the way to go especially since I've had some landing problems. Which would you go with if you're coming off student status, not the greatest canopy pilot and only have had 3 stand up landings.....

Nobody coming off of student status is a landing pro, dont let that affect your decision on a canopy. How do you think the rest of us learned to PLF? Laugh

Use the rental gear with a light wing loading for a while until you get the hang of it. Then look at demoing some canopies.


tso-d_chris

May 11, 2006, 11:59 AM
Post #7 of 32 (2245 views)
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
Agh... still trying to figure out this rig, parachutes ect.

I want something docile, something I can land easily

I'm jumping a 9 cell navigator right now and trying to buy my first rig... some people tell me 9 cell is the way to go, but the javelin guy told me a 7 cell spectre is the way to go especially since I've had some landing problems. Which would you go with if you're coming off student status, not the greatest canopy pilot and only have had 3 stand up landings.....

Don't be discouraged by minor landing problems with your number of jumps. You have likely jumped several canopies already, and they all have had slightly different flight characteristics. It's not realistic for you to expect to have your landings dialed in yet.

Don't get too caught up with 7 cell vs. 9 cell. Demo different canopies. You may like a nine cell best, or you may like a seven cell best. It is unlikely that will be the reason for your preference.

The Spectre is typically a very good choice for a first canopy. At lower loadings, it can be docile. It nonetheless has a performance envelope large enough to keep a fledgling canopy pilot busy learning for several hundred jumps or more.

Another canopy that is often overlooked, but is also good at approprite loadings is the Silhouette. It is often not considered because it only has a ZP top skin, rather than being built entirely of zero porosity fabric. However, it is on the top skin that ZP fabric offers the largest benefit. Since the Silhouette is not totally zero P, it is easier to pack, offers a lower pack volume. It can also be fun to fly.

Other canopies to consider, in no particular order, are the Lotus, Sabre2, Safire2, Pilot, and Triathlon. This list, of course is not all inclusive.

I hope this helps.


(This post was edited by tso-d_chris on May 11, 2006, 12:01 PM)


ChrisL  (C 35323)

May 11, 2006, 12:56 PM
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Re: [DJL] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
I think the polevault guy would be a better source for discussing landings. Have you spoken to him yet?Tongue

.

On the subject of hitting the ground really hard I always defer to the shot put guy myself.


DJL  (D License)

May 11, 2006, 1:42 PM
Post #9 of 32 (2173 views)
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Re: [ChrisL] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
In reply to:
I think the polevault guy would be a better source for discussing landings. Have you spoken to him yet?Tongue

.

On the subject of hitting the ground really hard I always defer to the shot put guy myself.

No, no, no! He's for the groundlaunch camp.


caspar  (A 105169)

May 11, 2006, 1:57 PM
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

i just came back from perris (i live in the UK). i had 49 jumps when i went there thinking, i dont think i'll have the skill to tell the difference between canopies for ages but i did the demo program anyway....to say it helped would be an understatement. i tried them all for sizes 190-170 and can order my preferences now. definitely do a demo program - its like AFF, you wont regret spending the money doing it.

definitely check out the safire 2 at some point.


mjosparky  (D 5476)

May 11, 2006, 9:22 PM
Post #11 of 32 (2073 views)
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Re: [tso-d_chris] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
Another canopy that is often overlooked, but is also good at approprite loadings is the Silhouette.

The Silhouette is probably the best kept secret in skydiving. A great general use canopy.

http://www.performancedesigns.com/silhouette.asp


(This post was edited by mjosparky on May 11, 2006, 9:24 PM)


ROK  (D 30092)

May 12, 2006, 4:23 AM
Post #12 of 32 (2019 views)
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
Agh... still trying to figure out this rig, parachutes ect.

I want something docile, something I can land easily

I'm jumping a 9 cell navigator right now and trying to buy my first rig... some people tell me 9 cell is the way to go, but the javelin guy told me a 7 cell spectre is the way to go especially since I've had some landing problems. Which would you go with if you're coming off student status, not the greatest canopy pilot and only have had 3 stand up landings.....

I too started out with a Navigator and thought that I would stick with a 9 cell. I tried a Spectre one day and really really liked it. A little later I tried a Triathlon and found that I felt more in control of my landings. The canopy just seemed to become an extension of my body. I love the way it lands, but I'm still dealing at times with flaring unevenly, which by the way, makes for great PLF practice Unsure


Joellercoaster  (D 105792)

May 12, 2006, 4:35 AM
Post #13 of 32 (2013 views)
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Re: [caspar] 7 cell vs. 9 cell [In reply to] Can't Post

Definitely agree with all the people saying "demo them!"

As a fellow beginner, I don't think one style of canopy is necessarily easier to learn to land than the other - it seems to vary completely from person to person.

I tried seven- and nine-cell canopies in similar sizes a little bit, and found nine-cells much easier to judge the landings on (shallower glide angle). Your mileage will almost certainly vary from mine and everyone else's, so go try stuff!

Besides, demoing things is fun.


riggerrob  (D 14840)

May 12, 2006, 9:08 AM
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Re: [Joellercoaster] 7 cell vs. 9 cell [In reply to] Can't Post

The biggest advantage of 9-cells is their larger "sweet spot" for flaring.


wightout  (B 29019)

May 12, 2006, 9:45 AM
Post #15 of 32 (1936 views)
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

I've been watching your thread's with interest this past week. We are at about the same point with our jumping and I have many of the same questions as you...so thanks for saving me having to do a lot of posts! Smile

While obviously I'm no expert, I am having some of the same issues. I have stood up several more than 3 landings, but not many. I was flying a Spectre, and it was bringing me in so steep, I was having trouble gauging the ground, when to flare, etc...it was just too scary for me! I had several HARD landings, one including tearing my quad muscle and making my knees look so black and blue everyone at the DZ was in pain for me!! Unsure

I went to a navigator last weekend and had my first "tiptoe", perfect landing! The only landing I PLF'd was when the wind totally died, and it wasn't that hard of a PLF, just lost my footing.

I don't know if I'll buy a Navigator, my DZO told me they are hard to re-sell since they are ZP and F-111, but I sure liked how I could find the sweet spot in the flare when I practiced up @ 3,000'. It made for several REALLY nice landings for the weekend!!

Overall, I like how the 9 cell's have a "not so steep" landing, for us gurls who get a little more scared coming at the ground so fast. (Someone told me that is typical with women skydivers...it sure it a reality for me!)

Good luck and let us all know what you end up with, but like everyone else said, I'm trying a LOT of different stuff now!! It adds to the fun!! Smile


justinb138  (B 28762)

May 12, 2006, 9:55 AM
Post #16 of 32 (1932 views)
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Re: [wightout] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
I went to a navigator last weekend and had my first "tiptoe", perfect landing! The only landing I PLF'd was when the wind totally died, and it wasn't that hard of a PLF, just lost my footing.

I don't know if I'll buy a Navigator, my DZO told me they are hard to re-sell since they are ZP and F-111, but I sure liked how I could find the sweet spot in the flare when I practiced up @ 3,000'. It made for several REALLY nice landings for the weekend!!

The Silhouette (mentioned above), flies similar to a Navigator if I remember correctly. I've got one, but I haven't flown a Nav in so long I can't really compare the two. They don't have the resale value of something like a Sabre2, but they're much easier to pack. Wink

(And the waiting list for a demo is probably much shorter than most other PD canopies).


Darius11  (C License)

May 12, 2006, 12:50 PM
Post #17 of 32 (1886 views)
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Re: [justinb138] 7 cell vs. 9 cell [In reply to] Can't Post

I was under the impression that the Silhouette and Nav are the same canopy just when the sizes get big they call it a Navigator, but what do I know.

There is great advice here demoing is cheep last time I demoed from PD it cost like 30 bucks plus return shipping witch was like 15.00 by UPS. You get the canopy for two weeks and can put a boatload of jumps on it.


Take a canopy control course you would be surprised at how much a good couch and video improve your landings.

Good luck


mjosparky  (D 5476)

May 12, 2006, 1:01 PM
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Re: [Darius11] 7 cell vs. 9 cell [In reply to] Can't Post

Not, see attachment.
Attachments: PD Navigator wing load chart.doc (56.0 KB)


3331  (D 3331)

May 12, 2006, 8:10 PM
Post #19 of 32 (1828 views)
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

Take a look at the Firebolt from http://www.jumpshack.com/portal/ it's a real elliptical nine cell.

You get soft openings and easy landings.


(This post was edited by 3331 on May 12, 2006, 8:20 PM)


adventurechick  (C 35899)

May 12, 2006, 8:20 PM
Post #20 of 32 (1824 views)
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Re: [3331] 7 cell vs. 9 cell [In reply to] Can't Post

That page isn't loading up for some reason


mjosparky  (D 5476)

May 12, 2006, 10:48 PM
Post #21 of 32 (1813 views)
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Re: [3331] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
it's a real elliptical nine cell.

Do you think a fully elliptical canopy is the right choice for someone with 27 jumps?


trippin  (A 12345)

May 13, 2006, 4:59 AM
Post #22 of 32 (1793 views)
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

I found the 9 cells easier to land, ended up getting a pilot 188, its docile and easy to fly.It also made learning to pack easier with its colored tabs.


3331  (D 3331)

May 13, 2006, 6:34 AM
Post #23 of 32 (1783 views)
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Re: [adventurechick] 7 cell vs. 9 cell [In reply to] Can't Post

In reply to:
That page isn't loading up for some reason

Try the link again, I just fixed it.


(This post was edited by 3331 on May 13, 2006, 6:35 AM)


Avion  (Student)

May 13, 2006, 7:04 AM
Post #24 of 32 (1777 views)
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Re: [Darius11] 7 cell vs. 9 cell [In reply to] Can't Post

As I have been told, the Navigator is a beef up version of a Silhouette, for student training. They're both based on the same design.

The 240 Navigator is thus the heavy duty student equivalent of a 230 Silhouette.

Before I learned about this, I thought I want to buy a Navigator, and called up some places looking for prices. I was told only DZOs buy them because they cost more than a regular consumer canopy.

Why buy a canopy that will stand up to 5000 jumps, if you're only going to put 200-300 jumps on it before getting a smaller one?

Cheers,

BW


riggerrob  (D 14840)

May 13, 2006, 7:47 AM
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Re: [wightout] 7 cell vs. 9 cell [In reply to] Can't Post

I don't know if I'll buy a Navigator, my DZO told me they are hard to re-sell since they are ZP and F-111,

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Will someone please explain this logic to me?

I normally do 8 or 10 jumps per day on a SET400, that is half-and-half. Hybrid canopies are easy to pack and easy to land, which is why the majority of modern school canopies have ZP top skins, but F-111 ribs and bottom skins.
What is wrong with that configuration?


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