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HomeAircraftHelicopterAerial Photography and Video › Blade morphing...(the future)
06-06-2009 06:53 PM  9 years agoPost 1
bjelivuk

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Croatia

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06-07-2009 12:54 AM  9 years agoPost 2
Hogster

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Surrey, UK

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Interesting technology ... not sure I would be happy about having a spring holding half of my rotor blades on though!

Great concept though

David

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06-07-2009 02:20 AM  9 years agoPost 3
Wayne Mann

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United States of America

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Sorry, but I thought it was pretty lame. The part of the rotor blade that is extending is just a hollow sleeve with a telescoping tube and a spring. The hollow part would be the tip of the rotor blade where the most lift is created. There is no way it could support the weight of the helicopter. He mentioned the problems helicopters have getting into tight places. Well if you shorten up the rotor disk the helicopter isn't going to be able to create enough lift to stay in the air. I can't see this going anywhere. We have a news station here in the US that has a short segment every night where they test a product and determine if it is a (deal or a dud). This is definately a DUD.

My thoughts

Wayne Mann

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06-07-2009 03:37 AM  9 years agoPost 4
nooobs

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06-07-2009 09:20 AM  9 years agoPost 5
bjelivuk

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Croatia

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Good to hear some opinions. I don't think it was presented with enough detail ,though. He only spoke of the centrifugal force. Nothing about blade pitch and rotor torque(which would obviously affect tail authority). Bare in mind that full size helis have a lot more parameters to work with while flying(pitch & headspeed). Also, it is just a theory afterall. Then again, so was the idea of a "flying screw" by Leonardo da Vinci.

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06-07-2009 09:40 AM  9 years agoPost 6
rroback

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Irvine (UCI), Ca

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The way this would work in practice would be to take off a restricted area with lower blade speed ( so as not to extend blade) but higher pitch, and once in free airspace, increase rpm, decrease pitch to the optimum point. I'm sure this is the future, but clearly not at this time, and not using springs. Everything is aerospace ( in the actual aero part) is moving toward more shape-shifting wings. Being able to adjust every parameter of your airfoil will allow aircraft to be very efficient in different flight conditions.

Rhett..... I can't fly, but the Profi sure can.

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06-07-2009 10:07 AM  9 years agoPost 7
30636086

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Tacoma, WA

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I think its a great idea for a ceiling fan! not so good for helicopter! LOL

I dont suffer from mental iIlness, I actually enjoy mine!

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06-07-2009 12:39 PM  9 years agoPost 8
Tonic

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Des Moines

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To me the whole concept is backwords. Not that I know much but wouldn't you want longer blades for more lift landing and takeing off and shorter blades for faster forward flight?

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06-07-2009 01:56 PM  9 years agoPost 9
eyeinsky

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Fall River, Nova Scotia, Canada

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Balance

Can you imagine the difficulty in having equal linear extension of both blades if they have no synchronization mechanics? Just picture the affect on dynamic balance. That rotor head appears to be rigid; how's that going to work? No lead and lag. No flap or seesaw movement.

Long way from reality, I wouldn't be smiling yet

Hard job competing with gravity.

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06-07-2009 08:35 PM  9 years agoPost 10
catfight

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USA

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I would vote for contra-rotating rotor blades instead of this design -contras have less rotor diameter (significant amount too) and eliminate tail rotor gear(think Align cx heli)and simplify control systems greatly. Just the fact that an autorotation is possible in an emergency is a nice feature also :0)

What goes up must come around

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06-08-2009 12:01 AM  9 years agoPost 11
500Driver

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Burlington, IA

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+1 for dud.

Physics won't allow this to work on several levels.

Aspect ratio...

Solidity ratio...

Are two things that come to mind right away.

Then there is disymmetry of lift that causes the blades to 'flap'...in a two bladed system you compensate for this with 'teetering'...flapping causes the overall center of gravity of the 'disc' to change...but they figured out how to compensate for that with 'underslung' rotorheads (as a 2-bladed example). But I foresee a nightmarish changing 'disc COG' if you are changing the physical length of the blades and flapping (from DOL...DOL can happen even if there is natural wind blowing over the disc...heli doesn't actually have to be moving). On a perfectly calm day in a hover...ok...maybe this wouldn't be a problem...buut that's not gonna happen.

This would absolutely not work in a multi-bladed system because the blades actually lead and lag...accelerate and decelerate in plane.

Anyway...don't hold your breath. This guy needs to take some basic heli aerodynamics lessons and he'll give up on the idea pretty quick.

I wonder if he is actually getting paid for this 'research'?

When in doubt...auto out

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06-08-2009 12:10 AM  9 years agoPost 12
rroback

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Irvine (UCI), Ca

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I'm guessing most of you don't work in, or near an engineering research lab ( either private, or university). If you did, you'd see stuff like this all the time, and stuff that might even be crazier

-Rhett
(who studied aerospace engineering, before a major switch.)

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06-08-2009 03:35 AM  9 years agoPost 13
borneobear

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Kuala Lumpur, Malaysia.

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Don't forget to morph the tail blades too, or you'll be in for a spin.

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06-08-2009 03:57 AM  9 years agoPost 14
trackhead

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utah

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He came up with the idea right before he wiped his ass.............

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06-08-2009 05:12 AM  9 years agoPost 15
Aaron29

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USA

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Watch the whole video. He got the idea after "dropping the kids off at the pool."

Apparently the toilet paper roll holder was the inspiration for this new morphing airfoil.

Wow! I think he should have kept that to himself!

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06-08-2009 05:25 AM  9 years agoPost 16
nooobs

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06-08-2009 05:29 AM  9 years agoPost 17
trackhead

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utah

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I do most of my brainstorming driving a car, or riding my bike. But whatever works I guess.

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06-08-2009 05:31 AM  9 years agoPost 18
nooobs

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06-08-2009 05:43 AM  9 years agoPost 19
Aaron29

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USA

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You're right nooobs. We have the totally wrong attitude about this. This demands our respect and we should rightly give it.

LMAO!

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06-08-2009 06:17 AM  9 years agoPost 20
iflybyu77

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Fort Wayne, IN

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500driver.. good points. However, if it was actively controlled via a computer, not just using the natural tendencies to extend with centripetal forces, it might be feasible. The complexity goes up of course, but controlling it all via a computer could make it work... maybe.

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