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Another Pass at the Personal Jetpack
Engadget is reporting that dreams of a personal jet pack may not be quite as distant as you might think. Skywalker Jets, created by Rick Herron boasts a 90-pound jet pack capable of propelling a 200-pound pilot through the air for about five minutes without the hassle of charred lower extremities. The production model, which he hopes to run past the FAA soon for approval, will only cost you somewhere in the neighborhood of $200,000 — so start saving your pennies.
This uses air-breathing jet engines. It's a jet pack.
-Isaac
I am not a lawyer, and this is not legal advice. For Entertainment Purposes Only.
This personal helicopter can be flow for an hour or so and travels around 55 mph. Not as sexy as a jet pack, but it's far more utilitarian.
I get upset when my fully loaded Cessna 172 only fits 4 hours of fuel. I can see getting by with two, *maybe* one hour of fuel in a jetpack. But seriously - what can you do in 5 minutes?!?
It's not even enough to consider a form of commuting; you can barely accomplish any task that wouldn't be done easier with a helicopter/climbing ropes/scissor lift, plus the huge pricetag...
For most aircraft, FAA requires your flying vehicle to be able to get you to your destination with 30 minutes of backup fuel for delays, emergencies, or unforseen weather. Having a 5 minute flight time kind of negates all that...
At best, I see this as a backyard novelty at worst and an airshow wonder at best.
http://www.sixchuter.com/
next question?
Take the 90-Day Challenge! http://rwmurker.bodybyvi.com/
Divers can do a safe ascent without air from more than 60 feet, if needed. If diving with a buddy (generally recommended), you can breathe off the buddy's extra second stage (octopus). Watch a fellow in a jetpack run out of fuel at 60 feet and I think you'll see the difference.
P.S. It is important to note that Mr. Herron holds the trademark for "Skywalker Jets". If you're interested in finding out more about trademarks, or searching the database, go here
I'm not fat, just big boned...
The difference is the margin of error. Basic scuba diving certification teaches you how to free ascend with no air from the deepest dive you'll ever make without a backup air source (~100ft: beyond that and you start doing things like taking a backup "pony bottle" air source). In a true panic situation where you can't swim up with the air you have left, you quick-release your weight belt, start blowing out (yes, blow out!), and your natural boyancy will take you to the surface -- without weight you'll go up pretty fast. Dropping weights is only for true emergencies -- usually you can just swim up since the air in your lungs will expand as you go up, making it surprisingly easy to ascend even from relatively deep dives without additional air.
Soo, to answer your question:
forgetting to check your compressed air: lose weight belt, feel stupid
forgetting to check your jet pack: crash and die.
Big difference.