Staso

i consider absence of "check-beeps at 1k" to be a pretty good warning itself. if you get no check-beeps, you know that something's up and that you can't rely on audibles for this jump. and it sounds like the units were not turned on prior the boarding. chances that both units will fail simultaneously are very slim. chanses that the were forgotten to be turned on are much higher. stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

what is his last name ? stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

you kinda lost me here ... what guy ? and who is Gary ? :) stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

no, i meant forum at http://speedskydiving.proboards19.com/ i don't think we have enough people interested in this discipline yet. there was a poll about what new forums people wanted and speed skydiving was actually one of the choices. stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

i'm not sure ... it could be fun, but it'll be harder to organize, why wouldn't you start a topic on speed skydiving forum on this subject ? let see what people think ... i saw the magazine :) the article is not mine :) dude on my right, Ken Hansen, wrote it. and now i owe beer at my DZ :) i'm 6'2", so they are a little shorter. stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

what about option "i compete and it scares me" ? i decided to go slow this weekend. got stupidly low on one jump but got 84 seconds of delay. i know, 1300 ft (see pic attached) is beyond low, won't do it again ... the lowest speed was 85.89 mph. i did a couple more of track dives after that one and got better average speed speed - 96 mph but not better then 86 on on the lowest. stan. p.s. i jumped tight all nylon tony RW suit with booties, the same i use for speed dives ... -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

Do I fell a new greenie about to hatch?? Amazon -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

i voted for speed skydiving forum since it's my favorite discipline, but i already manage speed skydiving forum at http://speedskydiving.proboards19.com/index.cgi not to steal any people from here, but everybody is welcome anyway ... stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

yes. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

after you deployed, it takes all the data 10 seconds after exit and 5 before deployment and ignores the rest. what's the problem ? numbers may be inaccurate. it could be 12 and 5 or somthing like that. it's all in the manual. opening altitude is determined as altitude where "significant decrease in vertical speed" was registred. stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

once again, i don't wanna say that you were not going fast. :) you have to go fast to get to 330 mph spike :) > For one thing, the graph confirmed what I felt in freefall, with an initial acceleration > period, some wobbling, followed by regaining stability and more acceleration. So I > don't think I imagined that. well, to tell the truth i think it's very subjective. very often it feels super fast and you get all excited but then you get to the ground to find out that in fact it was pretty slow.and it also happens other way around. my last 400 jumps were 99% speed dives and it's still hard for me to tell right away how jump went. > The other thing is that the graph shows a nice hyperbolic curve over a period of quite > a few seconds, peaking at 330 mph. [IMHO] that actually would be a sign that that could've been a spike. usually when pro-track goes from shadow back to air stream and finds itself a thousand feet lower then it thought it will have to catch up for lost time and it would produce that nice hyperbolic curve to compensate. since it lost that altitude and has no data for it it will aproximate it in nice smoth way resulting in nice curves. that also explains speed going from 300 mph to negative (!) on descellerations. i myself got down to 22 mph on the graph which i think far away from truth. other people got negative speed and negative deployment altitudes. [/IMHO] again, i'm sure you were going fast. maye you even were going faster then 330 :) i'm just trying to say that it's hard to be sure what the real speed was basing only on one protrack and the feelings. at least two protrack should be used to compare the reading and preferrably placed somewhere where they wouldn't go from and to the air stream. for one thing, now speed skydiving community seems to settle down on how measure the speed and so far we had more or less consistent results which we can use for competition. stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

it doesn't measure your speed for first 10 or so seconds after exit and like 5 seconds before deployment. even when i have my average speed for the whole dive about 240 mph (speed dives) i still have about 40 seconds of freefall time. that will explain difference in average speeds you calculated and the average on the protrack display. don't blaim pro-track, it's a nice device :) stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

L&B, manufacturers of Pro-Track and Pro-Dytter were one of the co-founders of speeds skydiving, at the moment the manual was written ankle placement was considered the best. after several years of competition it was found that it was far from the best. again, it's been years since speed skydiving started and we don't have to start from the beginning again and seek for the bet place to put a protrack or how to measure speed. i think we should use the experience accumulated and play together. lateral webbing is the piece of webbing that connects lower part of you rig's "backpack" to your harness. it's in the area where you kidneys are :) stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

330 moh is mighty impressive i must say. but as it was already mentioned, there are couple of things to keep in mind. front thigh pocket doesn't seem to be very good place to put a protrack. legs can easily go in and out of air flow which could result in speed spikes. back when protrackes were mounted on ankles, speeds up to 600 mph were registred. mostly due to kicking :) and even when people swear they were stable the whole dive usually it's not true. lateral webbing now is considered to be the most "fair" place to put a protrack. since it's in the middle of the body it will eliminate at least one type of oscillation spikes. and since we use 2 protracks and average reading it should eliminate other as well, even with protracks placed on laterals the readings could be very different from one side to another. jumps with difference between one and another average speed more then 20 mph do not count for competition. one of the guys in UK on one of this year world cup meets showed about 340 mph on ne side and 280 (?) on another. but anyway, in any case 330 mph indicates pretty high speed ... GIF works pretty well for images which don't need more then 256 colors. can you try to get a better one in GIF format and post it again ? or PM or email me (stansnigir@yahoo.com), i'd like to take a better look at it. and can you put speed measurement zone limist on the graph ? and one more thing :) going flat right away from 300 moh dive is fun ! just keep arms along your body and enjoy the Gs !!! :) stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

of course there is always terminal velocity for given body position and air density. provided time is not limited. which is not the case for speed skydiving from regular (13.5 ft) altitude. we keep going till it's time to slow down. i know that below 5 and 4 thousand feet i would keep accelerating. also it's hard to maintain perfect body position, the whole dive is a fight for stability. in perfect world one could just take ideal body position and keep it and the most dense person will win. stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

from the manual .. see attached. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

would the Jump-Track software show this? Levin vSCR#17 www.freeflyers.com i think it does. there is no plateau, just peaks ... -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

at this point i'm not aware of terminal velocity for speed skydiving jumping from conventional altitude :) -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

i have my first warning altitude set at 5000 ft and go flat right away - no transitioning, no speed bleeding. full, flat track. i slow down for about 10 (?) seconds and i pitch right after i hear my second warning (3500 ft). at this moment i still travel at higher then usual speed. sometimes about 150 mph, sometimes even more. keeping going below 5000 ft is extremely foolish, so i'd say 5000 ft is my speed hard deck. speed may differ slightly at different DZ due to elevation, but 1 second hesitation before slowing down is much more significant. i think we should merge at some point :) stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

so what do you measure ? maximum speed only ? stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

hey Amazon, We plan to have one of the most likely 4 speed meets next year, here in the US. My home dropzone is Jumptown (jumptown.com), in Orange, MA, 70 miles west of Boston. Since most likely I'll be organizing the meet, I'll be pushing to have it at my home DZ. Currently we discuss next year competition at Speed Skydving forum, located at speedskydiving.proboards19.com, you are welcome to take a look and participate. 204 mph for the whole dive is pretty good, but it's not very good figure to base on. Sometimes my average over 1 vertical km (the official way) is higher on the dive with 200-ish average then on one with 240-ish average. But it definetely shows that you go pretty fast :) Stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

congrats, man !!! :) stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

> I did a low turn to avoid it...........360 deg............. sorry to hear about what happend, but how would 360 degree turn would help you to avoid it ? wouldn't you face the same direction after the turn ? or is it just bad wording and you were trying to lose some altitude ? stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

i thought you meant FreeFly :) -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum

it was NOT a FF jump :) Stan. -- it's not about defying gravity; it's how hard you can abuse it. speed skydiving it is ... Speed Skydiving Forum