Can a helicopter fly upside down?

[Trey803 5,000+ posts]

yes there is a heli that can go upside

 

[IamDeMan 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

The blades change their angle to create lift in the other direction.

 

[Trey803 5,000+ posts]

there was it was on dicovery channel. But it only did barrel rolls, it didnt stay upside down.

thats what I was thinking of

 

[IgnoreMe 5,000+ posts]

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

yes, same angle. nothing changes, therefore thrust is now being applied up instead of down. i dont think it has anything to do with the weight as far as the toy copter is concerned. when you turn a fan over, does the direction of the "thrust" not follow it?

 

[kballa422 10+ year member]

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

LOL I was thinking the same thing. I was gonna go with a for sure no, but after seeing that I'm not so sure. That was crazy!

 

[IgnoreMe 5,000+ posts]

The blades change their angle to create lift in the other direction.

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

you're late. now you owe me 2 shrimp.

 

[mokedaddy 5,000+ posts]

Yes its possible. Not for extended periods of time but that was never brought up. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

This is mainly about barrel rolls but a good read nonetheless.

http://techreport.com/forums/viewtopic.php?t=31029

 

[Ken448 10+ year member]

ooooooooooookkkkkkkkk

Heli's CAN fly upside down, and no they dont have to change the direction of the blades. Only the pitch. No matter the weight bla bla bla. If it can ghave both positive (normal flite) and negative (inverted flite) pitch on the main rotor blades then you CAN have inverted flight in a heli. I pilot model heli's as yet another hobby. If you want to see some REAL RC heli flying go to youtube and search for SZABO 2 brothes that make a living flying and competing with RC heli's



Lolok for Alan and Danny Szabo youll be amazed

 

[IgnoreMe 5,000+ posts]

ooooooooooookkkkkkkkk
Heli's CAN fly upside down, and no they dont have to change the direction of the blades. Only the pitch. No matter the weight bla bla bla. If it can ghave both positive (normal flite) and negative (inverted flite) pitch on the main rotor blades then you CAN have inverted flight in a heli. I pilot model heli's as yet another hobby. If you want to see some REAL RC heli flying go to youtube and search for SZABO 2 brothes that make a living flying and competing with RC heli's

ummm what the ****?! that would take some serious practice i would assume...

 

[Ken448 10+ year member]

yes, just a little. Ive flown for about 2 years, and I am comfortable going inverted and doing loops and rolls. Extreme flite like that takes nothing but practice and MONEY because you will crash a lot. The heli in that vid is worth about $2000 and is powered by a $300-500 battery. Blades (that are guaranteed to break every crash) are $150... Adds up FAST

 

[ArrizX 10+ year member]

Nevamind

 

[IgnoreMe 5,000+ posts]

yes, just a little. Ive flown for about 2 years, and I am comfortable going inverted and doing loops and rolls. Extreme flite like that takes nothing but practice and MONEY because you will crash a lot. The heli in that vid is worth about $2000 and is powered by a $300-500 battery. Blades (that are guaranteed to break every crash) are $150... Adds up FAST

yea i was watching myth busters a couple days ago when they were having a helicopter myth. they bought one that was $2000. i almost shit myself.

 

[twisztdauthorit 10+ year member]

technically if the props were reversed it would have enough force, only problem is would be the balance would be off really bad.

 

[IgnoreMe 5,000+ posts]

technically if the props were reversed it would have enough force, only problem is would be the balance would be off really bad.

probably why the pitch of the blades is the choice of getting upside down flight instead of reversing the engine/blades that already have some serious momentum //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif