Thursday, March 8, 2012

Avalance Airbag

Here's something new to me, an avalanche airbag. In February three skiers died in an avalanche near Stevens Pass in Washington state. A fourth skier survived and some credit the "avalanche airbag backpack" she was wearing. One website describes their product as,
"In the event of an avalanche, the air stored in the high-pressure cylinder is released by simply pulling the handle. A combination of compressed air and a Venturi effect inflates the airbag in just 3 seconds.
Once the airbag has been inflated it protects the victim from shocks while simultaneously pulling them to the surface thanks to the inverse segregation phenomenon."
The inverse segregation phenomenon means that, all other aspects being equal, large objects tend to move upwards during mixing. Consider a can of mixed nuts, during shaking a peanut can fall into a small space created underneath while a large brazil nut cannot; so the large nuts "float" to the top over time.

Airbag makers are claiming this also applies during the mixing of snow and rocks during an avalanche but I fail to see how the airbag makes a person that much larger. I find it more believable that the airbag lowers your total density making you more likely to "float" upwards (but that's not called "inverse segregation").

Bottom Line

If you enjoy off trail mountain hiking and skiing consider an airbag backpack. But be warned they are not cheap. Costs have recently come down to $600 to $1,000.

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Friday, January 2, 2009

Fear as a Motivator

"The only thing we have to fear is fear itself" - FDR

A recent article in the Christian Science Monitor, Survivalist businesses surge in uncertain times, noted that one business that is doing well during our recession is the business of selling survivalist goods.

"Once seen as a radical and paranoid ideology, survivalism is expanding as a business, and growing fast. Lehman's, an Ohio retailer of home self-sufficiency equipment, has recorded large sales increases, with water-pump sales up 95 percent and sales of home agriculture equipment up 50 percent from last fall. "

(BTW - if you're ever near Kidron, Ohio visit the Lehman's store. It's in the heart of Ohio Amish country and specializes in "old fashioned" equipment because that is what the Amish live by. Hurricane lanterns, wood burning stoves, hand cranked washing machines - it's like a museum but you can buy what you see. We bought some syrup for home made rootbeer, wicks for our lanterns, and other spare parts.)

"Fear is a factor that often draws people into preparedness. Pandemic, economic disaster, climate change, world war – these are some big-picture threats that some folks want to be able to counter."

"... but there are many more in America who are simply involved in preparing for down times, lean times, or disaster," says Mr. Rantala, a former US intelligence analyst. "It's logical. It's common sense."

I agree! See New Year Predictions?

Bottom Line

Doug Ritter, executive director of Equipped to Survive, says people need to be serious about how they go about purchasing peace of mind. "Are you willing to bet your life on a piece of equipment?"

Personally I recommend buying simple things that work like Cooking with Cast Iron. And also Learning Survival Skills. Diversify and have backup plans, don't put All your eggs in one basket.

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