Can a helicopter fly upside down?

[sdmtnbiker420 10+ year member]

http://www.youtube.com/watch?v=cTqSKKlmXXQ&NR=1

 

[Ken448 10+ year member]

yup.. That is often a bonus after the end of any RC Heli demo or competition. See who can cut the grass.. VERY hard to do!! These guys get stuff handed to them so its no big deal if they bury it though.

 

[jco1385 5,000+ posts]

lift is created when the pitch of the blades is changed so that the leading edge is above the trailing edge. the amount of lift varies upon the pitch applied. when a helo is just sitting on the ground, the blades are flat, therefore keeping it on the ground. i know on a blackhawk helo, each blade is independently controlled with it's own pitch control. one blade could have more pitch than the others, creating roll. for a helo to fly inverted it would take a skilled pilot to roll it 180*, then stop it from going all the way over. the physics exist for it to work, but it depends on the aircrafts capabilities. i was a helo mechanic a couple years ago

 

[IgnoreMe 5,000+ posts]

lift is created when the pitch of the blades is changed so that the leading edge is above the trailing edge. the amount of lift varies upon the pitch applied. when a helo is just sitting on the ground, the blades are flat, therefore keeping it on the ground. i know on a blackhawk helo, each blade is independently controlled with it's own pitch control. one blade could have more pitch than the others, creating roll. for a helo to fly inverted it would take a skilled pilot to roll it 180*, then stop it from going all the way over. the physics exist for it to work, but it depends on the aircrafts capabilities. i was a helo mechanic a couple years ago

i dont exactly understand how just pitching 1 blade would create roll (im assuming you mean to some something like a barrel roll? bare with me i really have no idea what im talking about) because its not like a air craft wing that stays in the same location. helicopters blades spin a circle so i would think that force is going to go from 1 side to another to another and not do much of anything no?

 

[jco1385 5,000+ posts]

i dont exactly understand how just pitching 1 blade would create roll (im assuming you mean to some something like a barrel roll? bare with me i really have no idea what im talking about) because its not like a air craft wing that stays in the same location. helicopters blades spin a circle so i would think that force is going to go from 1 side to another to another and not do much of anything no?

ok, when the blades are spinning, this creates a "disc of lift". when one of the 4 blades has more pitch, it makes that side have more/less lift, causing the "disc" to rise/dip to compensate

and when i say one blade, i dont mean it stays on the one blade. it's at a certain point in the rotation that only 1 blade gets the different pitch. say you want to roll right. you would want the right side of the disc to create less lift than the left. so you would increase the pitch on the left side.

 

[Fear Of Theive 10+ year member]

A good one.

 

[IgnoreMe 5,000+ posts]

ok, when the blades are spinning, this creates a "disc of lift". when one of the 4 blades has more pitch, it makes that side have more/less lift, causing the "disc" to rise/dip to compensate

thats what im not understanding though. since its spinning all the way around really quickly, i would assume it would make the helicopter just wobble front to back side to side really quickly since that force is being applied to all the sides as it spins around. like before it can push enough force to get the helicopter to flip that blade is already on the other side creating the same force in the opposite direction.

 

[IgnoreMe 5,000+ posts]

ok, when the blades are spinning, this creates a "disc of lift". when one of the 4 blades has more pitch, it makes that side have more/less lift, causing the "disc" to rise/dip to compensate
and when i say one blade, i dont mean it stays on the one blade. it's at a certain point in the rotation that only 1 blade gets the different pitch. say you want to roll right. you would want the right side of the disc to create less lift than the left. so you would increase the pitch on the left side.

well that answers everything LOL

 

[WulfComp 10+ year member]

its not that the blades are really flipped with the remote, you have two different flying modes. normal and idle up. In idle up the rotor heads spin up to speed, and vertical flight is controlled by the pitch of the blades, which can go pos, and neg. In normal, the blades are more fixed and you control flight by increasing the rotor head speed. Hope that helps clarify some things. Also if you look up T-rex in youtube, or raptor helecopters, you will see some cool shit.

 

[Fast1one 10+ year member]

Repost from the first page newb //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[yne721 10+ year member]

edit n/m

 

[Bimmerdriver 10+ year member]

no

 

[ngsm13 5,000+ posts]

Tits.

nG

 

[Rmsanger 10+ year member]

http://www.youtube.com/watch?v=T9rT1BXEReA

 

[04_edge 10+ year member]

http://www.youtube.com/watch?v=T9rT1BXEReA

hahaha holy shit...when the firework things shot out i though it blew up....