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homer

How cold is to cold to jump?

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Not to steal Bill Booth's thunder, but a guy who still jumps at Pitt Meadows did a static-line jump onto the North Pole back in the 1960s. JP was a Combat Engineer serving in the Canadian Armed Forces when they were asked to support a geological expedition to assert Canada's claim on the high Arctic. JP spent a few weeks at the North Pole bulldozing runways, setting up tents, refueling tent heaters, that sort of thing.

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In reply to:
talk about lack of depth perception..."
Damn......you get robbed of the ground rush!!!
Weren't there some people who paid the ultimate for that? Don't know the whole story.


Yep. There was a 4-way that went died in Antartica in '95. Actually, only 3 of them died. The lack of depth perception probably played a big part in the fatalities. Also, from reading the fatality reports on skydive.net, the field elevation where they were jumping into was 9000', so it's very possible they had problems calibrating their altimeters/dytters/cypreses to that landing elevation. The Cypres only adjusts to 5000' above the take-off field altitude if I remember correctly.

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"altimeters/dytters/cypreses"
The alti shouldn't have been too big of a problem. As long as the maps are accurate you simply adjust in the difference from where you took off. On the others.....I wouldn't have used those in that situation......But......what do I know with 111 jumps......
"Carb Heat On....Carb Heat On.....Carb Heat On..."-Phil Polstra :)Clay

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The alti shouldn't have been too big of a problem. As long as the maps are accurate you simply adjust in the difference from where you took off. On the others.....I wouldn't have used those in that situation......But......what do I know with 111 jumps......


Depends on the conditions. I went back and reread the article and the details are a bit sketchy, so all we can do is conjecture. But, if for example, the plane took off at a field with a barometric pressure of 30in, and the DZ was at a pressure of 29, even if they set their altimeters to adjust for the altitude, it would still be reading ~1000' higher than the actual altitude. As for the Cypres and Dyter, it depends on the difference in field altitude since they work on AGL rather than MSL. If the take-off and landing are the same altitude, they'll work (in theory) regardless of the field altitude. The Cypres has an adjustment for +/- 5000' between the take-off and landing and take-off sites, but as far as I know, the Dyter doesn't.
Also, in re-reading the article, hypoxia was mentioned as a possible cause of the incident.

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All true....I just read an article about several plane crashes that were contributed to severe changes in barometric pressure between T/O and landing airports.....Don't know how much ATIS info exists in those regions.....
"Carb Heat On....Carb Heat On.....Carb Heat On..."-Phil Polstra :)Clay

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Hay Homer,,, where you at?? Wally World,, Clarkston?? Should come up and jump with us next year in Spokane, (actually Davenport,, ) I wear the same stuff in the Winter I do Skiing,, layers and one piece ski suit,,, it's not the jump that is cold,, it's the friggin packin that bites!! Can't wait ta do a full moon jump with snow on the ground!!

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