skydiverek

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Everything posted by skydiverek

  1. "The An-2 has no stall speed quoted in the operating handbooks (the stall speed being the speed at which the aircraft is travelling too slowly for the airflow over the wings to keep it aloft). Pilots of the An-2 say the aircraft can be flown in full control at 30 mph (as a contrast, a modern Cessna 4-seater light aircraft has a stall speed of around 55 mph). This slow stall speed makes it possible for the aircraft to fly backwards (if the aircraft is pointed into a headwind of, say, 35 mph, it will travel backwards at 5 mph whilst under full control)." Check this out!: http://www.youtube.com/watch?v=PUnwAubs_70 "If the engine quits in instrument conditions (blind flying when you can't see the ground) or at night, the pilot should pull the control column full aft (it won't stall) and keep the wings level. The leading-edge slats will snap out at about 40 mph (64 km/h), and when the airplane slows to a forward speed of about 25 mph [40 km/h], the airplane will sink at about a parachute descent rate until the aircraft hits the ground."
  2. Does the opening altitude mean the PC RELEASE altitude, or FULLY OPEN CANOPY altitude? Big difference ( + - 1000 ft)...
  3. Read and watch... : http://www.liveleak.com/view?i=49f_1172526096 Please respond...
  4. Crosspost of Crossfire incident deleted. Please do not crosspost.
  5. Here is the manufacturer's website: www.robnik.com
  6. Here: http://www.jumpshack.com/research.htm
  7. Here: http://www.velocityrigs.com
  8. Below is my post from a different thread. I think it is relevent to this thread: Dacron lines - they strech more than Microline and have more friction when the slider grommets slide on them. Here is Performance Designs' opinion on them (from their website): "Why would anyone want to use Dacron line on their canopy? Though most people prefer the lower bulk and drag of Microline or Vectran, Dacron is often the best choice for some applications. Dacron is a fairly elastic line, so it gives a little when there is a sharp "spike" to the opening force. This elasticity won't change the really good openings very much, but it can take the edge off those occasional abrupt openings where your packing was a little off or your airspeed was a little high at opening time. Dacron may be preferable in a student operation, where unusual body positions can compound opening issues. Some camera flyers with very heavy helmets also prefer Dacron lines. Older jumpers, who may not want to subject their bodies to hard openings, may want Dacron to help reduce the impact should something get a little out of control at opening time." Also, Bill Booth made some comments on that issue, too: "Spectra (or micro-line) is strong and tiny, so it reduces both pack volume and drag , which means you get a smaller rig and a faster canopy. Unfortunately, It has a couple of "design characteristics" (this is manufacturer talk for "problems") It is very slippery (less friction to slow the slider), and stretches less than stainless steel. This is why it hurt people and broke so many mini risers when it was first introduced. Now, I must say that the canopy manufacturers did a wonderful job handling these "characteristics" by designing new canopies that opened much slower than their predecessors. However, the fact still remains, that if you do have a rare fast opening on a microlined canopy, Spectra (or Vectran) will transmit that force to you (and your rig) much, much faster, resulting in an opening shock up to 300% higher than if you have Dacron lines. (It's sort of like doing a bungee jump with a stainless steel cable. At the bottom of your fall, your body applies the same force to the steel cable as it would to a rubber bungee cord, but because steel doesn't stretch, your legs tears off.)" Moreover, you can opt for lighter, brass slider groomets, instead of heavier, stainless steel slider groommets. Lighter mass equals less momentum (speed) down the lines. BTW, Precision Aerodynamics favors them, saying they contribute to softer openings. Also, on their website Performance Designs says that "larger Spectres open slower than the smaller models". So, to sum up, my perfect choice would be large Spectre, Dacron lines, and brass slider grommets. Careful packing and deploying at no faster than 120mph (and not while tracking, especially steep tracking) will help, too. Some people also say that Psychopacking helps, but I am not sure about this.
  9. Here: http://www.youtube.com/watch?v=fJuNgBkloFE
  10. Plus, you will be pulling a reserve pin from the running start, because of the "slack", similar as in the standard reserve cable. So that functionality is retained, with the advantage that the "slack" is not dangling below inside the reserve handle (read: end of cable with a ball). Also, on the slack issie, from Bill Booth in 2004: "I have learned that if you pull "quickly", from a "running start" (slack in the cable), the pull force necessary to open the same reserve container is up to 300% lower than if you apply the force gradually to the handle. Most riggers only have a spring loaded fish scale, and therefore must apply pull forces gradually in order to read the scale. So, what reads 30 pounds on the fish scale in the loft, will only be around 10 pounds when you actually pull your reserve in an emergency, because I don't know of anyone who applies ripcord pull force "gradually" while falling rapidly toward the earth."
  11. I didn't found any info on the Sun Path's site. Can you please advise? Not on the website yet, but you can get it now. Contact SunPath
  12. It is available on Javelins NOW ($250 extra).
  13. Can you interview Sunpath (Javelin: most popular rig in the world), Velocity Rigs (Infinity: small company, great product and service), Sunrise Rigging (Wings: larger company, great product and service), Icarus Canopies, Precision Aerodynamics, Argus (the new AAD)
  14. ALL videos are here: http://www.youtube.com/profile_videos?user=VASSTTraining plus, you can actually SAVE them to your desktop using this website: http://www.downloadyoutubevideos.com
  15. Bill Booth in 2005: "My new Spectra ripcord is "stiff" enough to thread easily through our stainless housing with no tools. It is only about 14" long, and with no pin on the end."
  16. does that mean there is actually no cable, but a line instead ? Correct. It was displayed by RWS at the 2005 PIA Symposium. I had it in my hands then. 1000 lbs Spectra line, I believe. Check my post from Jan 29, 2005
  17. He was in 3 movies (he told me that personally): 1. The Firm (the seaplane pilot, says one word: "Hello"
  18. "Does canopy COLOR influence/increase pack volume?" THREAD here: http://www.dropzone.com/cgi-bin/forum/gforum.cgi?post=885302#885302