GroundZero

i track my money at [http://www.wheresgeorge.com] hope that link thing worked.. Chris

HMA lines ... Please accept comments from only those with experience... we have seen numerous linesets pass 1000+ jumps, (many of those were in the harshest conditions..desert southwest, USA). First a bit of technical for you chemists out there... _______________________________ Technora is a para-aramid fibre independently developed by Teijin, which has been commercially available since 1987. It has high tensile strength, high modulus and excellent resistance to heat and chemicals, especially acids and alkalis. Technora is made from copolymers and is produced in the different process from PPTA(poly-paraphenylene terephthalamide) Aramid fibres are a type of nylon of which the molecular structure are comprised of linked benzene rings and amide bonds. The U.S. Federal Trade Commission (FTC) distinguished these fibres from conventional aliphatic polyamide fibres, i.e. nylon fibres, in 1974, collectively referring to aromatic fibres as "Aramids." In 1977, the ISO similarly included this name in its listing of synthetic fibres. As is described in this technical guide, Aramid fibres differ greatly from conventional fibres (nylon) in both their properties and applications. Aramid fibres are broadly classified as either para-compounds in which the molecular skeleton is generally linear, or meta-compounds with a zigzag skeleton. Characteristics (1) High tensile strength The tensile strength of Technora is 28g/de(24.7cn/dtex,350kg/mm2), which is 8 times as strong as steel and 3 times as strong as fibreglass, polyester and nylon of the same weight. This property will serve significantly to reduce weight. (2) Fatigue resistance High tenacity fibres generally show a loss of strength against repeated abrasion, flexure and stretch, Technora has excellent fatigue resistance, as compared to the other high tenacity fibres. (3) Dimensional stability Technora has a stiff and highly oriented molecular structure which leads to a high modulus, low creep and low stress relaxation. Due to its low thermal shrinkage, it has good dimensional stability. (4) Heat resistance Technora has a decomposition temperature of 500C. It can be used at 200C for long periods of time and, even at 250C, it maintains more than half of its tensile strength that was measured at room temperature. (5) Chemical resistance Technora exhibits high resistance to both acids, alkalis and organic solvents. It is also resistant to sea water and steam. Mark Cole Sales Manager Industry Achner Weg 6 88316 Isny Tel: +49(0)7562 98 11 45 Fax:+49(0)7562 98 11 00 WWW.Edelrid.de _______________________________________- I was later alarmed by a "claim" coming from a competitor that there was a problem/grounding on paragliders.. so I asked the manufacturer... ............................................. -----Original Message----- From: Chris Martin [mailto:chris@precision.net] Sent: Friday, September 13, 2002 5:12 PM To: Mark Subject: Re: Aramid Mark, Thanks very much. I have heard that in Germany this line has been banned from use in paragliders, is this true or is this a rumor? Apparently, it is due to failure caused by UV exposure. Thanks, Chris ...................................... and the reply... "Morning Chris, No, this is a rumour, we are selling a lot. The unsheathed version goes into competition gliders and the sheathed version more for the general gliders. Maybe you are thinking of PBO which is very UV sensitive even with a sheath we had very bad test results. Be assured we are not selling you anything that is banned here!! Best regards Mark" >>>>>>>>>>>> Be very watchful of claims made by persons who are not knowledgable of their subject... We've had terrific results with HMA lines... do remember, anything can and will fail, but our experience with this line has been exceptional with respect to both performance and durability. With respect to the Nitro/Nitron... I personally feel this canopy will grow to be the most popular canopy ever manufactured. The Nitron is the exact canopy of the Nitro. This is the only design that did not receive any "tweaking" by Precision. (Note: EVERY other canopy built and marketed by us did receive some changes after we started jumping them. Only the Nitro, was a perfect, completed design when it arrived.) If you have not jumped the Nitro/Nitron, you're missing out! Watch for the newest design in higher performance coming soon from the same design team! Chris Martin Precision Aerodynamics, Inc. Let's start substantiating our vague claims (especially when referring to a competitors products)....geez!

The Dash M (and MZ) canopies built proir to April 1999 are subject to the Service Bulletin SB1221. Before you pass on that rig, check the data card and look for a notation that "SB1221 complied with..." By complying with the service bulletin, this canopy will have the same construction as a brand new current model built today... For more information see... http://aerodynamics.com/SB/SB20011221-r1f.pdf and we even have a search engine that, with serial number will tell you about the canopy. If you have any questions feel free to contact me directly, Chris Martin Precision Aerodynamics, Inc. chris@precision.net 423-949-4688

"you don't have to post your story...but why don't you go ahead and post it anyway" i've had 4 airplanes and 3 wives.... i keep explaining that the membership is only valid for one month, that's true ya know! Chris

After seeing you at Richmond I could've guessed the colors... You have to get your own suit... it'll fly better because it fits you! Enlarge the Raeford flock! But you may have to be flexible on the colors for quickest delivery... I'm not sure camo is a rush color option... Chris

"Has anyone done night wingsuit jumps?" yes! "If so are they cool or what?" The temperature is always cooler at night... (Bird-man suit jumps at nite fuckin ROCK!) Chris

"Note the pilot was a private pilot." With a few thousand hours and a bunch of pilot type ratings beyond... private pilot, I'd only hope that I was able to do the same... Sounds like he did a fine job... And I assume that pointing out that he is a private pilot, you are trying to encourage the insurance company to do something other than pay... not to worry, Chris... there was no insurance. this loss is entirely falling on the owner and the jumpers who enjoyed the plane... I like the quick reports from the ntsb, we all like to see the story for educational purposes, but once again you point the "I'm better than that lowly pilot" finger with zero benefit to anyone but your own ego... Give it a break. Hope everyone's well and thank God no one was hurt... Godspeed in the DZ recovery, as a plane crash/incident can be almost as devastating as a fatality... Chris (Martin) Epaulets don't make a pilot... with additional ratings, would this pilot have chosen to land the aircraft?

Tennessee Skydiving Center, Tullahoma, TN..... Bud Light (but there's always at least one Mason jar full of elixir in the fridge...) Chris

let's see... a Crystal method mix... oh this is nice... the New Diamond Rio cd... how 'bout that "mistake" song...(sorry, i don't know names...) bb king.... Talking Heads.... good canoeing music..... that "River" thing... and a digital remix of Yes.... shit, I'm heading back out to the car to plug this cartridge back in.... oh... A schweet Vivaldi 4 seasons... and a Pink Floyd (does that tell my age?) (tell Kristi I'll be in before the sun comes up....) Chris

holy sheeet! Lota information here... subtract clay's posts and we still have lotsa great information! Chris

Go for it.... Chris you should see what I jump.... Oy! Your shit is better than mine!

I love taking newbies for their first jump... and EVERY time, they continue to fly into the neighboring state/country.... after many gun runs attempting to turn them back to the dz, they usually continue to fly on.... but... never have I ever seen a first bird-man jump (after they walked back a mile or so...) not have an incredible smile... I remember my first Bird-man suit jumps... flew to Hell's creation and beyond, walked for a long time through impossible terrain, only wishing I was already packed to make that load that just launched. Chris

exactly....

Laguna! all the way baby!!! absolutely smooooth soles... can only be purchased from their exclusive outlet and always on sale at lobor day through "their gone"... These are the Wal-mart brand flip-flops.... while you can hang onto them easily through freefall by squinching your toes, I've found it easier to put a rubberband on the toe-thong piece and slip it over my big toe. Memorial day thru Labor day, 4.95/pr..... after that... $1.99 per pair, limited selection. Yehaa! Chris p.s. i also broke a foot bone when the toe caught a few years ago... but I was lookin great!

the bad part is that, while I've averaged .80 jumps per day... during the same time I've averaged 1.15 flight hours per day... (Damn this "bus-driving"!) It ain't fair... Chris

Phree, I think you're exactly right... the working stiffs usually get more jumps per year compared to the recreational weekenders. I like the jumps/day ratio... in 18 years, I've averaged .80 jumps per day. Guess it would have been higher if I never learned to fly an airplane (or drive the bus, as I prefer to call it...) Chris

Best Wishes to all and especially you Lisa... been a long road. Great Cause too, someone post the link. Our continued support and thoughts can make it happen. It's truly a "team" event. If we can raise a little more money, we might even be able to get Kate into a pretty jumpsuit too. Chris

been done already.... See Burt Lancaster in Gypsy Moths... But we simply want to improve on the results. ----------------------------------------------------------------- now.... "Re: [kevin922] landing a birdman suit.. it IS doable..? [In reply to] Quote | Reply -------------------------------------------------------------------------------- You know that in theory , it is possible to build a belly flying formation so large that it will move so slow that no one has to pull. I will start the sign up right here. 1) Chris 2) 3) -------------------------------------------------------------------- Who's next? I'll Sign up... it's only a matter of time... (notice I didn't get time specific there), but it will happen soon enough, we will all witness a successful landing. Chris Hey, just to note, I signed up for landing a Bird-Man suit, not smoking it in with a big-way belly formation with just enuf aad's to take out our lift....

If you need to ask... you don't need a joint acount. if you have joint accounts and it poses no problems... you don't need to ask. Chris

racing thru... didn't read the text, but..... when I can't read the windsock.... I usually biff-in Chris

Does anyone have the breakdown on this weeks Para-performance competition at Perris? Chris

from what I heard... (2nd hand info... someone out there please post corrections if needed...) TJ Langren won distance... Xaos 27 (sorry I don't know who... ) won speed with pd (assume Velocity?) Chris

Links can make lines (entire riser groups) longer... if you want to try shorter, tie knots in the lines at the lower surface of the canopy.. there they won't interfere with the slider on opening... those are quick and easy line trim techniques we do in the field (away from a bartacker) Chris

It is important to note that the center of lift produced by the airfoil and the positioning of the center of load is what makes the pressures on the corresponding risers vary... ie higher or lower riser pressures... beyond that, performance of the canopy varies greatly with respect to where the load is placed in respect to the center of lift... Differences can be seen in how long a canopy will remain in a dive (recovery arc), differences in riser pressures, differences in airfoil efficiency (how far it will surf), differences in neutral flight speed, and very importantly, differences in stability. The lineset (among other things) determines the relationship between the center of lift and the positioned center of the load below. This is one of the many variables of canopy design.

cobaltdan claims: "but basically where you 'hang' under the canopy is a function of the airfoil chosen and its pressure distribution." groundzero replies: the point where one "hangs" is determined by the designers lineset. Angles determined by the b and d cascades and their insertion point in the a and c lines will determine where the mass will be located under the airfoil, whether it be a "pd" airfoil, an atair airfoil or any other airfoil. must run to play! Chris xox