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Forums: Skydiving Disciplines: Swooping and Canopy Control:
Canopy Downsizing Chart by Brian Germain

 
 


BrianSGermain

United States
Jumps
License
In sport
 		: 14000
: D 11154
: 24 years


Jan 27, 2009, 3:42 PM

Post #1 of 11 (4923 views)

Registered: Apr 15, 2002
Posts: 590
Canopy Downsizing Chart by Brian Germain Can't Post
Many folks believe that we need better guidelines for canopy downsizing. I have spent a great deal of time putting together a chart for exactly that purpose, along with 21 pages of ideas that make sense of the chart.

Here is the link:

http://www.bigairsportz.com/pdf/bas-sizingchart.pdf


(This post was edited by ianmdrennan on Jan 29, 2009, 1:10 PM)


frost

United States
Jumps
License
In sport
 		: 3400
: D 25011
: 9 years


Jan 27, 2009, 7:32 PM

Post #2 of 11 (4861 views)

Registered: Apr 8, 2001
Posts: 1300
Re: [BrianSGermain] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
Thank you! This should be a locked sticky for all future new jumpers.


Premier ianmdrennan
Moderator
United States
Jumps
License
In sport
 		: 2800
: D 25821
: 12 years


Jan 27, 2009, 7:48 PM

Post #3 of 11 (4852 views)

Registered: Mar 19, 2002
Posts: 5343
Re: [frost] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
Suggestion noted Wink


rmarshall234


Jumps
License
In sport
 		: 3500
: D 
: 20 years


Jan 28, 2009, 8:01 AM

Post #4 of 11 (4759 views)

Registered: Apr 19, 2004
Posts: 68
Re: [BrianSGermain] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
AWESOME!

I haven't digested it all yet but what a nice piece of work. Also, kudos for having the guts to do what needs to be done. Thank you.


BrianSGermain

United States
Jumps
License
In sport
 		: 14000
: D 11154
: 24 years


Jan 28, 2009, 10:34 AM

Post #5 of 11 (4717 views)

Registered: Apr 15, 2002
Posts: 590
Re: [rmarshall234] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
If you look at the numbers carefully, you will see that the wingloading recommendations are not linear. Smaller canopies match you with a somewhat lighter loading, while big ones suggest a heavier load, to reflect the non-linear nature of scale effects.


dragon2

Netherlands
Jumps
License
In sport
 		: 1700
: D 101989
: 8 years


Jan 28, 2009, 1:56 PM

Post #6 of 11 (4675 views)

Registered: Aug 8, 2001
Posts: 4634
Re: [ianmdrennan] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
This should also be a sticky: Downsizing Checklist By Bill von Novak


Cornholio

United States
Jumps
License
In sport
 		: 500
: D 
: 8 years


Mar 12, 2009, 6:41 PM

Post #7 of 11 (3833 views)

Registered: Feb 26, 2002
Posts: 2735
Re: [BrianSGermain] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
Sweet!! According to the chart at exit wt 235 (don't laugh) and 500+ jumps, I should be jumping between a 150 and 139.

Kidding aside, I'm very happy with my 190 and have no plans to downsize anytime soon. However, much thanks Brian for putting that together. That should help a lot in helping the young (and stupid) from jumping a canopy that's too small for them.


GLIDEANGLE

United States
Jumps
License
In sport
 		: 460
: C 37739
: 2 years


Mar 13, 2009, 8:00 PM

Post #8 of 11 (3683 views)

Registered: Jan 1, 2007
Posts: 533
Re: [Cornholio] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
I think you misunderstand the chart. The chart is describing the MINIMUM canopy size.

Note the following direct quote from the chart:

*Jumpers are welcome to use a larger parachute than the chart suggests.


Hausse

United States
Jumps
License
In sport
 		: 1
: C 1
: 1 years


Mar 15, 2009, 9:37 PM

Post #9 of 11 (3539 views)

Registered: Aug 10, 2007
Posts: 1241
Re: [GLIDEANGLE] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
Gllideangle, I think you misunderstand ironyWink


jf951

United States
Jumps
License
In sport
 		: 74
: Student 
: 1 years

Mar 25, 2009, 9:03 PM

Post #10 of 11 (3299 views)

Registered: Mar 23, 2009
Posts: 64
Re: [Hausse] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
HOLY HELPFUL!!!!
ur awesome!!!


EXTremeWade

United States
Jumps
License
In sport
 		: 650
: D 29835
: 7 years


Mar 26, 2009, 5:51 AM

Post #11 of 11 (3257 views)

Registered: Nov 15, 2005
Posts: 276
Re: [jf951] Canopy Downsizing Chart by Brian Germain [In reply to] Can't Post
Awesome..I really am impressed. Brain, do you have a degree in AE?

wade

 
 
 


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