Colm 1 #1 December 17, 2013 I'm interested in fabricating some small-scale, model, ram air parachutes. Does anybody have any fabric templates for a 7-cell canopy design that they'd share? My goal is to make some miniature canopies, maximum a few feet wide, that I can do some aerodynamic experimentation on from rooftop drops. The model needn't faithfully replicate any particular brand, just so long as it pressurizes and flies under wing loading. Thanks! (I promise these experiments will not involve living animals or unwilling participants in any manner Quote Share this post Link to post Share on other sites IanHarrop 41 #2 December 17, 2013 I found this, its in french but... http://miztral.free.fr/www/index.php?option=com_content&view=article&id=12:flowform%20miztral&catid=14&Itemid=105"Where troubles melt like lemon drops, away above the chimney tops, that's where you'll find me" Dorothy Quote Share this post Link to post Share on other sites hypoxic_fool 0 #3 December 17, 2013 Also check out this guy's YouTube chanel. Step by step instructions, kinda. Quote Share this post Link to post Share on other sites Alexg3265 0 #4 December 17, 2013 I've made a few, complete with risers sliders and the like. The last one I made was an elliptical 7 cell, roughly 42" by 20". Look at a normal sized one and scale it down. I used f-111 from paragear, and matched it to my actual canopy. Figure out your wing shape and your topskin and lower skins will be more or less rectangles. The top skins will get wider near the thickest part of the canopy. I learned a lot just from making a few different designs. Playing with different brake settings, packing techniques, and all that can make it open now or snivel for 50 feet. My actual openings have improved and I taught my wife how to pack with my models. I feel like I have a better understanding of how it all works together and how each part interacts with each other. It flies and I had some videos and I'd take more pictures for you if it wasn't in a tree. I may be able to upload the videos later. When I get a chance I might be able to find my cardboard templates and send them to you. Oh and one more thing. 1:1 loading is not the same when it's scaled down. Mine flew best with about a pound and a half on it. Roughly .25:1I was that kid jumping out if his tree house with a bed sheet. My dad wouldn't let me use the ladder to try the roof... Quote Share this post Link to post Share on other sites Alexg3265 0 #5 December 17, 2013 Videos... http://youtu.be/db_jr83c2RM http://youtu.be/Z9z604cMwJwI was that kid jumping out if his tree house with a bed sheet. My dad wouldn't let me use the ladder to try the roof... Quote Share this post Link to post Share on other sites Quagmirian 40 #6 December 17, 2013 hypoxic_foolAlso check out this guy's YouTube chanel. Step by step instructions, kinda. Mihawkler? OP, I can put together some rough plans as a starting point if you would like them. Quote Share this post Link to post Share on other sites Pobrause 6 #7 December 18, 2013 Alexg3265Videos... http://youtu.be/db_jr83c2RM http://youtu.be/Z9z604cMwJw------------------------------------------------------- To absent friends Quote Share this post Link to post Share on other sites hypoxic_fool 0 #8 December 18, 2013 I thought I posted the link lol http://m.youtube.com/user/Thegibolin Quote Share this post Link to post Share on other sites hypoxic_fool 0 #9 December 18, 2013 Actually yes that is what I was referring to. Don't know why I thought different. Quote Share this post Link to post Share on other sites mr2mk1g 10 #10 December 18, 2013 If you're not truely modelling any particular brand, consider looking for a cheap 2nd hand power kite on e-bay or similar. After materials, time and arse ache you'd probably come out on top. Try looking for something 2-3m, maybe a Beamer or a Crossfire 2 by HQ. You'll also find lots of cheap 2-line ones which could be modded at minimal effort but a 4-line kite would almost match a canopy, albeit with probably bit a more extreme of an aspect ratio than you tend to see with canopies. Quote Share this post Link to post Share on other sites ineed2fly 0 #11 December 18, 2013 Kite wont work, as it is designed to fly with the tow points like 2-3' apart, if you put them right next to each other it will distort the canopy. You'd need to build a whole new line set for it. But if you want something cheap for said purpose, and are willing to reline/mod: http://www.panshkite.com/ Those are actually pretty fucking great kites, I have several and have zero complaints. Built quality is good, and they fly well. I think they're just copying other designs and building them with seconds quality fabric and slave labor. "As soon as you're born you start dying. So you might as well, have a good time." -CAKE I'm crazy not stupid. There is a difference. Quote Share this post Link to post Share on other sites Colm 1 #12 December 20, 2013 Hey all, You guys totally kick ass! Thank you so much for all the great links. It will take me a bit of time to digest it all, but I will try to post any results back here later on. I will be playing around with trim and loading and other things. 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. Reply to this topic... × Pasted as rich text. Paste as plain text instead Only 75 emoji are allowed. × Your link has been automatically embedded. Display as a link instead × Your previous content has been restored. Clear editor × You cannot paste images directly. Upload or insert images from URL. Insert image from URL × Desktop Tablet Phone Submit Reply 0 Go To Topic Listing
IanHarrop 41 #2 December 17, 2013 I found this, its in french but... http://miztral.free.fr/www/index.php?option=com_content&view=article&id=12:flowform%20miztral&catid=14&Itemid=105"Where troubles melt like lemon drops, away above the chimney tops, that's where you'll find me" Dorothy Quote Share this post Link to post Share on other sites
hypoxic_fool 0 #3 December 17, 2013 Also check out this guy's YouTube chanel. Step by step instructions, kinda. Quote Share this post Link to post Share on other sites
Alexg3265 0 #4 December 17, 2013 I've made a few, complete with risers sliders and the like. The last one I made was an elliptical 7 cell, roughly 42" by 20". Look at a normal sized one and scale it down. I used f-111 from paragear, and matched it to my actual canopy. Figure out your wing shape and your topskin and lower skins will be more or less rectangles. The top skins will get wider near the thickest part of the canopy. I learned a lot just from making a few different designs. Playing with different brake settings, packing techniques, and all that can make it open now or snivel for 50 feet. My actual openings have improved and I taught my wife how to pack with my models. I feel like I have a better understanding of how it all works together and how each part interacts with each other. It flies and I had some videos and I'd take more pictures for you if it wasn't in a tree. I may be able to upload the videos later. When I get a chance I might be able to find my cardboard templates and send them to you. Oh and one more thing. 1:1 loading is not the same when it's scaled down. Mine flew best with about a pound and a half on it. Roughly .25:1I was that kid jumping out if his tree house with a bed sheet. My dad wouldn't let me use the ladder to try the roof... Quote Share this post Link to post Share on other sites
Alexg3265 0 #5 December 17, 2013 Videos... http://youtu.be/db_jr83c2RM http://youtu.be/Z9z604cMwJwI was that kid jumping out if his tree house with a bed sheet. My dad wouldn't let me use the ladder to try the roof... Quote Share this post Link to post Share on other sites
Quagmirian 40 #6 December 17, 2013 hypoxic_foolAlso check out this guy's YouTube chanel. Step by step instructions, kinda. Mihawkler? OP, I can put together some rough plans as a starting point if you would like them. Quote Share this post Link to post Share on other sites
Pobrause 6 #7 December 18, 2013 Alexg3265Videos... http://youtu.be/db_jr83c2RM http://youtu.be/Z9z604cMwJw------------------------------------------------------- To absent friends Quote Share this post Link to post Share on other sites hypoxic_fool 0 #8 December 18, 2013 I thought I posted the link lol http://m.youtube.com/user/Thegibolin Quote Share this post Link to post Share on other sites hypoxic_fool 0 #9 December 18, 2013 Actually yes that is what I was referring to. Don't know why I thought different. Quote Share this post Link to post Share on other sites mr2mk1g 10 #10 December 18, 2013 If you're not truely modelling any particular brand, consider looking for a cheap 2nd hand power kite on e-bay or similar. After materials, time and arse ache you'd probably come out on top. Try looking for something 2-3m, maybe a Beamer or a Crossfire 2 by HQ. You'll also find lots of cheap 2-line ones which could be modded at minimal effort but a 4-line kite would almost match a canopy, albeit with probably bit a more extreme of an aspect ratio than you tend to see with canopies. Quote Share this post Link to post Share on other sites ineed2fly 0 #11 December 18, 2013 Kite wont work, as it is designed to fly with the tow points like 2-3' apart, if you put them right next to each other it will distort the canopy. You'd need to build a whole new line set for it. But if you want something cheap for said purpose, and are willing to reline/mod: http://www.panshkite.com/ Those are actually pretty fucking great kites, I have several and have zero complaints. Built quality is good, and they fly well. I think they're just copying other designs and building them with seconds quality fabric and slave labor. "As soon as you're born you start dying. So you might as well, have a good time." -CAKE I'm crazy not stupid. There is a difference. Quote Share this post Link to post Share on other sites Colm 1 #12 December 20, 2013 Hey all, You guys totally kick ass! Thank you so much for all the great links. It will take me a bit of time to digest it all, but I will try to post any results back here later on. I will be playing around with trim and loading and other things. 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. Reply to this topic... × Pasted as rich text. Paste as plain text instead Only 75 emoji are allowed. × Your link has been automatically embedded. Display as a link instead × Your previous content has been restored. Clear editor × You cannot paste images directly. Upload or insert images from URL. Insert image from URL × Desktop Tablet Phone Submit Reply 0
hypoxic_fool 0 #8 December 18, 2013 I thought I posted the link lol http://m.youtube.com/user/Thegibolin Quote Share this post Link to post Share on other sites
hypoxic_fool 0 #9 December 18, 2013 Actually yes that is what I was referring to. Don't know why I thought different. Quote Share this post Link to post Share on other sites
mr2mk1g 10 #10 December 18, 2013 If you're not truely modelling any particular brand, consider looking for a cheap 2nd hand power kite on e-bay or similar. After materials, time and arse ache you'd probably come out on top. Try looking for something 2-3m, maybe a Beamer or a Crossfire 2 by HQ. You'll also find lots of cheap 2-line ones which could be modded at minimal effort but a 4-line kite would almost match a canopy, albeit with probably bit a more extreme of an aspect ratio than you tend to see with canopies. Quote Share this post Link to post Share on other sites
ineed2fly 0 #11 December 18, 2013 Kite wont work, as it is designed to fly with the tow points like 2-3' apart, if you put them right next to each other it will distort the canopy. You'd need to build a whole new line set for it. But if you want something cheap for said purpose, and are willing to reline/mod: http://www.panshkite.com/ Those are actually pretty fucking great kites, I have several and have zero complaints. Built quality is good, and they fly well. I think they're just copying other designs and building them with seconds quality fabric and slave labor. "As soon as you're born you start dying. So you might as well, have a good time." -CAKE I'm crazy not stupid. There is a difference. Quote Share this post Link to post Share on other sites
Colm 1 #12 December 20, 2013 Hey all, You guys totally kick ass! Thank you so much for all the great links. It will take me a bit of time to digest it all, but I will try to post any results back here later on. I will be playing around with trim and loading and other things. Quote Share this post Link to post Share on other sites
