Misloading of the risers

[base698]

I had a slight spin on opening on a static line (about 1/4 of line twist). After review of video one hand was on the left rear riser and the other shoulder was slightly dipped. The canopy appeared to be more loaded on the left side due to the lines looking more taught in one of the frames. Anyway I opened and spun slightly to the right. Wind was also slight and from the right.

My questions are: On slider down jumps is body position is much more crucial because of the "hardness" of the opening (ie you are more prone to get spun into line twists). I've always thought that the case.

And given the scenario is that the direction I should have turned?

[imported_Tom Aiello]

>The canopy appeared to be more loaded on the left side

What was the opening heading.

>Anyway I opened and spun slightly to the right. Wind was also slight and from the right.

Is that your body, or the canopy that spun right?

It seems odd that you spun right, with the left riser loaded first. I would think that would spin you to the left.

>On slider down jumps is body position is much more crucial because of the "hardness" of the opening (ie you are more prone to get spun into line twists).

I would suspect so. However, I have no real data to support this.

>And given the scenario is that the direction I should have turned?

I'm confused here. Are you talking about the rotation of your body or the direction of the canopy turn you initiated after inflation?

--Tom Aiello
tbaiello@mac.com

[BaseFetish]

Chew on this:

Body position might affect a slider up jump more, because of the fact of the slider holding the lines closer together and closer to the canopy for a longer period of time at line stretch. Almost like a pyramid flipped upside down and trying to balance on that point. It is more susceptable to input.

Where a slider off jump, the distance of the lines is further apart on opening (line stretch), effectively stabilizing the canopy.

Assuming you could use the same pack job twice.


Or not.

basefetish

[base698]

It was my body that spun to the right. At first I thought the canopy moved but it didn't.

[dexter]

Did you read my post in the "folding the nose" thread? You can find my hypothesis regarding the difference between slider up and down deployments. I think you might be trying to say what I stated there. However, I was referring to input from above the slider, NOT body position.

Body position is the biggest cause of off heading openings regardless of the position of the slider.

When you referred to an upside down pyramid, are you saying your packjobs are that shape? I know the flat pro-pack method I use in BASE (manfacturer reccomended method) has ABSOLUTELY no resemblance to a pyramid shaped skydiving pro-pack.

Stay safe out there! ---Dex
dexterbase@hotmail.com

[imported_Tom Aiello]

Does anyone else have any thoughts on this?

I can make good arguments both ways (body position is more important slider up and body position is more important slider down).

I'd love to here other people's ideas.

--Tom Aiello
tbaiello@mac.com