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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Balancing main blades
04-26-2013 01:54 AM  7 years ago
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jusrap

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Asia

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Balancing main blades
I've read a few threads on balancing blades, with the cog or moment methods debated.

I have found when I cog balance my blades I still have a vibration. When moment balance the blades the vibration disappears.

Anyone else found this to be the case?
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04-26-2013 08:16 AM  7 years ago
hootowl

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How do you moment balance?Wolves don't lose sleep over the opinions of sheep
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04-26-2013 11:07 AM  7 years ago
jusrap

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Static balancing..Life's sweet
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04-26-2013 01:35 PM  7 years ago
TMoore

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Currently there isn't any equipment commercially available to balance blades dynamically on a model heli. Any balancing that is done is static only.

If you balance blades like some of the manufacturers do, it is no wonder that there will be an occasional case of the vibes. Vic @ VBlades uses a KRP to minimize out of balance conditions on his blades.
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04-26-2013 02:07 PM  7 years ago
MartyH

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I've had great luck with blades from MSComposit, MAH and Mavrikk. I've had a couple sets of Radix that needed balance attention. Not banging on them, just saying they required some balancing effort. To the OP, static balance and some attention to balance detail goes a long way.
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04-26-2013 02:49 PM  7 years ago
KevinB

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Earth

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MartyH,

That's interesting you mentioned Radix mains being out of balance.

I had gotten out of the habit of balance checking on carbon blades since the quality on name brand blades these days is usually excellent.
I was chasing a vibration on my Embla and it turned out to be the Radix tail blades. When I put them on a high-point balancer, they weren't even close. Then I checked another set of Radix tail blades I had on a different 450 and they weren't great either. I then spot checked a few sets of Edge tail blades and they were all bang on for balance.

Radix were my go-to tail blade of choice, but I've now switched to Edge.

KevinB
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04-26-2013 02:57 PM  7 years ago
MartyH

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Again, I'm not trying to bash anyone and I think highly of Radix. It's just that like you, I got away from checking and with the MAH and MSComposit carbon blades I have been running I have been able to do that. But, when I have had a main blade out of balance, it's been Radix.
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04-27-2013 05:14 AM  7 years ago
KevinB

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I'm not trying to knock Radix either. Just stating what I've found lately. Perhaps the QC needs to be stepped up a little ?
I haven't had a problem with Radix mains to date, although I haven't bought any for a couple years now. I prefer the pop of Mavrikk Pro WC blades and have been using them for the last while.

KevinB
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