The Truth About New Jet Pack Hype

An anonymous reader writes "This week a sub-$100,000 rocket belt was unveiled and will be on sale this summer, but that's the sad thing: it's still not a real jet pack. Here's a fascinating inside look at the human-flight industry, full of law-suit scandals, technical difficulties, fuel-economy woes and endless delays. The good news? It all points to the next generation of rocketeer research, with real applications for medical rescue and military technology actually coming on the horizon. From the article: 'With a little patience, and a little funding, we could actually have the pleasure of grumbling over regulatory issues we never dreamed possible. Like being limited to specific kinds of air strips, because the jet strapped to your back is classified by the FAA as an ultralight. Or being required to wear a ballistic parachute, because Amarena's Thunderjet design could reach altitudes as high as 10,000 feet (and, for the record, speeds of up to 160 mph, provided someone can solve wind-resistance issues).'"

Comments

Jetpacks are just a bad idea

[elrous0]

The problem with the "Jet pack" is that it is an inherently foolish and inefficient idea. That much power, in that small a space, with that many stability issues makes for a nasty combo. Lifting ANY aircaft straight up off the ground and landing if softly in the same way is VERY tricky, even for a well-trained human operator (ever wonder why helicopter autopilots are so rare?). Trying do do that with a small mechanism that can fit on or be carried around by a single human is even more tricky. With tolerances that tight, the slighest windgust or miscalculation could send your jetpack spirally helplessesly out of control as you plummet to the ground.

Just because it looks cool in a Bond movie doesn't mean that it will ever be practical in real life.

Re:Jetpacks are just a bad idea

[veganboyjosh]

I wonder how different the parent post is from what people had to say when they first heard internal combustion engines...

Re:Jetpacks are just a bad idea

[192939495969798999]

Yeah, ever play that game "Lunar Lander"? Now imagine that if you land wrong, you actually die on the first try. I don't know anyone that landed that thing on the first try, and all it has is dumb little 2-d zigzag mountains. Imagine high-voltage lines, trees,etc. and this thing is a one-way trip to the rube goldberg/darwin award winner's list... the most scientifically advanced way to do something extremely risky.

Re:Jetpacks are just a bad idea

[somersault]

All that tension, stress, and road rage, not to mention the speed traps. It is so dangerous and inefficient. Absolutely correct. All you should really need for jetpack commutes in busy airspace is a jousting pole, a good helmet, and perhaps some air to air missiles

Re:Jetpacks are just a bad idea

[Anonymous Coward]

I wonder how different the parent post is from what people had to say when they first heard internal combustion engines...

As seen on the bulletin board in a small English town:

> First!!1!

> I, for one, welcome our new internally combusted overlords.

> The problem with the "internal combustion engine" is that it is an inherently foolish and inefficient idea. That much power, in that small a space, with a highly inflammable fuel makes for a nasty combo. Creating that many small controlled explosions can be very tricky, even for a well-trained human operator.

> And there is the noise. I've been within 100 yards of one in operation, and conversation with the person next to me was impossible. They really are not fit for urban areas.

Re:Jetpacks are just a bad idea

[dzfoo]

I'm pretty sure there's prior art on that. People call him Spider-Guy, or something.

      -dZ.

old school jet-pack movies

[fifedrum]

Two fun facts about this project that were glossed over in the old school movies of these things in action are the NOISE and the short flight times.

The TV series Wings covered the first generation of these jet packs and broke my heart when they revealed the true story behind the promotional movies. The pilot wasn't flying for the whole movie, of course, the film crew filmed a few seconds of flight, the pilot would land, refuel and the whole process was repeated and pasted together in post-production. They also dubbed new sounds over the outrageous screech/howl the original packs made.

Watching the film as a kid, I clearly remember thinking there's no way the thing could fly for that long, but the excitement of seeing a guy fly through the woods overcame my skepticism. Clearly though, even with the new films and fuels, we have the same jet pack, the same limited range, the same ear shattering exhaust note. Nothing new IMO.

Damn the parachute?

[fahrbot-bot]

Or being required to wear a ballistic parachute, because Amarena's Thunderjet design could reach altitudes as high as 10,000 feet.

Or any "reasonable" height for that matter. Jet pack use does not fail gracefully. No glide ratios or gyroscopic descents, just Ahhhhhh... splat. A parachute sounds like a fairly good idea here.

Re:Damn the parachute?

[rwyoder]

Or being required to wear a ballistic parachute, because Amarena's Thunderjet design could reach altitudes as high as 10,000 feet. Or any "reasonable" height for that matter. Jet pack use does not fail gracefully. No glide ratios or gyroscopic descents, just Ahhhhhh... splat. A parachute sounds like a fairly good idea here.

To restate what he is saying:

• What is the powerplant failure mode of a fixed-wing a/c? It becomes a glider.
• What is the powerplant failure mode of a rotary-wing a/c? It becomes an auto-gyro.
• What is the powerplant failure mode of a jet pack? It becomes a large rock.

The flying car concept (based on ducted fans) has the same fatal flaw.

Bah! Wind Resistance Issues

[Phoenix666]

I solve wind resistance issues by coating myself with astroglide.

Re:Bah! Wind Resistance Issues

[Overzeetop]

Who let Richard Gere's gerbil post to slashdot?

Re:soccor moms

[4D6963]

I hope there is an IQ minimum

Nah, IQ tests are too long to pass. Would be much quicker to ask people to spell out "soccer" instead.

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