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----- Original Message ----- From: "Bill Wade" <super_chipmunk@roadrunner.com>
To: <lml@lancaironline.net>
Sent: Saturday, January 12, 2013 10:17 AM
Subject: [LML] Re: LML roots
I agree. I've never used an oxygen system before but would like to install an emergency system in the IV-P I'm building. For starters, if there was a rapid decompression at altitude how quickly can a system be activated? Mask or cannula- should they be worn around your neck and plugged in just in case? Flow adjustments- I don't know enough yet to even ask intelligent questions. Thanks- Bill Wade
Hi Bill,
Here's a good chart for the "time of useful consciousness," which is how long you can expect to be functional without supplemental oxygen at various altitudes.
http://en.wikipedia.org/wiki/Time_of_Useful_Consciousness
A rapid decompression reduces the times shown in the table by about half. If you are at flight level 250 and have a rapid or explosive decompression, you have maybe three minutes or a little more to get below 10,000'. If you're in the mountains, in IMC, you might not be able to rapidly descend below 15,000'.
I don't have the benefit of pressurization in my Legacy, but if I did, I would have oxygen immediately available when flying in the flight levels. And I really do mean immediately.
Dennis
Legacy 560 hours
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