Skyper

He might have been better of as the reserve might not have entangled his main, and the departing main entangled with the reserve pc could have acted like a MARD/Skyhook. [might/maybe] maybe-- but I highly doubt it. The bottom line, his main is what ended up saving his ass, if it were cutaway, it is very likely it would have ended differently. I wonder what would have happened if he reached with his hand back and pulled the bridle and release the pin of the main. How big is the chance that the main would open correctly?

Human tolerance of g-force

if you need 3 seconds for one full rotation your angle speed of 120 degrees per second. With 4m radius centrifugal acceleration is 1.79g if you need 2 seconds per rotation for other parameters the same it's 4.02g 1 second per rotation (360 degrees) it's 16.1g

The physics behind it is centrifugal force: Fc = m*v^2/r Fc= centrifugal force (can be used to figure Gs) m = mass (kgs) v = velocity (m/s) -- need to convert from RPMs to m/s r = radius (m) Cheat calculator at : http://www.calctool.org/CALC/phys/newtonian/centrifugal Shorter lines say, 1m, 1 RPM 60kg diver Fc = 60 kg * (6.28 m/s)^2 / 1m Fc = 2368 Newtons Gs = 4.02 Longer lines, say 4m, 1 RPM 60kg diver Fc = 60 kg * (25.12 m/s)^2 / 4 m Fc = 9474 Newtons Gs = 16.1 The short of it is, take the difference in the lines and multiply by 4 and that will be how many extra Gs the longer set will have, given same RPMs. how did you come to: v=6.28 m/s? v=25.12 m/s? r=1m? r=4m?

This last case is indeed "only 1", but please don't forget that most similar cases are probably never reported. Bill, I think your wording is better than mine. It should not be mandatory, but instructors should be able to advice AFF studends to do tunnel/SL or whatever other trainings prior AFF to prevent this things from happening. I have a feeling that "a real' jump is favorized by DZs which from the short therm financial gain perspecive is easy to understand. But from the perspective of safety and long term value for DZ it's shortsited standpoint. Students must be triggerd to use all means to improve their flying abilities. p.s. I'm not affiliated with any wind tunnel or anything related to it.

Please beware with pseudoephedrine. That drug is forebidden in some EU countries because of the high risc of addiction and causing the heart problems. It works only on the symptoms and not on the real cause of the problem. Don't jump when you've got cold and check your ears (clearing) after every jump, imediatly after the landing, or even after opening. During the fall yawn and swallow often.

Following the latest incident whereby an AFF student suffered femur bone fractures due to unstable opening position, I made a statement that a minimum wind tunnel time should be mandatory for AFF students. AFK didn't really agree with me, saying that ppl will need to make long distances to reach the tunnel and tunnel time is not cheap either. In the future I foresee more and more wind tunnels and this will hopefully bring the price a bit lower. When it comes to safety, I honestly think that the guy mentioned in the incident would make more chance for healthy legs if he had only 15 minutes of the tunnel time prior his AFF course.

maybe you should try two of them while in the downplane

Not ALL systems have a deployment bag, but there are plenty of rounds (static line and freefall) with bags, and many more with diapers. I thought so. Back sliding was advised to me by an "experienced skydiver" to lessen the preassure on my back during the opening. So I did it several times and it works, but obviously this position introduces some other problems which I was not aware of...

how the canopy is pulled out of the container and bag is basically the same. Obelix with all due respect for your experience, but there are large differences in deployment sequence of round chute and wing chute. To start with - round chute does not have a deployment bag at all, at least not those I´ve been jumping with. I do agree with you that sliding backward position during deployment might be good. At least to lessen the pressure on your back during the opening shock.

leave too long unstowed lines and you make a chance for very nasty horseshoe malfunction. leave too short unstowed lines and you make a chance for line twist.

it's part of dzo's job to watch who is going into the plane and to prevent the hazards. and each and every student should be considered as hazard and deserves additional attention and checks. edit: and I never heard of assumption that the studends are able to regulate themselves.

chance of this happening is so small that this subject is not worth discusson. I'd say beware who do you allow to pack your reserve.

just to give an plus for everything skydiverek, Twardo and others posted inhere. I´m using earplugs from the second free fall jump and I´ll keep using them till my very last jump. It´s interesting thing that with the earplugs I have now I can even hear ppl talking during the free fall :D because the noise is damped more than a human voice. It´s so funny thing :D

if they can fit 50 way in there they can fit it in an cessna as well :D

What was your wingload and what was the canopy size?

how much horizontal separation did you guys have?

there is wind and there is also a low turn.

it's not about the license. it's about your skills. in skydiving don't do anything if you don't feel comfortable about it and don't rush things and set too high goals. skydiving is a great sport, but it can also be a highway to serious injury or death. Try to enjoy it first before you rush to some "achievements" like a-license or others...

if it´s close to border they can fly the heli from france to spain... Thus you get free ride in French heli... I don´t think it´s more than 6000 euro either.

I assume 6000 euro is enough for French ambulance to drop you just over the border to Spain...

No a club doesn't, but in most parts of the western world there are quite strict laws on how business cater for the safety of their clients - rather than the pleasure of their clients. The laws are generally there to temper the desire to make money at all costs. desire to make money is something different from the desire to improve skydiving as a sport. parachuting becomes "tandem" and "aff" money making machine... and if you relay on "law" to regulate safety you're shifting the development of sport to police and to state... away from actual skydivers... IMHO tandem should not be considered skydiving, but money making activity.

I saw similar drawings in the caves of Babylon dated some 2000 years B.C.

I've never seen an incident report mentioning type of head gear used. Did you?

Actually peripheral is all around the edge of the visual field, including side to sit and up and down. Dictionary.com: "of, relating to, or being the outer part of the visual field " notice that when you don't have anything on your head (also no long hair) how wide is the angle of your peripherial vision. try to stand in the stright position and look stright in front of you... in most cases you'll see your chest without a need to move your eye and not to mention your neck. And to the "side" humans are even capable of spotting the objects which are slightliy behind them - again without moving the eye ball. I honestly wonder in how many of canopy collision accidents the skydivers had an FF helmet. Of course it will protect you from bumps during the formation jump but you'll have to pay the obstructed peripherial vision during the canopy flight. imho combination of FF helmet and HP canopy is the ideal one paving the road to canopy collision. and not even to mention these motor helmets which obstruct your p. vision not only up and down but also significantly to left and right...