alberto1980

That's why they may be beneficial. If a wing is superclean and well designed, no need for VGs

I think those are just the scoops to inflate the wing. I am talking about VGs on the fabric close to the leading edge (in this case the arm of the guy/girl). basically they are little wings at an incidence to the LOCAL flow angle that, due to their low aspect ratio, produce a vortex that mixes high momentum air at a distance from the suit towards low momentum air closer to the suit, thus creating beneficial effects. Hey I am not telling they work on a wingsuit, I said they might, since they do on rigid wings. It would be cool to see. BTW, you can also sometimes find them at the rear ends or upstream of gaps on large trucks. they use them to reduce drag, since it pays off for them in terms of fuel. About the installation on a wingsuit, I guess they could be glued on the fabric in the correspondence of the ribs. they could be made of fairly rigid rubber. just speculating..

The purposes are many: decrease drag in areas of flow separation, increase the maximum lift coefficient, improve handling characteristics during maneuvers. I am not a wing suit flyer but I have experience with VGs on aircrafts wings and I think they have some potential on wingsuits as well. If somebody wants to try I could give support, it would be very interesting.

Hi, has anyone ever tried to put vortex generators on a wing suit? If yes, what was to performance gain, if measured?

Please read everyone, I am just quoting: In all industries, there is a fundamental trade-off between production and safety. When accidents are infrequent occurrences (as they generally are in systems such as health care where accidents can have high consequences), production goals begin to dominate over safety goals. This is partly because improvements in production are often easily measurable and rewarded by the organization, whereas improvements in safety are indicated by the absence of outcomes, which are hard to measure and reward. It is only after a bad accident or a frightening near-miss that safety becomes uppermost in the minds of those who manage an organization. The stereotypical pattern of "drift toward failure" can be seen in hindsight after nearly every accident. Managers of an organization realize that production and safety both are necessary long-term goals. Nevertheless, in the short term, line managers are forced on a daily basis to choose whether or not to cut safety corners in order to meet operational demands (e.g., should we assign 3 patients to one nurse in the SICU today because we are short-staffed or should we cancel scheduled surgeries in order to maintain a ratio of 2 patients to a nurse?). For the most part, such short-cuts bring no bad effects, and so become an habitual part of routine work practices (even though they don’t tend to be reflected in official "standing operating procedures"). As time passes, the safety margin is gradually diminished during event-free periods until an accident occurs. Acknowledgment: Parts taken directly from Reason (1997). Managing the Risks of Organizational Accidents. Ashgate Publishing Company, pp. 4-5.

Hi There! anyone going to perris from LA on January 28th? I need a ride there! Also need a ride back on February the 1st in case. Deal is: I buy you an airlift ticket.. plus nice company on the road! contact me here or sms 206 371 4760 cheers

Hi, anybody can give me feedback on their EXPERIENCE with the Contour HD camera? How`s the quality of video compared to a Sony CX100? Thanks a lot ps: please no rumors, just if you have direct experience :-)

How is this possible, I don`t get it: http://www.uspa.org/NewsEvents/News/tabid/59/Default.aspx#10148 The pin is not sharp and the bridle nylon fabric is tough. But apparently it happens. Good habit to leave some slack then.

Thanks for your suggestion. I already called PD and they told me to try with a hose spraying inside the cells, but I also read that it`s not the best to get the canopy wet due to different materials and the way they shrink back when dry, as you also tell. Apparently also PD does not know what to do in this situation; they are trying different things on canopies with sand they got back from Iraq. I hanged the canopy and brushed the sand off as much as I could. The airlocks do not help here I must say. Thank you

Hi, I have a PD vengeance airlocked canopy, landend in sand and now I am trying to get rid of the sand inside the cells, but I do not know how? Any hints? Can I wash my canopy with a water hose? Is it safe for the material? I do not think leaving sand inside is good for the material either. Thanks for any suggestions everybody

The answer is simple: holes at the trailing edge = drag = less efficient canopy. What`s the point of having zero p, microlines and collapsible chute and slider if you then make vent holes? Don`t.

Thanks to everybody for the suggestions. I think I will stick to the safe side. Blue skies

Hi there. Just looking for some advice. I have to buy my own gear and I am undecided on the size. I have 60 jumps, weight 75 kg and I was thinking about a 170 sqft main like a Sabre 2. Then I spoke to many experienced skydiver they say they would go for a 150. I already tried a 170 and it was fine. Do you think a 150 would be safe for my experience? So: 150 or 170? please help..