Helicopter on a turntable

[SVT Cobra]

No it wouldn't

And FFS people stop copying M4H with the "space for rent" posts, it is going to turn into another over done ATOT joke that will end up in the text ban filter.

 

[foghorn67]

I sense a parody.

 

[Martin]

Originally posted by: YOyoYOhowsDAjello

Originally posted by: Martin

Originally posted by: Skoorb

Originally posted by: 911paramedic
That's what the tail rotor is for.

Exactly, it will take off. Helicopters do not require ground friction to take to the air--which is exactly why they can rise in height when they're 1mm from the ground and no longer touching it.

No, because that means the tail rotor would have to make the helicopter spin with respect to the turntable.

As people already mentioned, the blades would stay completely stationary and produce no lift.

So wouldn't this depend on the friction between the turntable and helicopter then?

If the tail rotor has enough force to overcome the friction between the helicopter and the turntable, then it's able to turn the blade relative to the air, and then take off?

Yeah. If the turntable is covered in ice, the heli will take off, but if there are brackets constraining its sideways movement, then it won't.

So it all comes down to what kind of surface its on, though I don't think most surfaces will allow it to take off.

 

[Number1]

Originally posted by: Acanthus
No lift, wouldnt take off.

<= Physics Major.[/q]

OK mister if you are so smart, prove your point.

I think the helicopter would tear itself apart before it would have a chance to take off.

 

[Acanthus]

Originally posted by: Number1

Originally posted by: Acanthus
No lift, wouldnt take off.

<= Physics Major.[/q]

OK mister if you are so smart, prove your point.

I think the helicopter would tear itself apart before it would have a chance to take off.

Im saying with simplification and eliminating the other factors like the tail prop somehow getting enough force to slow the spin of the turntable or something, equal spin in the other direction means there is no lift.

The whole principle of the helicopter is lift based on the rotation of the blades. If they blades arent rotating, there is no lift.

And yes, if a helicopter was spinning that fast it would almost certainly fly apart. So in a sense the pieces will be airborne for a short time 😉

 

[YOyoYOhowsDAjello]

Originally posted by: jimbob200521
If the turntable is spinning with opposite force, would it take off?

FORCE, not speed.

The force exerted by the turntable on the helicopter will not spin it up as fast as the blades will spin up in the opposite direction due to having lower inertia.

The blades will spin up faster than thus it should be able to take off.

EDIT:

<== Physics Minor

 

[Number1]

Originally posted by: Acanthus

Originally posted by: Number1

Originally posted by: Acanthus
No lift, wouldnt take off.

<= Physics Major.[/q]

OK mister if you are so smart, prove your point.

I think the helicopter would tear itself apart before it would have a chance to take off.

Im saying with simplification and eliminating the other factors like the tail prop somehow getting enough force to slow the spin of the turntable or something, equal spin in the other direction means there is no lift.

The whole principle of the helicopter is lift based on the rotation of the blades. If they blades arent rotating, there is no lift.

And yes, if a helicopter was spinning that fast it would almost certainly fly apart. So in a sense the pieces will be airborne for a short time 😉

Blade rotating 1 RPM clockwise
Helicopter rotating 1 RPM counter clockwise
Blade are still moving trough the air at 1 RPM, blade are producing lift.
Prove otherwise.

 

[Acanthus]

Originally posted by: YOyoYOhowsDAjello

Originally posted by: jimbob200521
If the turntable is spinning with opposite force, would it take off?

FORCE, not speed.

The force exerted by the turntable on the helicopter will not spin it up as fast as the blades will spin up in the opposite direction due to having lower inertia.

The blades will spin up faster than thus it should be able to take off.

EDIT:

<== Physics Minor

It was a run and dump thread, my belief is that he meant speed and said force 😛

 

[Acanthus]

Originally posted by: Number1

Originally posted by: Acanthus

Originally posted by: Number1

Originally posted by: Acanthus
No lift, wouldnt take off.

<= Physics Major.[/q]

OK mister if you are so smart, prove your point.

I think the helicopter would tear itself apart before it would have a chance to take off.

Im saying with simplification and eliminating the other factors like the tail prop somehow getting enough force to slow the spin of the turntable or something, equal spin in the other direction means there is no lift.

The whole principle of the helicopter is lift based on the rotation of the blades. If they blades arent rotating, there is no lift.

And yes, if a helicopter was spinning that fast it would almost certainly fly apart. So in a sense the pieces will be airborne for a short time 😉

Blade rotating 1 RPM clockwise
Helicopter rotating 1 RPM counter clockwise
Blade are still moving trough the air at 1 RPM, blade are producing lift.
Prove otherwise.

Relative to the air, there would be no motion.

 

[wazzledoozle]

If the tail rotor can produce enough force to overcome the friction between the base and the turntable, giving the top rotors motion relative to the air, yes it would fly. Otherwise, no. I voted yes because I assume the vast majority of helicopters are powerful enough to spin across stationary ground even without lift.

<Highschool Junior

 

[YOyoYOhowsDAjello]

Number1, the blades are attached to the helicopter, so 1RPM of the blades clockwise + 1 RPM counterclockwise of the helicopter in the opposte direction = they stay still

 

[YOyoYOhowsDAjello]

Originally posted by: Acanthus

Originally posted by: YOyoYOhowsDAjello

Originally posted by: jimbob200521
If the turntable is spinning with opposite force, would it take off?

FORCE, not speed.

The force exerted by the turntable on the helicopter will not spin it up as fast as the blades will spin up in the opposite direction due to having lower inertia.

The blades will spin up faster than thus it should be able to take off.

EDIT:

<== Physics Minor

It was a run and dump thread, my belief is that he meant speed and said force 😛

Do you agree that the answer to the question he asked is then "Yep"?

 

[Jeff7]

Originally posted by: SVT Cobra
No it wouldn't

And FFS people stop copying M4H with the "space for rent" posts, it is going to turn into another over done ATOT joke that will end up in the text ban filter.

It will join "Oh Snap" in infamy, soon to be reserved only for mods.


"Oh snap! You've just been banished to prime real estate elsewhere for two weeks."
😀

 

[JRich]

The gyro on my RC heli would be going nuts 🙂

 

[randay]

depends, does the heli get more mpg in neutral or in gear?

 

[Raiden256]

Originally posted by: JMWarren
Maybe

PRIME AD SPACE FOR RENT!

ROFFLES

 

[StageLeft]

Oh i didn't read question enough. I assumed it was a frictionless but unmoving turntable, in which case the tail rotor would obviously allow it to lift. If the turntable is spinning in an opposite direction and in same RPM as the main rotor, obviously it will be motionless relative to the air and not produce lift unless the tail rotor is so darn powerful that it can overcome the static friction of the chopper's botom with the turntable and stabilize it so that it's no longer spinning, in which case the main rotors now would be spinning in a way they need to to product lift.

 

[Canai]

Does the turntable have a slipmat on it?

 

[91TTZ]

It depends on what kind of helicopter it is.

 

[StageLeft]

Originally posted by: 91TTZ
It depends on what kind of helicopter it is.

hee hee

 

[Bootprint]

Is this what might be called a standard helicopter with a tail rotor?

Or a coaxial helicopter?

 

[91TTZ]

Originally posted by: Bootprint
Is this what might be called a standard helicopter with a tail rotor?

Or a coaxial helicopter?

Yeah, most Kamov designs would take off.

 

[YOyoYOhowsDAjello]

Originally posted by: 91TTZ

Originally posted by: Bootprint
Is this what might be called a standard helicopter with a tail rotor?

Or a coaxial helicopter?

Yeah, most Kamov designs would take off.

But you can't set up the problem with a helicopter like that.

Opposite force is meaningless?

 

[Smartazz]

I asked my physics teacher this and he thinks that it would not take off.

 

[YOyoYOhowsDAjello]

Originally posted by: Smartazz
I asked my physics teacher this and he thinks that it would not take off.

Which question did you ask him?

Opposite force (like the OP) or opposite speed?