cobaltdan

i have jumped with luis and seen him load at 3.5. but he would have to wear 60# of weight on the 46 for 4.7/ as far as i know this was not done. to be sure i left message for luis today to verify. sincerely, dan

hook : just backing you up -dan

lol , didn't catch that one..... tomaz: any jumping going on in bled or is there still bs with the plane club? hope to be where you are in a few weeks. -dan atair

zp tandems are more expensive than f111. but a tandem canopy is a work tool. it makes you money and ultimately the higher cost of a zp canopy up front yields a higher return, as the zp canopy can greatly out live and out service an f111. purchase price should not be of first concern when choosing tandem equipment. the difference between cheap junk and the best equipment when spread over its money producing lifetime is negligble. be sure not to be penny wise, pound foolish. sincerely, dan atair ps. we have some great video of our tandems canopies posted on our web site www.extremefly.com

vipers are not prone to spins. please check the line trim. the cobalt which is one of the most stable ellipticals ever is based on the same airfoil and planform as our earlier viper. (the viper was a wonderful canopy which evolved into the alpha which evolved into the cobalt). manufactured by atair and sold under private labeling via skydepot/winchester and performance variable. sincerely, dan atair www.extremefly.com

quade, as always, i will gladly back up any statements with recorded data from the loggers. any performance specifications i post on a public forum are not proprietary. much of the technology behind how we are able to design and manufacture wings of this performance is proprietary and will not be discussed. sincerely, dan atair www.extremefly.com

hook, you are correct about why hma is not cascaded. common paraglider construction technique was not to bartack hma but to glue using cyanoacrilate and sometines a ziz-zag stitch on a 2" side by side overlap. also remember: -a single fiber of hma loses up to 60% of its strength after only 4 hours of bright sunlight exposure. -hma has 1/8 the elasticity of spectra. sincerely, dan atair

-the 25 was 'set' out the door as in a military cargo tandem. it provided just enough drag to aid in stabilization and prevent acceleration above 120 within the first 6 seconds. -the 170 was a back up main. experimental --> main ---> reserve -glide ratio is not the same at light to heavy loadings. (some details are proprietary) sincerely, dan atair

aces were marketed through performance variable in germany. you probably will not find many in the states. sincerely, dan

stilletto or contrail, hmmm (we manufacture the contrail btw), give a cobalt a try before you decide, i think you will like it better. sincerely, dan atair www.extremefly.com

the smallest cobalt we have produced is a 25 sq '. although it is possible we will not allow our pilots to attempt a landing. -dan atair www.extremefly.com

yes a 126 will fit. sincerely, dan

picture of stage 2 of deployment

i am in a bit of a rush but want to try to answer everyones questions: -there was no extra space, the container was custom designed and manufactured for these test jumps by relative workshop. the rig holds 3 parachutes. a 120, 170 & 385. mounted to the cargo container is a 4th parachute and the cargo may be cut. rig and cargo were instrumented with 2 cypress and 3 dataloggers and multiple sensors. -we collected 65 mb of data from the jumps. it will take another week to fully analyze all the jumps. glide ratio calculation from one jump shows 4.46 in full glide -this is the record for the highest wingloaded canopy that can generate 0 to positive lift (landable). additionally it set the record again for the highest glide ratio and efficiency. -no tandem drogue was used, just a 25" pilot chute. we should be able to post video and data on our site by end of next week. until then some quick pics to follow: line stretch , stage 1, stage 2, and full flight the next drops have been financed by the military and are for 2000#. sincerely, dan atair www.extremefly.com

335 # of additional weight. check out the picture

atair test jumper john heady with 385# weight for a total exit weight of 535 lbs under a competition cobalt 120. absolutely beautiful soft deployments at terminal. on one jump the canopy was deployed shoulder low inducing line twists before the bag was open, canopy flew straight. the canopy out performed everybody's expectations. the glide ratio was incredible. free flight vertical speed -15 fps. with a max positive speed in a flare measured at 18fps. i will post video next week on our site. :) sincerely, dan atair www.extremefly.com

i don't know about penalties but on your honor it is only proper to pay $20.00 to the blade owners. dont walk off the field and hope you dont get blamed. if you play with someones toys , be responsible and anti up the $20 if you break them. sincerely, dan atair

for container sizing cobalts will pack identical to a similar size stilletto. sincerely, dan atair

jim, i will be off line for the next several days. we are traveling to perform a series of military test jumps. if you post a more specific question, i will be glad to try and answer on monday. sincerely, dan atair

eg from eg sky systems will make you a great banner for a great price ! sincerely, dan

"Do you know how many times the "picture" of the wind tunnel has been used in Icarus advertising? I do. Do you know how many times that wind tunnel has been used? I do.." yes i do, that tunnel was designed, built and operated by an atair employee family member. if i was interested in bashing icarus i would explain what you were refering to...i am not. "...rolling test rig. With respect to "(This is a wind tunnel like technique... ) Come on folks! Everyone here on Sangiro's cyber world seems brighter than the average Joe..." rolling test rigs are not "bs" as you feel. they are an invaluable tool for testing canopies or other aerodynamic bodies. interesting to note that EVERY new paraglider design must be tested on a rolling test rig for certification and even leading aerodynamic and aerospace companies i.e. aerovironment: paul macreedy (helios, solor challenger, gossamer) and burt rutan aircraft rely more on rolling test rigs than wind tunnels. there was a comment made that someone did not understand the terminology i used to explain our test proceedures. i will be glad to further explain in laymans terms on or off line. sincerely, dan atair

this was a reply to a question: 'what about.. atair?' -dan

great post. in a sport where the experts get hurt probably more than begineers, frequent reminders of all the basics and mistakes are greatly appreciated. there was a tragedy at skydive suffolk last week when a very experienced 5000+ jumper hit his head on the tail. -dan

A question was asked about buying a new canopy design. if one should wait for others to jump it and work the bugs out. The fact that this happens is completely unacceptable ! Skydivers through their purchasing decisions should reinforce this strongly to manufacturers. Atair's testing regime begins with kiting, then instrumented flights on our rolling test rig. (This is a wind tunnel like technique, allowing close up video, and data to be taken from sensors not practical to jump with). Next, a canopy goes through a test jump schedule and routine. High speed data is logged from 9 sensors and belly cam video is taken. Atair is the only company in the world taking 4 point riser load data, let alone inertial position data. When required we take belly cam footage using a high speed camera, 35mm film @ up to 80fps. We have even taken internal video of our formed nose canopies in flight ! to exactly inspect nose distortion during different speeds and maneuvers (we use a micro miniature wireless video camera). After our rigorous in house jump testing is complete and passed, canopies are made for our professional jumpers. It is there job to jump the new design for a solid season and keep accurate logs. Only after a successful season and thousands of logged hard core jumps is the decision made to release the canopy for sale to the public. Even minor design changes go through this full routine. I.e. the competition nose modification to the cobalt. We have inspected every canopy design flaw that has made it into the market and asked ourselves if they would have passed through our test system. The answer is no, none of them would have passed. Our test routine is extremely expensive, and strongly limits our expansion. Our canopy development has far out paced the financial capacity to qualify them. We have competitors with equal financial power to us but that have brought to market 4 times the number of new canopy designs than us in the same time frame. We could do this by cutting our testing practices. We choose not to. This is about passion, safety and perfection for us. Sincerely, Daniel Preston Atair Aerodynamics www.extremefly.com

you should contact the manufacturer to describe your problem and get a line specification chart. then check your line dimensions. also note that 'pumping' your brakes to inflate end cells is not as effective as a slow deep flare and if your slider is stuck substantially up try evenly leaning on rear risers. sincerely, dan atair