With no airflow over the wings of an airplane

[Crusty]

They have guidance. If they're capable of flying horizontally, I assume there's enough thrust that those tiny movable fins work as flaps and provide lift.

If there's enough thrust you don't need lift from wings..... they are used to steer the missile.

 

[novasatori]

They have guidance. If they're capable of flying horizontally, I assume there's enough thrust that those tiny movable fins work as flaps and provide lift.

http://en.wikipedia.org/wiki/Thrust_vectoring

 

[AeroEngy]

They have guidance. If they're capable of flying horizontally, I assume there's enough thrust that those tiny movable fins work as flaps and provide lift.

Their flight path can be horizontal ... however their angle of attack is not. So a component of the thrust provides lift along with the lift generated from the missile body and any control surfaces.

 

[GuitarDaddy]

no, only needs to move forward relative to the air mass. there are RC planes that can fly backward relative to the ground if they're headed into a stiff breeze.

Theoretically you are correct, but I will stand by my statement because the likelyhood of the circumstances necessary to take off in even a prop plane with no forward motion relative to the ground are so tiny they approach absolute zero. The day you decide to prove me wrong and take off into a 150mph head wind please let me know because I want to come watch.

 

[ElFenix]

Theoretically you are correct, but I will stand by my statement because the likelyhood of the circumstances necessary to take off in even a prop plane with no forward motion relative to the ground are so tiny they approach absolute zero. The day you decide to prove me wrong and take off into a 150mph head wind please let me know because I want to come watch.

a boeing 737 could get off the ground with a 150 mph headwind. it'd be really neat to see one hover in a hurricane.

i bet there are ultralights with stall speeds in the teens. maybe even in the single digits. yes, taking off at stall speed is a bad idea, but you don't need much more than that.

 

[coxmaster]

a boeing 737 could get off the ground with a 150 mph headwind. it'd be really neat to see one hover in a hurricane.

i bet there are ultralights with stall speeds in the teens. maybe even in the single digits. yes, taking off at stall speed is a bad idea, but you don't need much more than that.

I've flown backwards before.. Plus I've heard dozens of stories of people taking off in a J-3 Cub with a serious headwind, flying backwards, and landing on the same runway.. Not sure that one is true, but its definitely possible

 

[BoomerD]

wtf if that's 2009, then why don't I have a jetpack now?

http://www.youtube.com/watch?v=eW3kijZDwp8&feature=related

 

[DrPizza]

http://xkcd.com/803/

One of my favorites in response to overzealous simplified explanations of flight.

 

[zinfamous]

Depends on whether or not you have a treadmill.

this is the answer, obviously.

why isn't the obvious RBM OP banned?

:hmm:

no evidence..yet?

 

[zinfamous]

You need air flowing over the wings to generate lift. This is why the plane wouldn't take off from a treadmill (unless it were moving forward relative to the ground while on the treadmill).

dear god please tell me that you are trolling for trolls.

 

[coxmaster]

Theoretically you are correct, but I will stand by my statement because the likelyhood of the circumstances necessary to take off in even a prop plane with no forward motion relative to the ground are so tiny they approach absolute zero. The day you decide to prove me wrong and take off into a 150mph head wind please let me know because I want to come watch.

As ElFenix said, it really isn't that difficult to imagine a possible scenario. There are plenty of LSAs that could probably rotate briefly at 30kts or less and then there are plenty of experimentals which rotate at even lower speeds.

 

[ElFenix]

http://xkcd.com/803/

One of my favorites in response to overzealous simplified explanations of flight.

i actually asked that question about symmetrical airfoils (common in RC and in particular the 'big stick' sort of plane that will readily land backwards) in 9th grade science.

the soccer coach who taught the class had no idea.

the answer is angle of attack.

 

[Gibsons]

Hystrike/Fasthawk A wingless, finless missile.

 

[edro]

Everything you need to know about airfoils should have been learned by age 10, from sticking your hand out a moving car's window.

 

[Kadarin]

You know, if you pray to Jesus hard enough, maybe God will just levitate the plane through Divine will.

 

[randay]

Hystrike/Fasthawk A wingless, finless missile.

FAKE. with no wings there is no lift. theres no way such a missile would ever leave the ground!


.... unless this is charlie sheens violent wingless missile of truth?

 

[Gibsons]

FAKE. with no wings there is no lift. theres no way such a missile would ever leave the ground!


.... unless this is charlie sheens violent wingless missile of truth?

I think the warhead is 40% Winning, 50% Swagger, and 35% Awesome. Which adds up to about 0.9 Sheens.

 

[skyking]

all that bernoulli's principle and airflow over the wing, all that is pure bunk.
Everybody knows it takes a wallet to generate lift. Take the wallet out and it will fall out of the sky like a toolbox with a broken handle.

 

[Crusty]

FAKE. with no wings there is no lift. theres no way such a missile would ever leave the ground!


.... unless this is charlie sheens violent wingless missile of truth?

How the fuck does a bottle rocket work then? :thumbsdown::thumbsdown::thumbsdown::thumbsdown:

 

[Crono]

You don't need wings if you have sufficient velocity. Air moving over the body of the craft or object is enough.

Wings do add significant lift, though, and enable maneuverability with flaps/aerilons. Fins stabilize flight on rockets/missiles.

 

[The Boston Dangler]

here we go - morons and flight, part 2

 

[coxmaster]

all that bernoulli's principle and airflow over the wing, all that is pure bunk.
Everybody knows it takes a wallet to generate lift. Take the wallet out and it will fall out of the sky like a toolbox with a broken handle.

Money is in fact the one and only secret to lift. I learned that when I first started my training

 

[sao123]

the space shuttle has wings. air flows over them.
it fall like a brick.

explanation OP?

 

[Ichinisan]

How the fuck does a bottle rocket work then? :thumbsdown::thumbsdown::thumbsdown::thumbsdown:

You might be trolling, but I'll bite...

They're not even the same form. The part hanging down weighs more than the rocket on the tip. That's the only thing that keeps it oriented upward. The exhaust is closer to the tip.

If the fuel lasted long enough, and you shot one horizontally off a cliff, it would turn upward. If you want a rocket to fly horizontally, don't build one like a bottle rocket.

 

[fatpat268]

a boeing 737 could get off the ground with a 150 mph headwind. it'd be really neat to see one hover in a hurricane.

Lol, I love doing that in the flight simulator. In FSX, I'll put in a 170 knot headwind, and I'll hover that sucker. :biggrin: