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Home✈️Aircraft🚁Helicoptere-MikadoOther › 1400 RPM Head Dampers
04-27-2009 05:09 AM  10 years ago
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DKNguyen

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1400 RPM Head Dampers
I'm planning to run a Logo 600 at 1400 RPM with 600mm blades. Do I need softer aftermarket head dampers? Blades flap the most at lower RPMS right?
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04-28-2009 01:01 AM  10 years ago
Griffo

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Why such a low headspeed?
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04-28-2009 01:36 AM  10 years ago
DKNguyen

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Battery life and mechanical wear. It also makes it easier for me to build the ESC. It's also an estimate of what headspeed can be maintained without bogging with the battery and motor combo I've picked under what I plan do to do with it.
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04-28-2009 01:41 AM  10 years ago
Griffo

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That headspeed seems very low for 600 blades.
The green K&S dmapers are nice. It might take a few flights to wear them in though.
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04-28-2009 03:02 AM  10 years ago
HAV

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Central Florida

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I occasionally fly my L-14 at 1400hs with 139gm Mikado 580 blades with the medium stock dampers. I tighten up the blades a bit more than usual and have never had a problem with wobble. HAV
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04-28-2009 04:44 AM  10 years ago
DKNguyen

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I thought wobble (in a balanced system) happened because the lower headspeed means the blades have to flap more. Wouldn't tightening the blades more just make it worse? Or are you tightening to prevent a boom strike?
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04-28-2009 12:37 PM  10 years ago
HAV

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Central Florida

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Boom strike from lagging.
I have a little fixed pitch we fly in a small gym and without tightening up the blades or having springs to keep a little lead in the blades, it will go into a death wobble. Fun to watch really. The 139gm blades are the heaviest I have. Lighter blades have worked as well, but the Mikados are heavy, wide, with a thick camber. I have gotten down to around 1250hs with them, but not too fun that low. HAV
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