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Article #261wierd canopies
From: Jim Curl
Date: Wed, 05 Feb 1986 00:35
Date: Wed, 05 Feb 1986 00:35
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About a week ago I posted an article about my concern over a good canopy
going bad on the ride down. I was assured by response postings that this
was a very unlikely occurance provided I did not intentionally stall my
canopy at a low altitude. I ran across the following incident report in
"Parachutist" which has rekindled my fears somewhat:
Age: 28 Sex: F
Number of jumps: 452
Time in sport: 5 years
System: Annex Mirage
Main: Performance Designs PD-170
Reserve: Pioneer K-XX
Type of injury: concussion, fractured cheek, deep laceration of eye
Description of incident:
The jumper was making her approach to the landing area when at about
30 feet the top skin of her canopy "rippled" and the right side rolled
underneath, pivoting the jumper into the ground. Jumper was unconscious
for 10 minutes with breathing stopped for about two minutes until CPR was
administered. Surface winds were reported at 0-3 mph, and no turbulance
had been experienced by others. The injured jumper had made one previous
jump that day, and had about 100 jumps on this canopy.
Conclusions:
The reporter stated that there was little in the area to create
turbulance that may have contributed to this accident, and that the
jumper was not in a turn when this mishap occurred. There were no
listed canopy defects, and although a statement by the reporter
indicates he felt this to be a factor, a conclusion cannot be drawn
without submission of more data. It should be mentioned here also,
that turbulence may occur without apparent cause; it may have begun
some distance away. Also, more data on microbursts and wind shear
becomes available as more funds are provided for research; eventually
we my all learn more about why our canopies "weird out" from time
to time.
If this can happen so easily (albeit rarely) to an experienced jumper,
familiar with his/her rig, should I not be concerned as I am a beginner
using rented gear (often a slightly different rig for each jump)? Or
maybe that's just life in the fast lane...
-- Jim Curl
-- San Jose
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site wjvax.wjvax.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!decwrl!amdcad!amd!pesnta!wjvax!curl From: curl@wjvax.UUCP (Jim Curl) Newsgroups: net.rec.skydive Subject: wierd canopies Message-ID: <650@wjvax.wjvax.UUCP> Date: Tue, 4-Feb-86 19:35:09 EST Article-I.D.: wjvax.650 Posted: Tue Feb 4 19:35:09 1986 Date-Received: Fri, 7-Feb-86 10:11:17 EST Organization: Watkins Johnson Co., San Jose Ca. USA Lines: 41