Helicopter ability question for those in the know..

[Yossarian]

other way around actually. you get half a

 

[MrDudeMan]

Originally posted by: novasatori

Originally posted by: Yossarian

Originally posted by: novasatori
FYI Aircraft Propeller is a wing.

A helicopter engine is nothing more than a complex aircrafts engine turned vertical as I said.

engineering quiz time, why does the shape of the prop change along its length?

because the inside rotates faster than the outside?

almost! you got it backward

 

[moks78]

Originally posted by: Evadman
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Yup, British Lynx helicopter can do loops. They travel at around 400mph which is pretty fast by heli standard. Specs. Your last pic looks like an A129 Mangusta attack heli...linky.

 

[novasatori]

forgive me, it was a quick answer with no thought to the mathematical properties.

if I had thought it out I would have remembered the trig theories

 

[halik]

Originally posted by: novasatori

Originally posted by: Hellspawn

Originally posted by: LordMorpheus
It is possible for a helicopter to loop, roll, even hoven inverted.

However, these maneuvers are usually limitied to R/C copters because of the inherent danger, and the whole passenger comfort thing.

Also, a helicopter has no need to be capable of inverted flight, so most "real" copters probably aren't.

There is a great video of an R/C copter going absolutely nuts floating around the internet, but I don't really want to dig a link out. Maybe someone else well before I decide to get around to it.

Ok, thats cool, this person did'nt specify what type of helicopter but thought I would come to a place where some *would* know for fact That's neat!


question: When I think of inverted, I would think of the blades 'pulling' the craft in whatever direction, how could it achieve inverted hover when the 'pull' of the blades would be towards the earth?

The blades have tilt control.. they can stop them from pulling at all when inverted.

Also to the just falling question, I guess ti could happen but saying as none of the air beneath the blades is stable is it, how could it become <more> unstable? Also the lift comes from air above the blades being pulled through them, so I'd have to say no they can't just fall.

Edit: Unless you're talking about a weather phenomena ie wind shear.

i wouldn't think that normal helos have collective set to pitch all the way up to provide enough lift to support it inverted.

 

[jagec]

Originally posted by: dderidex
There is a reason helicopters are referred to as 'rotary wing aircraft'. Same principle that applies to planes applies to helicopters, only instead of the aircraft moving *forward* to generate lift over the wing, the "wing" itself is moving in circles.

It can pivot at the axel, which is how helicopters move at all. The 'blades' are rotated as they swing forward to generate less lift. Less lift over the 'front' of the craft and more over the 'back' of the craft means the aircraft tilts forward and slides that way.

By continuing the tilt on the blades, they can provide lift in the opposite direction entirely.
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I can only assume this is what you meant?

 

[novasatori]

Originally posted by: halik

i wouldn't think that normal helos have collective set to pitch all the way up to provide enough lift to support it inverted.

I just meant stop from being pulled down, not support it inverted.
I'd agree I doubt that any could sustain inverted flight.

 

[gabemcg]

Originally posted by: Daaavo
POW!

WOW! that was incredibly sweet. I have a sudden urge to spend alot of $ on a R/C hellicopter