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northcave

Jump the Jet - opening heights

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Does anyone besides me remember doing 727 jumps at Quincy in 99? I recall that the exit speed on the last pass for the jet was approaching 240, and they were doing 10-way speed-star competitions out of it...It was a kick-ass ride!!!



Our video was one of the early digital cameras.
It would try to adjust for the change in pixels and the
picture was changing too fast for the camera to keep up.

We had 9 of us together in 19 seconds, but one guy
was low about 4 feet and we ended up with 23 seconds.

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The jet flies much faster than your standard jump planes. There is a lot more horizontal separation than you might think.

When I jumped it at the WFFC last year there was plenty of separation and we exited one right after another as you described.



Plus during briefing tracking directions are discussed to avoid anyone track up or down jump run!

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> ....We were there for the first year, (I think it was 92)




Correct, it was 1992. I was on the very first load. Mix up in signals from the cockpit had us departing too early. 205 mph @ 15,000' and a couple miles from the airport. A litteral blast! People lost all kinds of gear on that pass. Still had an awesome time. I jumped it again on the second (maybe third) load the next morning.

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>For the half second northcave mentioned to be enough separation, the jet
>would have to flying really fast.

Well, it runs it at 140kts, which is about 185mph groundspeed on a no-wind day.

Wouldn't 140 kts= about 155 mph rather than 185???
Might be wrong, but I thought the 727 at Quincy had an exit speed of about 160-165 kts, which would be about 185MPH
This is the paradox of skydiving. We do something very dangerous, expose ourselves to a totally unnecesary risk, and then spend our time trying to make it safer.

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