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HelicopterBeginners Corner › How does inverted flying work?
11-29-2005 01:44 AM  12 years agoPost 1
Noobie Kid

rrNovice

Rancho Cucamonga, CA

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I watched some movies where they fly inverted but i just dont get how it works. Seems like the blades would have to spin the opposite direction in a second. Anyone know?

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11-29-2005 01:54 AM  12 years agoPost 2
Bllade

rrApprentice

Chester, NY

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there are two types of inverted flying, switched and unswitched.
In switched you program a switch in your radio to reverse the rotation of the blades so that while inverted you still maintain lift.
In unswitched youset your radio up so that when your throttle/collective stick is at center you your blades are idling, when you raisethe stick the blades turn one way to provide normal lift, when you lower the stick the other direction it reverses the rotation of the blades to provide lift while inverted....

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11-29-2005 02:00 AM  12 years agoPost 3
Bllade

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Chester, NY

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sorry.... I just couldnt resist that

Now for the REAL Story...

Main blades on a heli provide lift by altering the angle of the blade. This is called blade PITCH. During normal flight the blade pitch can be set to a + value normally between 0 - 10 degrees with 5-51/2 degrees being the hover point. The more pitch you have the more lift you generate.

FOr inverted flight the blades are alsocapable of going to - pitch, usually from 0 - -10 degrees depending on whattype of flying your doing. While inverted the -pitch still provides lift keeping the helicopter in flight.

This is a simplistic explanation because many other things come into play as well some being blade design, throttle curves, and pitch curves.

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11-29-2005 01:33 PM  12 years agoPost 4
BarracudaHockey

rrMaster

Jacksonville FL

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I was like...........uh what is he smoking?

Andy
AMA 77227
http://www.jaxrc.com

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11-29-2005 01:40 PM  12 years agoPost 5
bagobitz

rrVeteran

saddleworth,lancs,UK

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How does inverted flying work?
Bllade, the answer, surely, is "extremely well"

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11-29-2005 04:54 PM  12 years agoPost 6
cupra

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leicester uk

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for me it dose not work even on the sim but i like the first answer even if it was a bit cruel

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11-29-2005 05:47 PM  12 years agoPost 7
Jeff Greunke

rrApprentice

Northwest Ohio

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He,He Bllade, are you trying to confuse the poor guy I thought I was reading it wrong at first

Raptor 30, Raptor 50, Raptor 50#2, E620

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11-29-2005 05:51 PM  12 years agoPost 8
tchavei

rrProfessor

Portugal

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Damm... I almost chocked on my coffee when I saw Blade's first answer.


As I can remember, half year ago I didn't know either. I knew the blades couldn't just reverse direction but I just had never thought about it.

Oh well... live and learn

Cheers
Tony


--------------------
"Perfection and patience usually walk side by side..."

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11-29-2005 06:46 PM  12 years agoPost 9
A. Bundy

rrElite Veteran

Aurora,IL. 30W/SW of Chicago

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I was all WTF is this guy talking about.

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11-29-2005 09:24 PM  12 years agoPost 10
Noobie Kid

rrNovice

Rancho Cucamonga, CA

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So the angle of the blade changes to make the lift go the opposite way?

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11-29-2005 09:25 PM  12 years agoPost 11
spritefiend

rrKey Veteran

Camarillo, CA

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So the angle of the blade changes to make the lift go the opposite way?
yep

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11-30-2005 08:53 AM  12 years agoPost 12
cupra

rrApprentice

leicester uk

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is this like when the water goes down the plug hole which way will it spin ?

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11-30-2005 09:15 AM  12 years agoPost 13
tchavei

rrProfessor

Portugal

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cupra: that depends on which side of the hemisphere you are


Tony


--------------------
"Perfection and patience usually walk side by side..."

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11-30-2005 10:10 AM  12 years agoPost 14
cupra

rrApprentice

leicester uk

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Tony
will this change the way the blades turn inverted then ?lol

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11-30-2005 10:32 AM  12 years agoPost 15
tchavei

rrProfessor

Portugal

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cupra: Interesting thought... maybe autorotations are smoother on one hemisphere than on the other... maybe the usual hovering tilt we experience is agravated or atenuated acording to the hemisphere where we fly...

I think I'm going to write a paper on this stuff. Probably just as useless as the other ones I wrote

HAHAHA

Cheers
Tony


--------------------
"Perfection and patience usually walk side by side..."

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12-01-2005 12:42 AM  12 years agoPost 16
D.Magee

rrKey Veteran

kansas city mo.

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In the other hemisphere it is easy to fly upsidedown.
The trick there is flying right side up

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12-01-2005 01:56 AM  12 years agoPost 17
Bill Collins

rrApprentice

Middletown, CT. U.S.A.

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A simpler way to explain it would be look at how your tail rotor works. Same thing, only sideways. Like the man says, KIS don't MIC! Took me a while but I got it!





No witty signature at this time. Please check back later......

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12-01-2005 05:15 AM  12 years agoPost 18
ManuelCJr1

rrApprentice

Sun City, Arizona

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Inverted is acheived when the blades have a negative pitch. Have you set the pitch on your heli yet? They usually have about 20 degrees total, ten up and ten down (pos., neg) But it will only work if you have an idle up set. In idle up you have to have a V- throttle curve. Instead of the normal linear throttle curve. That is because you now need to have throttle while the blades are spinning at negative pitch.

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