Nightingale 0 #1 July 10, 2007 My cypres is expired, or almost expired, and I was trying to figure out what to do with it. I've already managed to put a working cutaway system on a teddy bear's rig, so I was thinking it'd be cool to come up with a cypres activated parachuting bear. I'm guessing I'll have to perform some minor surgery to implant weights into the teddy bear to get it falling fast enough to activate the cypres. I was going to try to get my hands on an old reserve pilot chute with spring, and build a bear rig that will hold just the reserve pilot chute, the cypres, and a closing loop. I figure the pilot chute should be more than enough to slow the bear down to a safe speed. I guess the key will be finding the right balance between weights to increase the freefall speed enough for the cypres activation, and the size of the pilot chute to slow down the bear. So, does anyone have any tips on how to go about doing this, and could some of you engineering/physics/math people help me figure out the weight/pilot chute ratio? Quote Share this post Link to post Share on other sites
yeyo 1 #2 July 10, 2007 Quote .....and could some of you engineering/physics/math people help me figure out the weight/pilot chute ratio? I think that the 'trial and error' would be the most fun part.... HISPA #93 DS #419.5 Quote Share this post Link to post Share on other sites
DougH 270 #3 July 10, 2007 Sure it will be a hoot... right up until it puts a hole in manifest's roof. "The restraining order says you're only allowed to touch me in freefall" =P Quote Share this post Link to post Share on other sites
Nightingale 0 #4 July 10, 2007 Quote Sure it will be a hoot... right up until it puts a hole in manifest's roof. Yep. That's why I decided to go the math route. Except, I never took physics, so I have no idea how to begin figuring that out. Quote Share this post Link to post Share on other sites
Nightingale 0 #5 July 11, 2007 Quote Quote .....and could some of you engineering/physics/math people help me figure out the weight/pilot chute ratio? I think that the 'trial and error' would be the most fun part.... I'm trying to minimize the amount of cypres cutters I'd need to go through to get the ratio right. That could get pricey Quote Share this post Link to post Share on other sites
MakeItHappen 15 #6 July 11, 2007 QuoteMy cypres is expired, or almost expired, and I was trying to figure out what to do with it. I've already managed to put a working cutaway system on a teddy bear's rig, so I was thinking it'd be cool to come up with a cypres activated parachuting bear. I'm guessing I'll have to perform some minor surgery to implant weights into the teddy bear to get it falling fast enough to activate the cypres. I was going to try to get my hands on an old reserve pilot chute with spring, and build a bear rig that will hold just the reserve pilot chute, the cypres, and a closing loop. I figure the pilot chute should be more than enough to slow the bear down to a safe speed. I guess the key will be finding the right balance between weights to increase the freefall speed enough for the cypres activation, and the size of the pilot chute to slow down the bear. So, does anyone have any tips on how to go about doing this, and could some of you engineering/physics/math people help me figure out the weight/pilot chute ratio? This might help. BTW, Kevin Donnelly, who is mentioned in that article, lives in Elsinore. He would be a good 'go-to' guy for your project. If you need contact info, email me at aerosoftware_AT_MakeItHappen.com (_AT_ = @) Mike Owens would be another that could help you out. They are both retired and just wandering around wandering what to do with themselves..... ;) They are both riggers and may know who has expired cyprii coming up. You can scavenge the cutters from those folks. I also have some containers from the 'Dirty Ed' collection that may be of use. .. Make It Happen Parachute History DiveMaker Quote Share this post Link to post Share on other sites
Nightingale 0 #7 July 11, 2007 Wow! Thanks for the info! Paige sent me her teddy bear, and I hooked a pilot chute up to it as a main, and the bear's container was basically a BOC pouch with straps to hold it to the bear (12" bear). The pilot chute was the perfect size. Clownburner jumped tandem with the Teddy attached to his chest strap and deployed Teddy at about 700'. Teddy swooped the pond before (to my relief) landing safely on the opposite shore. He also made a few base jumps before getting sent back to Paige with his new rig. I think constructing a bear-sized rig shouldn't be too much of a problem. I just need to figure out the right balance between enough weight to get the bear to accelerate enough to set off the cypres, but light enough that a large reserve pilot chute will be sufficient lift so he doesn't make a new skylight for manifest. I'll definitely be contacting some of the riggers (hi, Sparky!) to figure out how to hook up the cypres. Sparky's bear is the one I made with the working cutaway system. As soon as I get some of the math worked out regarding weight/speed/lift, I'll drop you an email for Kevin's info too. Thanks again! Quote Share this post Link to post Share on other sites
MrBrant 0 #8 July 11, 2007 I've always been tempted to pick up an old, FXC-12000 for stuff like this. It fires, just reset the spring, and send it up again! Quote Share this post Link to post Share on other sites
DougH 270 #9 July 11, 2007 What were the activation parameters for those units?"The restraining order says you're only allowed to touch me in freefall" =P Quote Share this post Link to post Share on other sites
piisfish 140 #10 July 11, 2007 Quote I think that the 'trial and error' would be the most fun part.... -hold the teddy in the arms (to reach speed parameter) -once Cypres fires, check your alti (to control altitude parameter) -pull reserve handle (to control rigging parameter) DO NOT LET MURPHY PARAMETER GET IN PLAY scissors beat paper, paper beat rock, rock beat wingsuit - KarlM Quote Share this post Link to post Share on other sites
ChrisL 2 #11 July 11, 2007 Quote I'm trying to minimize the amount of cypres cutters I'd need to go through to get the ratio right. That could get pricey Cutters? I'm thinking that if it didn't activate and hit the ground at nearly activation speed that would be your only attempt as I doubt the control unit would still be functional__ My mighty steed Quote Share this post Link to post Share on other sites
MrBrant 0 #12 July 11, 2007 Quote What were the activation parameters for those units? Activation altitude: Whatever you set it at (usually 1000 feet - but you can set it up to about 4k i believe) I believe the "ideal (laboratory) conditions" tolerance is +/- 200 feet. (required to pass annual chamber tests) In real life, pull at least 1500 feet above activation altitude. According to This page, it is guaranteed NOT to fire below 40 fps, and guaranteed TO fire above 65 fps. Quote Share this post Link to post Share on other sites
Nightingale 0 #13 July 11, 2007 Quote I've always been tempted to pick up an old, FXC-12000 for stuff like this. It fires, just reset the spring, and send it up again! oooohhhh..... I must find one of those! Quote Share this post Link to post Share on other sites
Fast 0 #14 July 11, 2007 Quote Quote I've always been tempted to pick up an old, FXC-12000 for stuff like this. It fires, just reset the spring, and send it up again! oooohhhh..... I must find one of those! Yeah, they fire at a lot slower decent rate than a cypress too. A student under a 288sqft main can set one off doing hard spirals.~D Where troubles melt like lemon drops Away above the chimney tops That's where you'll find me. Swooping is taking one last poke at the bear before escaping it's cave - davelepka Quote Share this post Link to post Share on other sites
peek 21 #15 July 11, 2007 Quote...so I was thinking it'd be cool to come up with a cypres activated parachuting bear. I made a FXC 12000 operate a weight in a box with a pilot chute. It worked well, but it was difficult to get a skydiver reliable enough to put it out over the landing area so I could enjoy the suspense. When it spent a few days in the corn I got discouraged with the idea. It is a neat thing to do, but will require some work figuring out the configuration. I believe the Cypres doc specifies a "minimum loop tension". If you use an FXC 12000, the cable is so stiff that it makes it difficult to work with. In other words, these devices assume you will be mounting them on a tightly packed "normal" reserve, so a small parachute and container/bear will need some adjustments. Being mechanically inclined helps. Quote Share this post Link to post Share on other sites
flyinchicken 0 #16 July 12, 2007 OMG I LUV it. Nightinggale! I need a flyingchicken! Good luck with your project! "Diligent observation leads to pure abstraction". Lari Pittman Quote Share this post Link to post Share on other sites
Nightingale 0 #17 July 12, 2007 If you or I can find a stuffed chicken, an air-chicken can be arranged. Quote Share this post Link to post Share on other sites
pinkfairy 0 #18 July 13, 2007 Teddy Bear doesn't need a parachute. He doesn't have any bones in his body to break, and being filled with airy, acrylic material, he will have a pretty low terminal velocity. There might be rules against dropping him, though. Why not return the cypres to Airtech Gmhb? I think they will give you a discount on your new Cypres2.Relax, you can die if you mess up, but it will probably not be by bullet. I'm a BIG, TOUGH BIGWAY FORMATION SKYDIVER! What are you? Quote Share this post Link to post Share on other sites
Royd 0 #19 July 13, 2007 Quote Teddy Bear doesn't need a parachute. He doesn't have any bones in his body to break, and being filled with airy, acrylic material, he will have a pretty low terminal velocity. There might be rules against dropping him, though. Why not return the cypres to Airtech Gmhb? I think they will give you a discount on your new Cypres2. Sheesh...and bed sheets belong on the bed, not for being used to jump out of the barn loft. Quote Share this post Link to post Share on other sites
piisfish 140 #20 July 13, 2007 Quote Why not return the cypres to Airtech Gmhb? I think they will give you a discount on your new Cypres2. she can still return it afterwards scissors beat paper, paper beat rock, rock beat wingsuit - KarlM Quote Share this post Link to post Share on other sites
Nightingale 0 #21 July 13, 2007 We've done teddy bear deployments at Perris before, and of course, will follow anything they say about it (including "no", if they want to say no). Why do it? because it's fun. I wasn't planning on buying a cypres 2 new anyway, so there probably isn't any reason to return the cypres to the manufacturer. Quote Share this post Link to post Share on other sites
piisfish 140 #22 July 13, 2007 QuoteI wasn't planning on buying a cypres 2 new anyway, so there probably isn't any reason to return the cypres to the manufacturer.AFTER PLAYING AND THROWING bears, you can "sell" it for a couple of beers or anything else to someone who would enjoy a 60$ rebate on a new cypresscissors beat paper, paper beat rock, rock beat wingsuit - KarlM Quote Share this post Link to post Share on other sites
SpecialKaye 0 #23 July 13, 2007 you might want to get your rigger to get some batteries from ssk so that you'll have some in "reserve"...they're like $75 a set. send me a pm with some measurement for teddy...i think i can come up with a rig for teddy to hold the cypres (which i have one expired here, also)...this could be fun. later, kaye Quote Share this post Link to post Share on other sites
Nightingale 0 #24 July 13, 2007 I want to make the rig myself. Thanks, tho. Quote Share this post Link to post Share on other sites
pinkfairy 0 #25 July 13, 2007 Quote Why do it? because it's fun. Sure, have fun, be safe. I think I heard somewhere that potato sacks with AADs would be safer than people skydiving. Potato sacks don't turn low. I'm sure that applies to Teddy Bear too.Relax, you can die if you mess up, but it will probably not be by bullet. I'm a BIG, TOUGH BIGWAY FORMATION SKYDIVER! What are you? Quote Share this post Link to post Share on other sites
