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Blahr

Riser Length

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I'm looking over the order form for a Vector III M
and one of the questions is riser length.

Options are:

19"
21"
23"

What needs to be considered when choosing one of these? Is there a standard? I'm unclear what effect shorter or longer risers will have.


Chris

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What needs to be considered when choosing one of these? Is there a standard? I'm unclear what effect shorter or longer risers will have.



From my experience (FS only) your ability to reach your slider if you want to collapse it. I'm 5ft 4in and have 20in risers. Any longer and I wouldn't be able to collapse my slider.

There may be some CRW reasons too, but I don't know about that (yet!)

tash
Don't ever save anything for a special occasion. Being alive is a special occasion. Avril Sloe

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It will affect your flare is the biggest difference. Longer risers will give you a deeper stroke and more flare to work with because you are placing the canopy further away from you. Shorter risers will decrease the stroke.

20" is pretty much the standard. 18" risers are generally used by short people with very short arms and 22" or larger are used by people with longer arms.

If you're of average build, I'd get the 21's.

When you start getting into highly-loaded, very small canopies, the riser length will also have a noticable impact on canopy flight as the larger risers will allow the canopy to, desireably, spread out a bit more.
Sky, Muff Bro, Rodriguez Bro, and
Bastion of Purity and Innocence!™

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When I ordered my Vector, I got the 19" risers (because I'm pretty short). When I put them on my canopy (Triathlon 135) I suddenly had less flare than I had before. When I went to a smaller canopy (Triathlon 120) the poor flare was even more noticeable, so I put 23" risers on it and it made a big difference. Now I have to really stretch to collapse my slider, but the better flare is worth it.

Of course there's more to flare power than the riser length (like the length of your brake lines), but it did make a difference for me (and let me point out that I am NOT an expert ;-) Most of my experience is on Triathlons, so this may be different on other canopies... You may want to contact the manufacturer of your canopy and ask them if they have a recommended riser length that works best with your canopy. (Aerodyne was very helpful to me regarding this.)

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How tall are you? That can make a big difference.

I have 1000'a of jumps on 18 inch risers. I've jumped all sizes and my favorites are 19's. I'll be making a set as soon as my new grommet smasher shows up.

I'm 5'6" and I collapse my slider and pull it down behind my head. If you plan to do that, make sure you can reach it.

If I were 6 foot, I'd prolly go with 20's or 21's (21 given the choices you've posted)

As far as flaring, after a few jumps it's all good. It won't make that much of a difference.

Hope that helps
Tim
My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto

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How tall are you? That can make a big difference.



I'm 5' 11" . Maybe the 21" ones would be best for me.

Hmmm, I'll talk to the folks when I order it and ask what the recommend based on my measurements.

Thanks :-)

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Call the manufacturer.

Normally the primary consideration is that they fit with the rig. Anything shorter and you could do serious damage. Modifying this for the benefit of extra "flare power" may be a good thing if it fits into the overall scheme of things -- but remember the primary consideration is to fit the rig.
quade -
The World's Most Boring Skydiver

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Call the manufacturer.

Normally the primary consideration is that they fit with the rig. Anything shorter and you could do serious damage.



Why do you say it will cause damage? I have lots of practical experience with short risers and they terminate no where's near the bottom of the reserve tray. Is that what' you're talking about?

===


Blahr... I agree with your choice of 21's. I think you'll be very satisfied. The only reason I would go shorter is if the 3 rings sit high in the shoulders. The Vectors are placed nicely.

Tim
My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto

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That's exactly what I'm taking about.

And, to be clear, just because you're not having a problem doesn't mean that someone else wouldn't. My guess is that you're jumping a fairly small reserve too? No?
quade -
The World's Most Boring Skydiver

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I'm but one person out of many I personally know with this set up. I'll attemp to take note of this this weekend as well. The only time I've seen any trouble was on a Rig where the Reserve pack tray was miss sewn to the back pad and allowed the lines to get under a corner. Several lines broke JUST above the connector links. The set up was stock from the factory. The other instances on large and small rigs were people pulling on their backs. The reserve tray ripped off the back pad. Extraordinary circumstances.
My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto

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The container manufactur will give you the riser they think will fit you the best based on your height. If you have really short risers and you are really tall it may stall the canopy on landing. Trust the manufactur to get you the right risers. If you have an odd body where your arms are really long or short then you may want to try a different size. Like Quade said ask the manufactur or the person selling you the gear and they will make sure you get the right length. People may have different opinions about this but it is best to ask and trust the people who do this for a living.
Dom


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If you have really short risers and you are really tall it may stall the canopy on landing



Incorrect. Since shorter risers affectively reduce the amount you can pull the toggles down, the chances are decrease, not increased.

If you flare blindly and hope for the best then you are asking for trouble. Flying a parachute is very dynamic so please think of it that way.
My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto

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If you have really short risers and you are really tall it may stall the canopy on landing.



A shorter riser moves the guide ring closer to you, effectively reducing the amount of flare you get...not increasing it.


"...and once you had tasted flight, you will walk the earth with your eyes turned skyward.
For there you have been, and there you long to return..."

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