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is it possible?

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Old 09-22-2005 | 02:02 PM
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Default is it possible?

so heres what i want 2 do.
i have a dragonfly 36, 30a esc 3200kv walkera motor 10t pinion
it has the original 2 rotor head. but i thought .. i could do with more..

so i want 1 or 2 more blades on the rotor.. total of 3 or 4... (maybe 5)
i thought if i put an extra blade and make the pinion 5t it might work..

but im not too sure.. will it draw too many amps with 3 blades even though the pinion is halfed.
and even if it doesn draw too much.. will the speed be enough for lift off?

i can do some minor modifications for the rotor head.
(i havent got one but im plannin on buying one.. thats if it will work?)

Thanks in advance
Old 09-22-2005 | 02:48 PM
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Default RE: is it possible?

I don't think they sell multiblade rotorheads for micros, and if they did, you'd need some serious torque to spin them
Old 09-22-2005 | 02:56 PM
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Default RE: is it possible?

if they sell multi rotor heads for micro i, i dont know about em..
but id really like one..
and i know id need alot of torque.. i was asking to see if my motor will be enough
Old 09-22-2005 | 04:06 PM
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Default RE: is it possible?

Your question does not have a simple answer. Their are many factors that have to be calculated in order to answer your question. Such as blade size, weight, compisition. Motor torque, speed and such. Thake a look here http://www.geocities.com/flyingmouse..._contents.html its a good start.
Old 09-23-2005 | 07:41 AM
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Default RE: is it possible?

In order to go with a higher blade count rotor, you have to go flybarless. This has a whole set of complex setup issues that are much harder to deal with than selecting an appropriate motor.
Old 09-26-2005 | 05:36 PM
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Default RE: is it possible?

well it shoudn't be too hard if you had the right materials. you could just attach the swash directy to the blades, (just a tiny two ball clip for the swash to the blade ball). take that and just make the servos very limited. that should in theory do the trick. I don't know how you'ld have adjust ible pitch though...
Old 09-27-2005 | 07:43 AM
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Default RE: is it possible?

Yes, linking the blades directly to the swash allows control without a flybar.
But you are missing the point that this introduces severe flight control problems that have to be addressed.
What you are describing is a simple mechanical setup. If this were a workable solution, the manufacturers would use it.
Without addressing several issues, it is not a workable solution.
Old 09-27-2005 | 08:55 AM
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Default RE: is it possible?

I saw a video recently of a flybarless Hornet II. It appeared to be flying pretty well. It only had two blades, but there were no obvious problems with it.

I guess it's possible with model heli's.... Seems from what I read when googling flybarless isn't all that uncommon on models.

But it does seem to come with it's own issues that need to be understood when attempting it, as Vince suggested.

David
Old 09-27-2005 | 02:44 PM
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Default RE: is it possible?

I've also seen a flybarless eco-8. It's my understanding that control response isn't as stable (predictable?) on a flybarless head as one with flybar for control.

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