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Everything posted by mark
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You are thinking of Bill Gargano's Hobbit and similar, designs he sold to Strong. The Hobbit was diaper-deployed (no freebag), so could be installed in containers originally set up for 2-riser rounds. FTS/APS designs probably owe more to Mike Furry/Django. That very wide bottom seam was characteristic of Mike's canopies, and is still seen on some Precision canopies in service these days. Mark
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TSA Incident Report - ORD 10.10.2006
mark replied to gravitational's topic in General Skydiving Discussions
According to the diagram you attached, there is a "propellant" in the cutter assembly. There is nothing about an "explosive charge." This may be a just a semantic distinction, but there is an important psychological difference between these two terms. If you say "explosive charge," you conjure up an image of firearms or TNT. If you say "propellant," the more likely image is an aerosol can -- or just compressed air. Mark -
The photo is by Ray Cottingham. Skies Call 3 is copyright 1981 by Andrew C. Keech. Mark
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Skies Call 3, photo 31. Mark
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Do they make a 2-pin model? It's not in the Para-Gear catalog and I can't find a reference after my (admittedly cursory) check of the FXC website. Mark
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Woodstock School, Mussoorie, Uttar Pradesh (then, now Uttaranchal), India Mark
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So if I count five or six seconds for the opening, the opening will have taken 1000 feet? If I really do fall at freefall speed until the end of the 1000 feet, wouldn't the opening hurt a lot? Mark
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Who is negligent for poor gear rental?
mark replied to justnalias's topic in General Skydiving Discussions
I don't know what rig the OP is writing about, but this is from the Mirage price list (other manufacturers similar): ... freebag and bridle: $80 ... reserve pilot chute: $120 ... metal-handle reserve ripcord: $95 ... cutaway handle: $40 Total: $335, which leaves $65 for shipping and the reserve repack. Mark -
So what I hear you saying is: -- the DZO needs help -- "THAT GUY" is helping -- you want "THAT GUY" to leave -- so the DZO will be even more short staffed -- which will make the DZO happier -- and will make you happier, too. Do I have that right? Here's my suggerstion for doing something indirect to get rid of "THAT GUY": Help out the DZO by doing the things "THAT GUY" is doing. Are you already doing that? Mark
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So there is something to this global warming thing after all. Mark
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The USPA Governance Manual is available as a pdf file: http://www.uspa.org/publications/manuals.pdf/Gov.Man.April06.pdf. Ballots are printed in Parachutist and IIRC are also available for download. That hasn't happened yet because we're only just past the filing deadline. Mark
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Five lines on the front riser is correct. The center "A" and "B" lines are continuous, not cascaded. The photo shows four lines plus the steering line on the rear riser, also correct. Mark
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Well, I figured you would know! I had the manual open when I posed the question, because 115 fps seemed a little high. I'll agree that it's hard to get a road-bound automobile into a descent with a 45 mph vertical component. Mark
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Do either of you know what the vertical speed should be for Vigil activation in student mode? Mark
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The example you cite is an argument against using AADs in general, because the risk of two-out increases when someone pulls low, and some two-out situations are fatal. From the information provided, my guess is that a Student Cypres (and possibly an Expert Cypres) would also have fired in a similar situation. I don't think you can use this incident to indict Vigil. Mark
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Your wrong. Their breaks, and there used to effect canopy flight after the drouge (or pilot shoot) are released. (Sorry, couldn't resist.) I need a bigger yolk on my rig; my brains are scrambled. Mark
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The analogy does not apply. Aircraft may fly with some inoperative equipment, but until Airtec changes its instructions, an out of date Cypres may not be jumped. FAR 105.43(c) is explicit: "If installed, the automatic activation device must be maintained in accordance with manufacturer instructions for that automatic activation device." The FAR for tandem jumps adds that the AAD must be armed. Mark
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Yes, but the FAR's actually support Cliff's point. If the prop has an upcoming AD "must do by" date or will time out soon, it is still legal to fly until the "must do by" date on the AD, or until it is timed out. The annual or 100-hour can be signed off even if that required maintenance is due before the next scheduled service. Same goes for the ELT battery, static system, and transponder. Mark
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"Next repack due" is okay. Take as many lines of the data card as you need for whatever you need to write; ink colors like red or green really stand out. Back dating? I wouldn't do that on a legal document. Mark
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Ditto: riggerrob. From the OP example, the Cypres is good until 31 October, that is, until 31 October it will have been maintained in accordance with the manufacturer's instructions. On 31 October, the reserve pack will be less than 120 days old, so the reserve is legal until that date also. The entire system is legal until 31 October. A notation on the packing card is sufficient to identify the end date of a normal pack job, and should be sufficient to identify the end date of this legal pack job, 31 October. Mark
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It seems to me that friction of cables inside curving cable housings would be a substantial part of the total resistance. I don't know what the facts are, though. You and I disagree about the distribution of drag forces acting on the cutaway cables in actual use, but we're both in "seems to me" mode. Do you know of any tests, studies, or manufacturer's statements that address the issue? Thanks, Mark
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IIRC from the last PIA Symposium -- and as I read the pdf file on Aerodyne's website -- the 57% max (average 37%) reduction was measured at the white loop, not where the cables emerge from the housing at the breakaway pillow. If so, they measured only part of the total pull force; the actual reduction in pull force would amount to only a few pounds. Mark
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That would be me. 15 pounds is the maximum allowable pull force, but it's easy to create a much higher pull force by bending the pins. Mark
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I stand corrected. I see it's on the same Poynter's page as the Thunderbow I packed up yesterday. Mark
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Bill Gargano's design (and he's still active as a canopy designer on the para-glider/powered parachute side); later Strong Enterprises. The Hobbit was also TSO'd for use on 2 or 4 risers. Pioneer X-210R was also diaper-deployed and had a p/c attachment. Mark