USPA

Like others stated: Vigil: Voluntarily inspection whenever you want too. Argus: Mandatory inspection every 4 years, it's just on-site. (Voluntary inspection at factory also possible) The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Still incorrect. Like stated earlier in another thread, this only occurs when you " trick" the cypres 1. Cypres 1/2, Argus and Vigil I / II, don't have a linear decision three. They constantly correct measured air pressure, to "assume" a correct height. What Billvon stated is true, but only when you "trick" the AADs. If you have a continued stable back to earth position for most (entire?) time of the skydive, it will fire aprox. 300 feet higher, since it has no information that it isn't stable belly to earth. Therefore it assumes it is stable belly to earth and "add" 300 feet to the fire altitude. There are other ways to trick them in this "mode", but it certainly isn't default behaviour. Most of the time the AAD will be constantly correcting it's parameters and use algorithms to correct the measured air pressure. You can also read this in the Airtec statement which is mentioned in the thread which you link too. (http://cypres-usa.com/cyp13.htm) This is mostly a "problem" of the first generation electronic AAD(s). All current AADs have far more computing power then the first generation and are therefore possible to use correct for these fluctuations way faster, therefore making an already unlikely scenario far more unlikely (but not impossible). The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

incorrect The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Notice the difference between cypres 1 (which your refer too) and cypres 2 which is the current cypres (which doesn't have battery replacements anymore) Also at our DZ we had an unfortunate experience before 2 year replacement was mandtory... A relative new cypres which had been laying on the shelf for most of it first 2 years, did an ok battery check but didn't fire. due to a low battery. The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

This is a nice sheet! Another recent thread made it painfully clear there is some confusement out there concerning activation states of AADs. I was thinking about doing something similar, but I couldn't think of a way to visualize, that with the student cypres, below 750 feet any speed above 13 m/s will trigger an activation. In your text in the sheet it is made clear, but the visual representation would be even nicer. Does anyone have an idea? Also maybe supplement with other AADs? (although visualizing Argus Swoop mode is also a challenge) The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Because you asked me to reread your post, I will go through it step by step. *** No, it WILL fire No it fires when it measures a corrected speed above 13 m/s AND below 35 m/s at 1000 feet or lower, and at 750 feet or lower when it measures a corrected speed of 35 m/s or higher. No, see above They aren't they are both very much exact, the student just has an extra "go" parameter. No, it doesn't. It means that when speed is higher then 78 mph / 35 m/s it won't fire until 750 feet. No since speed is higher then 78 mph / 35 m/s it won't fire until 750 feet. AADs are calibrated for a fast array of things, among which it's burble. In the first generation device, with way less computing power then the current iterations, an sudden upright position at aprox. 1050 feet or lower, could trigger a fire. Although not impossible with the current AADs, this has become way more unlikely. Most often people site 1250 feet, because you can still see that on your altimeter, but the true correction is aprox. 300 feet in the first generation devices. Yes, it is actually set with different activation settings. A partial malfunction, resulting in an upright position, but with a speed of 35 m/s or above, will not trigger a fire until 750 feet. No, see above No, this is correct Depends on what you mean, yes it will fire at 750 feet and a speed of 29 mph / 13 m/s. But it that speed is obtained at 1000 feet or lower (but of course above 130 feet) and speed isn't above 78 mph / 35 m/s, it will fire. If speed is 35 m/s or above, it will only fire at 750 feet or lower (of course again above 130 feet). Sorry but you thought wrong. It is based on lack of knowledge of your own, and your students gear. The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

*** Oh my, you are completely mistaken here and miss some fundamental understanding of how these devices are programmed. Cypres 1/2, Argus. Vigil I/II, aren't simple yes/no triggers measuring air-pressure. These devices have complex (relatively) algorithms to correct for a number of things such as Tumbling / controlled maneuvering and other then belly to earth free fall position. These algorithms van be fouled, first generation more easily then second generation, because the later have far more processing power, so can correct themselves way better/faster. Please make not that the student cypres does have 2 distinct activation parameters and although in the case of cypres it only measures air-pressure, going from air-pressure to actual height and from there to speed, is not trivial task and it shouldn't be assumed it's calibrated for normal freefall. There are some AAD representatives on this forum, maybe they could explain better then I can... The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Well you should ask Helmuth about that... But it is true that a 2 out situation in inherently more complicated then a reserver activation. (bear in mind that when Cypres was released, people associated AADs with unnecessary activations (the FXC wasn't as reliable as it is today) ) That being said, Airtec is the only manufacturer who uses the way of activation, Both Argus and Vigil (I/II) activate at 20 m/s (45 mph) at aprox. 1000 feet in student mode. The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Hmmm... as an instructor you should really got more familiar with the gear you send you're student up with (presuming you have students using a student Cypres). Anyways to compliment my own and Billvon postings: If a student cypres goes 78 mph or faster, it will fire at 750 feet (or below). If a student cypres goes 29 mph or faster, but slower then 78 mph, it will fire at 1000 feet (or below). The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

WRONG... student: 750 feet, 78 MPH (6,840 FPM). 1000 feet, between 29 MPH (2,552 FPM). and 78 MPH (6,840 FPM) The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

All manufactorers recommend turning off student AAD. That being said, we only turn of FXC. Of the electronic AADs, the cypres is most easily scared (13 m/s at 1000 feet) at aprox 2500 feet/minute Although extreme such a measurement is possible during a "normal" descent at 1000 feet. Our pilots have strict instrucions to keep descent speed way below 1000 feet/minute from 3000 feet and lower, if we do a descent with students aboard... The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Is this really a gear and rigging thread? Anyways... I always thought the "new-smell" in cars, came from the plastics itself, and if you want to sell an used car, you use this scent, to psychologically make the car "newer"... ? The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

But it would be nice to have an AAD which knows something more then just your height (en therefore speed), wouldn't it? Guess what... there is... The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Nice to see alternatives! We're running JR5 at the moment and looking for an upgrade at the end of this season. I'll look into your solution... The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Hey Matt, Are you still in business? You're not repling email and the phone seems disconnected? The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

What error are you exactly getting? Although I won't be able to get to a JR4 installation for several months (am in the US for an internship) but I can get JR5 and try it on my Win 7 ultimate laptop. (have a VPN connection with my DZ). I'll let you know if that runs. The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

So happy there are still logical thinking jumpers around... The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

I agree, Besides the AAD, the skyhook system is IMHO the most complicated piece of safety equipment out there. In contract to that, I still like it... The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Hi Ozzy, If your honest to yourself, would it have made any difference in your case? You cutaway without arching and immediately pulled your reserve yourself. Also in your case the skyhook functioned as a normal RSL, instead of a proper skyhook. edited to add: I missed an entire page of posts, before I made this reply. The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

I disagree on needing the choice, but that's an endless debate... (rec.skydiving flashbacks... :D ). I jump RSL, Skyhook and disconnected RSL. The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Next time, whatever system you have on your back, Arch before you release... (arching after release is too late) The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Didn't know it was a fight... :D True, although the skyhook is attached, at 0:32 you can clearly see the pilot is deploying the reserve, not the main (/skyhook). This is the part which is strange, since the skyhook effectivly didn't work. I personally like the slow-mo better, and by my judgement at 1.18 there doesn't seem to appear a twist yet, (especially when you look at where the twist later is) The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

Strange, the Skyhook didn't work in your case. The main is long gone, and the bag is still around the reserve. Also you can see the pilot is extracting the bag, not the main. Furthermore at line stretch the twist isn't there yet, it is started after canopy deployment. Lastly, you do not arch (seen by the image of your lower body) and yet you want to delay your reserve deployment, for what? The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

and let's not forget the argus! :D The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...

The fact that you mention no information at all, about this (mis)fire. And conclude that one should buy a CYPRES, Makes one wonder. You could give more information and then state you don´t like Vigil, and think one should buy CYPRES or Argus. The trouble with skydiving; If you stink at it and continue to jump, you'll die. If you're good at it and continue to jump, you'll see a lot of friends die...