quade 4 #1 August 14, 2003 I believe this is a trick question, so be forewarned. Define "Riser Length".quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
diablopilot 2 #2 August 14, 2003 IMO the length from the top of the riser to the medium ring attachment point. At least that's the way I measure them.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
quade 4 #3 August 14, 2003 QuoteAt least that's the way I measure them. And is that the way that all manufacturers (well, the most common ones we have in the U.S. at least) measure them?quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
diablopilot 2 #4 August 14, 2003 I thought so, but I guess I'd have to check to be sure. RWS publishes a guide on riser manufacture. I'd say that would be "THE" source.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
quade 4 #5 August 14, 2003 RWS would be "A" source, but it's my understanding that there is no set definition as to how it's actually measured. That it can and does vary depending on the company in question. I don't have access to as much material as I'd like to check this out. Maybe you could do a spot check of say, RWS, Sun Path and . . . I dunno, maybe a couple others if you have the material.quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
diablopilot 2 #6 August 14, 2003 Sorry I should have said the since RWS has published the most technical guide, they would be "MY" source of information. On the othere hand I prefer another manufactures riseres. Where is Bill Booth when you need him?---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
riggerrob 643 #7 August 15, 2003 Most manufacturers measure risers from the top to the bottom of where the riser wraps around the middle ring. On the other hand, Flying High Manufacturing measures from the top to the "crotch." Quote Share this post Link to post Share on other sites
mjosparky 4 #8 August 15, 2003 Paul, As long as they are long enough to reach up to the lines they should be ok. lol SparkyMy idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
quade 4 #9 August 15, 2003 Ah, well, Sparky, that's not my concern at all. The issue comes up in my mind sometimes when I hear people saying things like, "Oh, you need ___ length risers because those ___ are too short/long" and of course, they're not taking into account that there doesn't appear to be any standard as to how they're measured to begin with. My current understanding is that, in the absence of specific instructions otherwise, risers are sized to a container size -- specifically, the length that would allow them to clear the bottom of the reserve pack tray. I understand why somebody with disproportionately sized arms might want or need different lengths, but I'm at a loss to understand how the average person, on an average size canopy would benefit in any meaningful way from risers only say, two inches longer. Certainly, if you're talking about very high performance and very small canopies every minor tweak is important, but the average skydiver? Really?quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
mjosparky 4 #10 August 15, 2003 Paul, I think the only consistent measurement is form the top down to the control line ring. This is need to make the brake setting the same from rig to rig. SparkyMy idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
quade 4 #11 August 15, 2003 Yep, 4 inches per PIA TS-100. So, that's why I think it's a trick question and question the validity of some advise I hear.quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
PhreeZone 20 #12 August 15, 2003 Brake setting on opening, but different length risers alter the apparent brake and flare points for jumpers. Longer risers mean that the flare point is closer to the canopy compaired to short risers where the flare point now seems to be further from the canopy. Granted the points are still X away from the canopy, but different riser length makes it appear to be different to the jumper. This can be nice for people that have taken in as much of their brakes as possible and still can't stall their canopy since adding longer risers fixes the issue, or if some one is easly stalling their canopy and have let the brakes out all the way different risers might fix the issue.Yesterday is history And tomorrow is a mystery Parachutemanuals.com Quote Share this post Link to post Share on other sites
mjosparky 4 #13 August 15, 2003 The flare point will always be the same distance from the canopy. The change will be where you hands are in relation to your body. SparkyMy idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
PhreeZone 20 #14 August 15, 2003 Exactly.. the percieved flare point will be different.Yesterday is history And tomorrow is a mystery Parachutemanuals.com Quote Share this post Link to post Share on other sites
mjosparky 4 #15 August 15, 2003 QuoteYep, 4 inches per PIA TS-100. So, that's why I think it's a trick question and question the validity of some advise I hear. You should question the validity of most of what you hear. SparkyMy idea of a fair fight is clubbing baby seals Quote Share this post Link to post Share on other sites
bmcd308 0 #16 August 15, 2003 I am a below-average skydiver in terms of ability, but an above-average skydiver in terms of arm length and height. I asked for longer risers when I had my container made for a couple of reasons - first, I wanted to be able to move my brake settings down so that I would not have to deal with bucking in front riser turns, something Hornets are known for when the brakes are set at the dot. So with longer risers, I could have my brakes set lower but still get a full flare. That being said, can you see anything dangerous about longer than normal risers (within reason)? I don't really see why they would be more likely to snag on the container than an individual line. Brent ---------------------------------- www.jumpelvis.com Quote Share this post Link to post Share on other sites
quade 4 #17 August 15, 2003 Quote That being said, can you see anything dangerous about longer than normal risers (within reason)? I don't really see why they would be more likely to snag on the container than an individual line. I personally think there's an added risk in risers that don't reach the bottom of the reserve pack tray, but as for risers significantly (a couple inches) longer than that I can't say. My question (one I've been asking myself for a few months now) doesn't have so much to do with additional risk associated with longer than required risers, but rather "The Magic Feather" effect of such a recommendation. As I've said before, I think it is an appropriate recommendation for in some circumstances. I just don't think it's required as often as I've heard it recommended.quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
