Can a helicopter fly upside down?

[2002XLT 5,000+ posts]

i believe there is one copter, the comanche that can. not sure if thats the exact one, but im pretty sure it is.

 

[IgnoreMe 5,000+ posts]

i really need to know how the **** its even possible for the toy one to do this //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[WhoSayWho? 5,000+ posts]

They fly upside down in Australia.

Seriously, they can only do so momentarily as in rolls but they cannot sustain flight that way.

 

[fbi90909 5,000+ posts]

wow, that is exactly what i did not expect to see. how the hell?
i would think flipping the helicopter over would make it fly faster towards the ground. wtf

i'm sure the motor switched direction of the turn when he flipped it pretty quickly. kinda like a car, switching from drive to reverse. being it a toy and having super light weight blades i'm sure that little motor can handle the switch over.

but an actual helicopter takes a min for it to even gain enough speed for lift off. if a helicopter tried to reverse it's blades in mid air they'd probrably just fall to the ground not being able to get the proper velocity required.

does that make sense?

 

[Rich B 5,000+ posts]

Im not answer these kinds of questions anymore after that one week ban for the stupid airplane on a conveyer belt poll.

//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[WhoSayWho? 5,000+ posts]

It is cheaper to train pilots to fly rightside up than it is to engineer a heli to fly upside down.

 

[IgnoreMe 5,000+ posts]

i'm sure the motor switched direction of the turn when he flipped it pretty quickly. kinda like a car, switching from drive to reverse. being it a toy and having super light weight blades i'm sure that little motor can handle the switch over.but an actual helicopter takes a min for it to even gain enough speed for lift off. if a helicopter tried to reverse it's blades in mid air they'd probrably just fall to the ground not being able to get the proper velocity required.

does that make sense?

i think i found it. seems like this guy knows more about those toy helicopters than i do lol. pretty much what you said, but switch the blades, and not the motor.

You just change the pitch of the blades from positive to negative.
when you have positive pitch and the heli is upright it pushes wind towards earth.

when you have negative pitch and the heli is upright it pushes the wind towards space.

So when the heli is upside down with negative pitch you are pushing the wind to the ground lifting the heli up.

so, the pitch of the blade is adjustable from the remote control i would assume. but then again, why would they even have that lol

 

[crunktimes.com 5,000+ posts]

Closest thing I could find

 

[Pr1m3 10+ year member]

I think the only chance of this happening is if the rotors each twisted so the thrust would still be up, because the rotors of a helicopter are like blades of a fan, twisted to thrust air (in both cases, downward). If the blades of a fan were twisted the other way (or if they fan was in reverse) it would switch the direction of thrust. Therefore, a fan and a helicopter would push air up, so if the helicopter was inverted, if would be making downward thrust. However balancing as far as I am concerned would probably be very difficult.

Edit: Wow, beat me to it.

i think i found it. seems like this guy knows more about those toy helicopters than i do lol. pretty much what you said, but switch the blades, and not the motor.


so, the pitch of the blade is adjustable from the remote control i would assume. but then again, why would they even have that lol

 

[2002XLT 5,000+ posts]

but then again, why would they even have that lol

So you can fly upside down, duh. //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[IgnoreMe 5,000+ posts]

seems like as soon as he does that first back flip hes being pulled to the water pretty fast lol.

2002xlt: lol, true.

 

[hoss 5,000+ posts]

OMG i would literally cry if i were in a helicopter doing that... i cant even imagine how scary that must be...

 

[IgnoreMe 5,000+ posts]

OMG i would literally cry if i were in a helicopter doing that... i cant even imagine how scary that must be...

i would assume these people dont value thier lives very much. or are addicted to adrenaline. or maybe crazy. or maybe a combo of all three.

 

[tommyk90 5,000+ posts]

A regular helicopter, no. The blades create lift. If the helicopter was upside down for a sustained period of time it would just get pulled down to the ground.

That redbull helicopter is insane though.

 

[Hintzyboy 5,000+ posts]

i think i found it. seems like this guy knows more about those toy helicopters than i do lol. pretty much what you said, but switch the blades, and not the motor.


so, the pitch of the blade is adjustable from the remote control i would assume. but then again, why would they even have that lol

Sorry, but that's retarded. There is no way a cheap toy helicopter is going to be equipped with a motor that can switch direction that quickly. And it wouldn't work that way anyhow. The reason it can fly upside down is because the "cockpit" only weighs a couple pounds. The blades are angled slightly, but when you flip the heli 180 degrees, it's the same angle. A real helicopter couldn't sustain flight because too much weight would be above the point where lift is generated. But for a two-pound piece of plastic, that's really not a problem.

Now, if the blades are shaped like air-plane wings (Rounded on top, flat on the bottom), then you would have to switch direction in order to continue generating lift