/sci/ - Science & Math

[Anonymous No.2676296]

Why don't we have jetpacks yet?
Seriously we have super fast computers and we sent a man to the moon and yet we still can't tackle something as simple as portable flight

[Anonymous No.2676301]

>sent a man to the moon
How does the flag stay up without wind?

[Anonymous No.2676300]

STFU, We're busy making quadrillions with oil we can't give you jetpacks

[Anonymous No.2676307]

>>2676301
How are those two statements related?

[Anonymous No.2676306]

>>2676301
Forgot the pic.

[Anonymous No.2676310]

Because oil companies have sabotaged the development of safe, small nuclear power cells.

[Anonymous No.2676314]

>>2676301
wires bro

[Anonymous No.2676316]

>>2676301

What the fuck you are talking about.

[Anonymous No.2676317]

>>2676301
Because there is no gravity
derp

[Anonymous No.2676320]

There is a man that dives from airplanes with a jetpack.

[Mr. Sloth No.2676326]

>>2676317

4/10

[Anonymous No.2676327]

magnets

>>2676301

[Anonymous No.2676330]

>>2676326
I'm not trolling
Why would the flag fall if there is no gravity?
Its common freaking sense

[Jon !!7WXrmZAqF1n No.2676331]

>Because there is no gravity

are you retarded? The moon has gravity, just less of it.

[Anonymous No.2676334]

http://www.martinjetpack.com
I saw this thing in action at EAA Oshkosh 2008.

[Anonymous No.2676337]

>How does the flag stay up without wind?

Inertia.

[Anonymous No.2676341]

>we have super fast computers
>sent a man to the moon
Which was a complete waste of money.

>something as simple as portable flight
>implying "portable flight" is easy


The technological revolutions that happened during the last century were fundamental, but completely unpredictable.

Just look at the ridiculous predictions people made in the 50s about how computers would develop, etc.
A.I. development was predicted to yield human intelligence simulated on a computer very early on, which was completely retarded.
And even knowadays, CPU speed improvements are somewhat stopped by material issues, which is why you're seeing the switch to multiple cores. At the same time memory gets cheaper, but really fast memory (which is needed for really fast CPUs) is exponentially more expensive and again there's material limits, so even today it's really hard to tell how things are going to develop.
tl,dr: you're a fucking idiot.

It's a sheer impossibility to assess how hard a problem is until you've solved it, basically.
Look at Fermat's theorem. Sure looks simple, doesn't it?

Still you fucking idiot can't prove it. Why is that, you fucking idiot? Why can't you prove such a simple problem?

Fucking idiot.

Oh well, but back to topic. As far as I know there are jetpacks, but they're expensive and probably a safety hazard if not used with care. (Also they won't be getting any less expensive since there's no need for it, so no money will be sunk into researching jetpack-technologies.)

[Anonymous No.2676342]

>>2676330
If there's no gravity THEN HOW THE HELL IS HE STANDING ON THE GROUND?

[Anonymous No.2676345]

>>2676330
Again, how is this statement related to any other statement in this thread?

[Anonymous No.2676356]

>>2676341
>Look at Fermat's theorem. Sure looks simple, doesn't it?
Your example sucks

[Anonymous No.2676365]

Its cause that would fall in the domain of engineering and engineers can't do shit
Look at how long it has taken them to switch car technology to alternative fuels

[Anonymous No.2676369]

>>2676296
Everyone's busy derping all over the place. The fuel use for jetpacks goes mostly to holding you up, and not into making you go sideways which is the point of travel (moderately tautological).

If someone bothered to put a system together that punched you really high really fast and then deployed glider wings to go sideways, it might be economically feasible (but I doubt it).

Cars and planes are still the best solutions for fuel/distance traveled.

[Anonymous No.2676375]

>>2676365
see
>>2676369

engineers already know that it's a dumb idea. nobody else seems to have cottoned on yet, though.

[Anonymous No.2676383]

>>2676356
nope, it's you that sucks.

Something can look deceptively simple yet be unimaginably hard. You can't really tell until you've done it.

The only reason my example might not be applicable is because BUILDING JETPACKS DOESN'T SEEM SIMPLE IN THE FIRST PLACE.

Other than that I'm totally right. FLT looks like it should have an easy proof, but it doesn't (at least we know none and there probably really isn't one).

[Anonymous No.2676387]

>>2676369
cars suck
I'm tired of spending money on gas that will go towards terrorist and greedy assholes so I can go wait in traffic

[Anonymous No.2676388]

>>2676296
they already exist

extremely regulated
if it weren't regulated i'm sure people would be buying them more frequently

[Anonymous No.2676392]

>>2676387
Your magical jetpack will run on which fuel source, now?

[Anonymous No.2676395]

>>2676383
>BUILDING JETPACKS DOESN'T SEEM SIMPLE IN THE FIRST PLACE.
Yes it does
Just build a goddamn life size rocket,tie it to your waist and work out the details to make it safe and controllable

[Anonymous No.2676400]

>>2676392
duh, rainbows and cupcakes

[Anonymous No.2676401]

>>2676392
Hydrogen
You know that magical element that's derived from water

[Anonymous No.2676404]

>>2676395
>life size rocket
>safe and controllable
>details

Gentlemans, I smell a troll.

[Anonymous No.2676408]

>>2676401
That's an oxidizer, silly. Let me ask again: what fuel source do you plan to use?

[Anonymous No.2676414]

>>2676408
No its not
If you burn hydrogen it creates propultion
What do you think NASA's rockets are powered with?

[Anonymous No.2676415]

Look at where the flames/exhaust goes on a jetpack, and where your legs are relevant to that...

[Anonymous No.2676416]

Methane is less dense than air. So just hold in your farts from now on.

Enjoy your cheap antigravity.

[Anonymous No.2676417]

>>2676408
>hydrogen
>oxidizer

ALL CHEMISTRY EVER IS WRONG

[Anonymous No.2676420]

roadable aircraft are just around the corner, for real this time. they've been suppressed by the big automotive company trust, just out of laziness (they really do very in changing car designs from year to year, and the most successful lines have gone practically unchanged for decades).

but they're going to have no choice but to finally turn to roadables to keep people on petrofuels, to increase consumption, once electric and biodiesel/vegoil cars start to become the standard (aircraft need extremely high energy density fuel, super-premium petrol pretty much exclusively, not that biodiesel/vegoil won;t be toyed with).

something like pic related but with a rotor as well, as a compound type aircraft (those little wings would have a hard time getting the vehicle off the ground, but would work fine once it was up to speed).

[Anonymous No.2676422]

>>2676414
With what are you reacting the oxygen? Perhaps a fuel? lrn2thermo

[Anonymous No.2676423]

>>2676404
I smell penis.

Than again I haven't showered in 4 days.

[Anonymous No.2676426]

>>2676417
oh man i got everything backwards closing /sci focus on work

[Anonymous No.2676438]

>>2676296

>as simple as portable flight

10/10 raged hard

[Anonymous No.2676442]

>>2676420
>mfw conspiracy theorists were right all along and scientists have been selling out to the highest bidder

[Anonymous No.2676450]

>>2676301
They supported it with some carboard

[Anonymous No.2676463]

>>2676296
The average person can't drive a groundcar without fucking up and you want to give them the ability to FLY? FFFFFFFFFFFFFFFFFFUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU

[Anonymous No.2676472]

>>2676463
Yes
Atleast if they die in a jetpack accident they won't kill inocent pedestrians or crash agaisnt other cars
Just remember kids, don't drink and fly

[Anonymous No.2676481]

>>2676472
My little sister was killed in a tragic jet pack accident. She was playing on the monkeybars when a drunk and irresponsible jetpacker fell from the sky and crushed her. All of this could have been avoided if just stayed on the ground like God designed us.

Just say no to jetpacks.

[Anonymous No.2676490]

>>2676463
Think of it as evolution in action.

Flying cars --> all people smart enough to to fly but stupid enough not to be cautious end up dead --> only retards and intelligent people survive --> retarded eloi work in the mines while glorious master morloks fly in the air and have flying castles, spacecrafts and space elevators!