lowpullin1 0 #1 November 5, 2004 Anyone know where i can find those extra large sliders with the 3 kill lines? "It's hard to fly with the eagles when you are surrounded by turkeys." My Website Quote Share this post Link to post Share on other sites
diablopilot 2 #2 November 5, 2004 For what? A larger slider can often produce harder openings.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
gus 1 #4 November 5, 2004 Quotehows that...? Because when the canopy first comes out of the bag its inflated span is restricted by the span (width) of the slider. A bigger (wider) slider = less restriction on the opening canopy. Maybe. GusOutpatientsOnline.com Quote Share this post Link to post Share on other sites
riggerrob 558 #5 November 5, 2004 QuoteQuotehows that...? Because when the canopy first comes out of the bag its inflated span is restricted by the span (width) of the slider. A bigger (wider) slider = less restriction on the opening canopy. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> George Galloway (Precision Aerodynamics) said something similar: "When you install a larger slider, the canopy starts to inflate earlier, but it takes longer." Slider size is a delicate balance. Quote Share this post Link to post Share on other sites diablopilot 2 #6 November 5, 2004 QuoteBecause when the canopy first comes out of the bag its inflated span is restricted by the span (width) of the slider. Exactly. The extra width of bottom skin inflation that the larger slider may allow can over come the resistive force of airflow holding the slider up. I know of atleast a couple used canopies that had their openings tamed with smallersliders built to the manufacturers specs.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites henrik.anderson 0 #7 November 5, 2004 Here is my old original slider on top of my new original slider. This is for P de F s BT-Pro 140 :-) I know this is out of quote but its fun to see. Quote Share this post Link to post Share on other sites beezyshaw 0 #8 November 5, 2004 I've been involved in many, many test jumps to guage the effect of different sized sliders. If a slider is very small, the canopy is restricted in the early stage of deployment and the "snivel" stage is increased. This is because the line groups are held closely together during this stage. But once the canopy begins inflation, that same small slider has little "sail" area, so doesn't offer much resistance to sliding down the lines. So a very fast inflation occurs with a small slider. On the other hand, with a large slider, the line groups are allowed to separate more during the initial phase of deployment, which produces a very short "snivel" time, but the large sail area offers good resistance as the slider is coming down the lines. The problem is that when the slider is too large, the lack of sufficient "snivel" period causes an explosive opening and the large sail area is ineffective to the tremendous forces caused by the first stage of deployment. So, as was said earlier, it is indeed a delicate balance. And what works for one type of canopy doesn't necessarily work for a different canopy. Many people have the false impression that they can fix hard openings by installing a bigger slider. Sometimes it can help, but the best advice is consult your canopy manufacturer; they've tested many slider sizes and can probably give good guidance. Quote Share this post Link to post Share on other sites bch7773 0 #9 November 5, 2004 ok that makes sense. but out of curiousity, wouldn't putting a pocket on your slider slow down the opening on any canopy? why don't manufacturers just do that? MB 3528, RB 1182 Quote Share this post Link to post Share on other sites diablopilot 2 #10 November 5, 2004 Yes it can/does, how ever it is considered a band-aid type fix.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites RMURRAY 1 #11 November 5, 2004 after talking with MEL at the Icarus Service Centre, if I had a Sabre1 which opened hard, I'd get a dome slider from him. My DZO got one from MEL and it works like a charm --- I'd stay away from pocket sliders. Just my opinion. rm Quote Share this post Link to post Share on other sites skyhighkiy 0 #12 November 5, 2004 I asked the same to a friend of mine that test jumped for years. He said the problem with pocket sliders is that, at times, or if you have the wrong size, something, I don't remember exactly, the pocket will cause the slider to stay up way too long or you'll have to do a lot of 'pumping' of the brakes to get it down. BE THE BUDDHA! Quote Share this post Link to post Share on other sites linestretch 0 #13 November 5, 2004 i disagree, the pocket that was put on my sabre1 worked miracles. It may be a bandaid, but I don't give a shit. It openned like a champ after that.my pics & stuff! Quote Share this post Link to post Share on other sites hookitt 0 #14 November 5, 2004 QuoteYes it can/does, how ever it is considered a band-aid type fix. And your point is? -- diablopilot There's nothing wrong with pockets added to a slider on an unruly canopy. Quote Share this post Link to post Share on other sites diablopilot 2 #15 November 5, 2004 QuoteThere's nothing wrong with pockets added to a slider on an unruly canopy. Agreed. I was trying to adress the intent of the original question which I took to say "why don't manufacturers sell their canopies with a pocket slider?" I have seen, and even installed pocket sliders on many canopies with success. But they are typicaly a "band-aid" fix to a canopy that has problems, not the norm.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites peek 20 #16 November 5, 2004 All, FYI: http://www.pcprg.com/hardop.htm Quote Share this post Link to post Share on other sites hookitt 0 #17 November 5, 2004 Very cool. Pockets are cheap though My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto Quote Share this post Link to post Share on other sites Join the conversation You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. 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diablopilot 2 #6 November 5, 2004 QuoteBecause when the canopy first comes out of the bag its inflated span is restricted by the span (width) of the slider. Exactly. The extra width of bottom skin inflation that the larger slider may allow can over come the resistive force of airflow holding the slider up. I know of atleast a couple used canopies that had their openings tamed with smallersliders built to the manufacturers specs.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
henrik.anderson 0 #7 November 5, 2004 Here is my old original slider on top of my new original slider. This is for P de F s BT-Pro 140 :-) I know this is out of quote but its fun to see. Quote Share this post Link to post Share on other sites
beezyshaw 0 #8 November 5, 2004 I've been involved in many, many test jumps to guage the effect of different sized sliders. If a slider is very small, the canopy is restricted in the early stage of deployment and the "snivel" stage is increased. This is because the line groups are held closely together during this stage. But once the canopy begins inflation, that same small slider has little "sail" area, so doesn't offer much resistance to sliding down the lines. So a very fast inflation occurs with a small slider. On the other hand, with a large slider, the line groups are allowed to separate more during the initial phase of deployment, which produces a very short "snivel" time, but the large sail area offers good resistance as the slider is coming down the lines. The problem is that when the slider is too large, the lack of sufficient "snivel" period causes an explosive opening and the large sail area is ineffective to the tremendous forces caused by the first stage of deployment. So, as was said earlier, it is indeed a delicate balance. And what works for one type of canopy doesn't necessarily work for a different canopy. Many people have the false impression that they can fix hard openings by installing a bigger slider. Sometimes it can help, but the best advice is consult your canopy manufacturer; they've tested many slider sizes and can probably give good guidance. Quote Share this post Link to post Share on other sites
bch7773 0 #9 November 5, 2004 ok that makes sense. but out of curiousity, wouldn't putting a pocket on your slider slow down the opening on any canopy? why don't manufacturers just do that? MB 3528, RB 1182 Quote Share this post Link to post Share on other sites
diablopilot 2 #10 November 5, 2004 Yes it can/does, how ever it is considered a band-aid type fix.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
RMURRAY 1 #11 November 5, 2004 after talking with MEL at the Icarus Service Centre, if I had a Sabre1 which opened hard, I'd get a dome slider from him. My DZO got one from MEL and it works like a charm --- I'd stay away from pocket sliders. Just my opinion. rm Quote Share this post Link to post Share on other sites
skyhighkiy 0 #12 November 5, 2004 I asked the same to a friend of mine that test jumped for years. He said the problem with pocket sliders is that, at times, or if you have the wrong size, something, I don't remember exactly, the pocket will cause the slider to stay up way too long or you'll have to do a lot of 'pumping' of the brakes to get it down. BE THE BUDDHA! Quote Share this post Link to post Share on other sites
linestretch 0 #13 November 5, 2004 i disagree, the pocket that was put on my sabre1 worked miracles. It may be a bandaid, but I don't give a shit. It openned like a champ after that.my pics & stuff! Quote Share this post Link to post Share on other sites
hookitt 0 #14 November 5, 2004 QuoteYes it can/does, how ever it is considered a band-aid type fix. And your point is? -- diablopilot There's nothing wrong with pockets added to a slider on an unruly canopy. Quote Share this post Link to post Share on other sites
diablopilot 2 #15 November 5, 2004 QuoteThere's nothing wrong with pockets added to a slider on an unruly canopy. Agreed. I was trying to adress the intent of the original question which I took to say "why don't manufacturers sell their canopies with a pocket slider?" I have seen, and even installed pocket sliders on many canopies with success. But they are typicaly a "band-aid" fix to a canopy that has problems, not the norm.---------------------------------------------- You're not as good as you think you are. Seriously. Quote Share this post Link to post Share on other sites
peek 20 #16 November 5, 2004 All, FYI: http://www.pcprg.com/hardop.htm Quote Share this post Link to post Share on other sites
hookitt 0 #17 November 5, 2004 Very cool. Pockets are cheap though My grammar sometimes resembles that of magnetic refrigerator poetry... Ghetto Quote Share this post Link to post Share on other sites
