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HelicopterMain Discussion › Single bladed helicopter
12-12-2004 07:31 PM  13 years agoPost 1
ecoliburger

rrApprentice

NORCAL

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Anyone on the list seen fly or flown a single bladed helicopter? Looking for some actual personal experiences, I already know why it wont work very well. So please no posts about how its a dumb idea.
Why you ask?? .........Machine shop+some old helis+tired of the same old thing = me.

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12-12-2004 07:52 PM  13 years agoPost 2
TMoore

rrMaster

Cookeville, TN

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Who says it won't work? Gunter Knipprath used to make a single bladed head that Wolfgang Simon flew. I flew one a long time ago, back in the 80's. You may not believe this, but a lot of the ideas that folks are coming up with right now, well, we already thought of them back in the dark ages called the 80's.

Just take one blade off and counter weight the other side and go fly. It's great for those single blades that you have left over from your last crash.

TM

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12-12-2004 08:58 PM  13 years agoPost 3
vinrx7

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Americas finest city

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No SH&T?
I would love to see a video of that. Anyone have one they can share???

STUPID TREE!!!

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12-12-2004 09:25 PM  13 years agoPost 4
ecoliburger

rrApprentice

NORCAL

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So did it fly ok? Flybar or flybar less? if you remember.
Thanks for the reply.

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12-12-2004 11:56 PM  13 years agoPost 5
TMoore

rrMaster

Cookeville, TN

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Flybarless.

The heli couldn't care less if it has one blade or two as long as it's balanced. It made no difference in how it flew.

TM

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12-13-2004 12:31 AM  13 years agoPost 6
AirWolfRC

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42½ N, 83½ W

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Take a look at my site http://www.AirWolfRC.com

Wolfgang

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12-13-2004 01:05 AM  13 years agoPost 7
zoom boy

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N.E. Lincolnshire UK

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Thats just weird

One thing that im wondering about is that because there is only lift being generated on one side of the disk at any one time, then that would have the same effect as being ever so slightly out of balance, just like how having the blades out of track means one blade is making more lift than the other, so causing the lift centre to not be right in the centre of the disk but off to the side that the high blade is on, which causes a slight vibration

also what does it auto like?

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12-13-2004 01:12 AM  13 years agoPost 8
TMoore

rrMaster

Cookeville, TN

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One blade or two, it doesn't matter. It flies just like any other heli.

TM

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12-13-2004 02:06 AM  13 years agoPost 9
JitsuGuy

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Tulsa, Oklahoma

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Technically, single blade setups are more efficient than two blade setups.

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12-13-2004 02:16 AM  13 years agoPost 10
dtang

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Massachusetts

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any word on vibrations?

intuitively i would think that different moments would cause it to shake like crazy.

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12-13-2004 02:35 AM  13 years agoPost 11
KC

rrElite Veteran

WA

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anyone here really do aeros and autos with it or just fly around with it????

cool

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12-13-2004 05:53 PM  13 years agoPost 12
gigi

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Port-au-Prince, Haiti

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Man, I'd like to see that!

I've heard of single-bladed props, but I never imagined it would work in a heli.

Just for laughs, it would be fun to make one up. And collect bets at the field before firing it up.

If it's flybarless, how difficult is it to hover and fly? I find that on Reflex XTR, all the scale helis with the flybarless heads fly like pigs!

Gigi

My heli spending has gone way down since I got a Honda 919 :-)

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12-13-2004 06:59 PM  13 years agoPost 13
gotak

rrApprentice

Ontario, Canada

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Maybe they can do half a flybar too.

Does it mean half the repair costs if it crash?

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12-13-2004 07:10 PM  13 years agoPost 14
Wisdom-Seeker

rrVeteran

Danville, CA

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The real problem with "single blade" is the load on the main shaft bearings. The main shaft bearings are going to be subjected to a lot of side-loading as the force of the lift is not balanced.

--

Wisdom-Seeker
Protest letter to insurance co.: What do you mean "Act of God"?

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12-13-2004 07:51 PM  13 years agoPost 15
TMoore

rrMaster

Cookeville, TN

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The real problem with "single blade" is the load on the main shaft bearings. The main shaft bearings are going to be subjected to a lot of side-loading as the force of the lift is not balanced.
No more than a single bladed prop on an FAI speed U/C airplane. Single bladed heads are a novelty anyway. They work and they are fun to fool with, no more no less.

TM

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12-14-2004 01:10 PM  13 years agoPost 16
Angelos

rrKey Veteran

nr Oxford, OX11, UK

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The heli couldn't care less if it has one blade or two as long as it's balanced.
You can perfectly balance the weight but can’t balance the lift. So you will always have this force pushing the blade up and rotate around generating vibrations. Even if the model flies for a short while, pretty soon the bearing will wear out and other stuff will start falling apart from the shake.

-Angelos

Spartan RC R&D

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12-14-2004 03:34 PM  13 years agoPost 17
JKos

rrProfessor

Redondo Beach, CA

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> It just had half the lift to play with.

Shouldn't it be able to swing a longer blade and get back to just as much lift as with two blades? As noted above, it should even be more efficient.

I think I'll stick to two blades and a flybar for now.

- John

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HelicopterMain Discussion › Single bladed helicopter
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