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Forums: Skydiving Disciplines: Swooping and Canopy Control:
minimum weight question...

 

 


Darktreader

United States
Jumps
License
In sport
: 81
: B 32103
: 1 years


Jul 23, 2008, 8:15 PM

Post #1 of 9 (493 views)

Registered: Nov 13, 2007
Posts: 287

minimum weight question... Can't Post

Had a wierd question pop up wanting to know whats the minimum wingloading/wieght for large to midsized canopys...is there a graph or chart online somewhere to check out this information? Just wondering at what low wingloading does it become unsafe or does it not matter?


rhys

Australia
Jumps
License
In sport
: 4600
: D 107
: 6 years


Jul 23, 2008, 8:39 PM

Post #2 of 9 (479 views)

Registered: Dec 2, 2002
Posts: 1992

Re: [Darktreader] minimum weight question... [In reply to] Can't Post

My 50KG/120LB Fiance learned on a 360sq/ft canopy. though she landed well after the tandems and had to jump in very light winds it didn't really matter, the size of the student container would have been more of a safety issue.

The biggest concern with large, lightly loaded canopies is Wind!! You don't want to be flying backwards.


skydemon2

United States
Jumps
License
In sport
: 1400
:  
: 13 years


Jul 23, 2008, 8:43 PM

Post #3 of 9 (478 views)

Registered: Jan 14, 2005
Posts: 5005

Re: [Darktreader] minimum weight question... [In reply to] Can't Post

Yeah everyone lists max. weight but not min. you would think there would be a point were not enough weight on the canopy would be dangerous.


packing_jarrett


Jumps
License
In sport
: 1500
: D 
: 3 years


Jul 23, 2008, 11:03 PM

Post #4 of 9 (456 views)

Registered: Nov 27, 2004
Posts: 685

Re: [rhys] minimum weight question... [In reply to] Can't Post

dude I watch light people doing solos on the tandem rigs and watch the end cells collapse and reinflate. Thats kind of scary.


dragon2

Netherlands
Jumps
License
In sport
: 1400
: D 101989
: 8 years


Jul 23, 2008, 11:42 PM

Post #5 of 9 (447 views)

Registered: Aug 8, 2001
Posts: 4054

Re: [Darktreader] minimum weight question... [In reply to] Can't Post

I did 50 jumps at a wingload of .45, I was fine Wink


AggieDave

United States
Jumps
License
In sport
: 2400
: D 
: 8 years


Jul 24, 2008, 2:17 AM

Post #6 of 9 (427 views)

Registered: Feb 26, 2001
Posts: 34019

Re: [skydemon2] minimum weight question... [In reply to] Can't Post


Quote
Yeah everyone lists max. weight but not min. you would think there would be a point were not enough weight on the canopy would be dangerous.


When you get to about .4 and below you start underloading the canopy to the point that it stops functioning as a ram-air and is just a giant square looking round. You can turn this way or that, but you're pretty much coming down like a round.


Chubba


Jumps
License
In sport
: 40
: A 10160
: 1 years


Jul 24, 2008, 4:06 AM

Post #7 of 9 (412 views)

Registered: Feb 9, 2008
Posts: 368

Re: [rhys] minimum weight question... [In reply to] Can't Post


Quote
The biggest concern with large, lightly loaded canopies is Wind!! You don't want to be flying backwards.

Definitely, I nearly had a heart attack on an AFF jump, massive student canopy with high winds.

Setup my final earlier @ 600ft directly above the treeline. Dropped me directly down, landed probably ~15ft in front of the tree's.


Darktreader

United States
Jumps
License
In sport
: 81
: B 32103
: 1 years


Jul 24, 2008, 2:17 PM

Post #8 of 9 (335 views)

Registered: Nov 13, 2007
Posts: 287

Re: [AggieDave] minimum weight question... [In reply to] Can't Post

thanks guys I think this answers the questions....a few people I know where loading at approx... .5 to .6 and the question arose at what point is the canopy under loaded and as you all saw as I did only maximum loadings where listed and min. loadings were varies with conditions, but I made the assumtion that at "some" point a canopy has to be under loaded and become a risk. thanks


padu

United States
Jumps
License
In sport
: 1300
:  
: 14 years


Jul 25, 2008, 8:12 AM

Post #9 of 9 (269 views)

Registered: Apr 13, 2002
Posts: 98

Re: [Darktreader] minimum weight question... [In reply to] Can't Post

In the DZ I used to jump, there was this skinny girl jumping on student gear that was prohibited from jumping on hot or windy days.... the problem with hot is that in order to get to the landing point, you need to go over a large patch of asphalt, and when she went over it, the parachute would climb up...

 
 
 


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