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mark last won the day on October 12

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  1. mark

    JumpShack AKA Parachute Labs, Inc.

    You might try their rigging school, Parachute Rigging Institute: --Mark
  2. mark

    Fliteline Reflex Res. Closing loop

    The only critical measurements are the ones marked 2.5" and 1.5". The 2.5" measurement is the distance from the grommet on the edge of the cap to the grommet in the center. This distance must be long enough that the fingertrap section is entirely below the center grommet. The 1.5" fingertrap section used for loop length adjustment can be a little longer if pack thickness allows, but cannot be any shorter without risking loosening during the pack cycle. Instead of the usual Cypres knot, you can make a small (0.5" I.D.) loop at the end of the closing loop, and secure using the no-sew method. The length of the fingertrap for this small loop should knot exceed about 2", so it won't interfere with the fingertrap section used for adjusting loop length. Larks-head the small loop to the Cypres washer to get a more solid anchor than the usual double-overhand + single-overhand.
  3. The factory mark is set at a little more than 23 inches, so you're about 6 inches short. You'll probably be able to stall it, but you might not get full flight out of it, and the canopy is likely to buck and shudder if you try conventional front riser dives.
  4. mark

    Main Pilot Chute Question

    When the pilot chute is collapsed, how much kill line is there between where it is tied to the base of the handle and where the line disappears inside the bridle?
  5. mark

    Crossport fraying?

    Leave them alone. Usually the fraying is just in the corners of the crossport, so it starts to appear more rectangular. If you do nothing, the fraying will tangle, which slows down the rate of future fraying. Do not trim the fraying with scissors or hot knife, since this just results in a place to restart the fraying. In an extreme case that the crossport might possibly tear from top seam to bottom seam, but at most this just puts an annoying turn in the canopy. I've seen this with a couple tandem canopies, and the instructors have jumped them for 8 or 10 jumps before realizing there really was a turn in the canopy that might need to be checked out. Save your money and go jump.
  6. Do not change your decision altitude. You should not depend on the Skyhook or any other MARD to open your reserve canopy more quickly. Most of the time they do, but sometimes they don't.
  7. mark

    Glide Path Nova

    Okay, if you must. Do not attempt to land it.
  8. mark

    Packing innovations

    You're almost there already. The canopy doesn't have to be flaked to get a decent opening, and it will crush into the same space it will fold into. Get a canopy that doesn't need the brakes set, like Icarus tandem canopies. I'm not sure how to handle keeping the bag closed, but we've done some experiments with no-bag deployments (although the fact that we're still using bags tells you those experiments didn't work out well). The lines don't really need to be stowed in rubber bands; for years we just coiled the lines in the container, then put the canopy on top of the coiled lines. For closing the container, I'm imagining a electrically powered tool like a hand drill instead of a crank ("positive leverage device"). I wouldn't worry about getting the loop too tight, because I've seen a mechanical, jumper-activated loop cutter on a parachute -- Sandy Reid has a WW2 Italian device. You wouldn't be pulling the pin with a ripcord or a pilot chute, although you might use pilot chute drag to trip the mechanical cutter. You'd either need to replace the loop at every jump, but that's something the packing machine could just make from a spool of line.
  9. mark

    No Pilot Chute Belly Reserves

    Partial malfunction: Hold the container flaps together with left hand, pull ripcord with right hand. Throw ripcord away. Peel back flaps. Take canopy and big wad of lines, throw down and in the direction of spin. For a really slow malfunction, might have to shake the reserve a couple time before it's interested in opening. I've done this. Total malfunction: Airborne tuck/fetal position. Pull ripcord. Assist canopy into wind if necessary. I've never done this.
  10. The museum's collection is currently housed at Sunpath.
  11. mark

    Smallest chest mount reserve?

    I'm going to guess it's Jeana Yeager's 22' Phantom in a custom Butler container, used in the 1986 Voyager around-the-world nonstop unrefueled flight.
  12. F-111 or F111. It's named after the Aardvark.
  13. The 2015 PRH had several different authors. Jump Shack got that section.
  14. This is a number from Jump Shack/Racer, and is merely asserted without providing without a source or reference. Although the 2015 PRH implies that the same number applies other rigs, there is no way to to know. There is no TSO requirement.
  15. mark

    New Reserves and Packing Data Cards

    There is no FAA or PIA policy for the old packing data card to go with the reserve canopy. There is just a reference (I think) in Poynter's Parachute Manual about sewing old cards to new ones. I disagree with RiggerRob, because (a) it doesn't matter for the inspection what is written on the data card, and (b) writing extra stuff on the data card creates additional liability for the rigger who records it. But Rob is Canadian and I'm American, so we might have different perspectives, and there might be different legal issues and requirements.