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HomeAircraftHelicopterHelicopter Main Discussion › Curved blades?
10-23-2009 08:44 PM  8 years agoPost 1
VooDooXrrElite Veteran - San Francisco Bay Area CA, US (San Mateo) - My Posts: All  Forum  Topic

So why dont helis have forward or backward curved blades is there a reason for this or just doesn't work? this picture gave me the idea because i was thinking DAMN MY HELI WOULD LOOK SWEET WITH THOSE BLADES ON IT! also would be an awesome tattoo.. lol

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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10-23-2009 09:03 PM  8 years agoPost 2
SteveH

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Texas

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Eh....it looks like a fish with a hat on.

The government cannot give you anything without first taking it from someone else.

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10-23-2009 09:20 PM  8 years agoPost 3
JJMAN (RIP)

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Chesapeake, Virginia - USA

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I see an old lady knitting a monkey.

JAY HIGGS

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10-23-2009 09:21 PM  8 years agoPost 4
VooDooX

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San Francisco Bay Area CA, US (San Mateo)

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ignore the rest just the blades!

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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HomeAircraftHelicopterHelicopter Main Discussion › Curved blades?
10-23-2009 09:26 PM  8 years ago •• Post 5 ••
ShuRugal

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Killeen, TX

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because it would be harder to make a curved blade rigid, and as the blade deformed in flight, it would radically alter the lift/drag properties.

AMA 700159

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10-23-2009 09:50 PM  8 years agoPost 6
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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I see boobies!

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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10-23-2009 10:23 PM  8 years agoPost 7
Randog

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Santa Clarita,California,U SA

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I like boobies!

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10-23-2009 10:23 PM  8 years agoPost 8
VooDooX

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San Francisco Bay Area CA, US (San Mateo)

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i want forward swept heli blades!!! then you would get more lift as there more blade area in the same length due to to curvature even just a slight forward swept design can somone ding in that has an aeronautical background

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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10-23-2009 10:29 PM  8 years agoPost 9
jackheli

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Vancouver - Canada

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LOL... when the back blade swings forward it hits the canopy...

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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10-23-2009 10:31 PM  8 years agoPost 10
VooDooX

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San Francisco Bay Area CA, US (San Mateo)

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not if you did it SLIGHTLY like 10deg swept forward or designed the canopy to deal with this

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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10-23-2009 10:48 PM  8 years agoPost 11
2LTime

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Walworth,NY

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Think about how a blade pivots about the spindle. With a curved blade this twisting (collective) would result in quite a bit of "flapping". Put your blade on the grip at an angle other than straight out and see what happens when you give an input. Bye-Bye tailboom.

Jeff

If you can't learn to do it well, learn to enjoy doing it badly.

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10-23-2009 11:32 PM  8 years agoPost 12
xcell90

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Michigan

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Lets think a but this if the blade leads but 10 degrees and ignore the impractible shape of the blades, the blades will lead the fly bar and have a faster response. It would be easier to lighten or shorten the fly bar.

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10-23-2009 11:54 PM  8 years agoPost 13
jackheli

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Vancouver - Canada

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What Flybar? it is FBL, of course!

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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10-24-2009 12:05 AM  8 years agoPost 14
QuantumPSI

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Atlanta, GA

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A lot of other dynamic effects would come into play with such a setup. The loading to the servos would be greater (depending on head setup) and at first thought (meaning I haven't sat and really thought this through yet), I see there being a phasing issue. I'm not 100% sure about this yet, but when I think about it a little more, I'll update this post. Swept forward IS an unstable setup though. You would have a more aggressive machine that's for sure.

...now where was I, dh/dt = BS-dx/dt
I will fly you forever... till earth do us part

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10-24-2009 12:25 AM  8 years agoPost 15
jake26

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central cali

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wouldnt that make the cord wise CG of the blade in front of the blade at the root

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10-24-2009 12:54 AM  8 years agoPost 16
OICU812

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Edson, Alberta, Canada

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I see dead people

...Once upon a time there were Nitros, flybars and frequency pins...

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10-24-2009 01:05 AM  8 years agoPost 17
GyroFreak

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Orlando Florida ...28N 81W

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I would think if a curved blade had any advantage we would see some on military or commercial helicopters.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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10-24-2009 05:01 AM  8 years agoPost 18
cudaboy_71

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sacramento, ca, u.s.

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trying to ignore it. but all i see is a fish.

if it ain't broke, break it.

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10-24-2009 01:59 PM  8 years agoPost 19
w.pasman

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Netherlands

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then you would get more lift as there more blade area in the same length due to to curvature even just a slight forward swept design can somone ding in that has an aeronautical background
I'm NOT aeronautical engineer.

But I don't think forward sweep would help. I think the main thing that this would do is make the blades heavier (due to extra material needed to handle the forces.
If you want to get more blade area you can just make straight blades wider.

The only thing I can think of is that forward swept blades might create better air flow at the tip. But other ways (winglets? bent forward only at tip? Wider tip?) might be more efficient ways to achieve that?

Actually I would suggest to make blades WIDER at the tip, as that is the place where I expect most lift be generated. Drop the useless material at the root...

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10-24-2009 02:48 PM  8 years agoPost 20
JRjoe

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Jonesville , IN USA #1

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That might make for a cool tattoo.


JRjoe.....
Indoor plumbing??? No, we don't need that!!!

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HomeAircraftHelicopterHelicopter Main Discussion › Curved blades?
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