G-force in canopyflying

[Sabrekakkonen 0]

Are there information about amount of g-force when sprialing agressively?
Sabre 2 150sqft with common wl for this canopy?
Valkyrie 67 with common wl for this canopy?
How big is g-force diffrence between these canopies?

[billvon 3,028]

>Sabre 2 150sqft with common wl for this canopy?
>Valkyrie 67 with common wl for this canopy?

The Sabre 2 will generate 1.6G's with 2 inches of toggle deflection; the Valkyrie will generate 3.1G's with 2 inches of toggle deflection. Guaranteed.

Well, not really. There are far too many variables, including:

Wingloading
Altitude
Drag of jumper
RDS/stowed slider/unstowed slider
Type of pilot chute
Line type

Etc etc. All of which means it's going to be impossible to determine any empirical formula for how many G's you are pulling.

On the other hand, if you know the # revolutions per minute and the diameter of the circular path your body is describing, it's pretty easy to figure out from there.

[rmarshall234 14]

I love it.....

Or...., strap a surplus G meter (from an airplane or elsewhere) on your belly and go find out. Of course, we want to know the results of your test...

[Stumpy 284]

billvon

>Sabre 2 150sqft with common wl for this canopy?
>Valkyrie 67 with common wl for this canopy?

The Sabre 2 will generate 1.6G's with 2 inches of toggle deflection; the Valkyrie will generate 3.1G's with 2 inches of toggle deflection. Guaranteed.

Well, not really. There are far too many variables, including:

Wingloading
Altitude
Drag of jumper
RDS/stowed slider/unstowed slider
Type of pilot chute
Line type

Etc etc. All of which means it's going to be impossible to determine any empirical formula for how many G's you are pulling.

On the other hand, if you know the # revolutions per minute and the diameter of the circular path your body is describing, it's pretty easy to figure out from there.

Wasn't there an incident/fatality with someone blacking out under a spinning mal on a tiny canopy some time back?
So in answer to the OP - a LOT in the right(wrong) circumstances

Never try to eat more than you can lift

[Pobrause 6]

http://www.dropzone.com/cgi-bin/forum/gforum.cgi?do=post_view_flat;post=1321270;page=1;sb=post_latest_reply;so=ASC;mh=25;

It doesn't need 21 sqft spinning to black out, though. There have been suspected cases with canopies a lot bigger.

Bill is right, though. Way too many variables to give a specific answer. Even if you measure it for a specific case with specific toggle input/WL/setup ect, the next malfunction may create a completely different set of data...

-------------------------------------------------------

To absent friends

[chuckakers 426]

Stumpy

Wasn't there an incident/fatality with someone blacking out under a spinning mal on a tiny canopy some time back?
So in answer to the OP - a LOT in the right(wrong) circumstances

My guess is there have been numerous incidents of blackouts from spinning mals.

We lost a friend in Texas after he blew a brake line on deployment and his elliptical took off like a top. He spun very fast for 1,000 feet before chopping and failed to pull his reserve ripcord. No RSL. A review of a video clip showed him making 3 full revolutions in just 2 seconds moments after deployment and witnesses said the spin continued until the chop. We think the spin disoriented him so badly that he struggled to cutaway and was likely either out after that or so close to out that he could not deploy his reserve.

This is one reason I discourage people from screwing around with spinning mals. It's possible to be ok one moment and struggling to stay conscious the next. If it spins fast, chop it fast.

Chuck Akers
D-10855
Houston, TX

[JohnMitchell 16]

And another good reason that I advocate RSLs.