Martini
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Everything posted by Martini
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Thanks for all the input guys, it's good that most of us understand what's up here but for those stubborn ones out there a source outside this forum (or a nice professerly bit by Quade) would be helpful. BTW, it's tough to explain to a pilot all about ground reference when he insists he trims differently up/downwind at 10000'.
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Does anyone know of info regarding canopy/airplane flight in wind that I can print out to try to convince skydivers and pilots that there is no such thing as a downwind stall, airplanes don't have a faster climb rate (once aloft) when pointed "upwind", canopies don't dive faster when swooped downwind and in fact that in a stable moving airmass there IS NO WIND for airplanes, canopies, balloons, birds or anything else up there because you are drifting with the moving air all the time no matter which direction you fly? I could use a source or two with better explanations than I can give.
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Wow, all these great ideas brewing and not one bottle open! My $.02: The shock absorbing concept is by far the most reasonable one for several reasons; it's simple, cheap, available technology, it requires no user consideration, and most importantly will work just fine even in the case of a high speed /low altitude deployment without dependence on complex AAD technology. Six-foot long shock absorbing lanyards are installed on virtually all fall-protection harnesses used in the construction industry today. Granted, skydiving gear has radically different requirements, but I suspect the technology is at hand to at least begin to improve high-speed reserve openings.
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The inverse relationship I was referring to is in fact fast airspeed = slow opening and slow airspeed = fast opening. Yes this is, or should be, the holy grail of reserve openings unless you are at high airspeed and also low altitude; you need a fast opening here regardless of airspeed. This is the only exception I can see to the "ideal" reserve, and it would require a special AAD setup. Otherwise I think that a reserve can be built to open inversely using relatively ordinary principles/materials. But now that I think of it the dependency on electronic devices if I need a canopy while fast and low isn't something I would allow in my own rig, so I guess I'll stick with simple technology that gives me a reserve opening that's fast and reliable. Now if we can just get rid of those damn rubber bands........
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So all you genius manufacturers and riggers out there are telling me that a reserve can't be built with inverse opening speed to airspeed properties? I'll bet that a bunch of ordinary skydivers with enough beer could come up with a dozen decent ideas in one evening, one or two of which might even be practical. Fuggetabout complex reefing/timing/pyrotechnic devices, we're talking reserve here. Keep it simple or it aint gonna fly. Yep, going really fast really low still requires special treatment too. Do I have concepts? Depends; who's buying the beer?
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I've heard of people losing Dytters from outside helmet mounts. I just mounted a Pro-Dytter outside a Gath helmet using the clip provided by L&B. Anyone have ideas on how to make it more secure but still removable to switch to another helmet? (My other helmet has an inside pocket so I'll leave the clip on the Gath)
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Hey Rob, so what's up with you and Bill Coe that keeps you from jumping a PDR? The one in my rig is there based on "research" of lots of user and rigger experience. Is there something else I should know?
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I contacted PD regarding their reserve policy and was told that a PD reserve is rated for 40 repacks or 20 jumps, and then was to be sent to PD for inspection/evaluation. If within their standards it would be recertified for an additional period. (this period was not specified, obviously it depends on canopy condition). Manufacturer's inspection of a reserve that might have been in use for 13 years sounds like a reasonable idea...... This info makes PD reserves sound like a better investment as I thought they might only have an 8 year lifespan. Thanks to all who responded previously.
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I understand that PD reserves are rated for only 25 repacks. That's about 8 years, less if you jump 'em. If true this means they cost about $110 per year to own. (kinda like a Cypres) It would also mean that a PD reserve made in 1995 is just about worthless except as a funky main. Aside from being arguably the "best" reserve around, why would you want one?