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Home✈️Aircraft🚁HelicopterVario Sky Fox - Benzin - Evolution - Xtreme › Boxer clutch shoe clearance?
02-19-2020 11:23 PM  39 days ago
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Badgerfarm

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Missouri

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Boxer clutch shoe clearance?
Does anyone know what the recommended clutch shoe to liner clearance is for a Vario Boxer? Mine seems really tight. I've had to machine clutch linings on other helis after installing a new liner but this is a relatively low time heli.
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02-20-2020 12:01 AM  39 days ago
JuanRodriguez

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The Villages, Florida

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I would suspect that the “standard” 8 thou clearance should work ???Been there, done that and old enough to know better.....
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02-20-2020 12:07 AM  39 days ago
Notar

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Taxachussetts

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You installed a new liner? Was the material a Vario liner, or generic material? What adhesive did you use to install it? Why did it need a new liner on a low time machine?
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02-20-2020 12:08 AM  39 days ago
Badgerfarm

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Missouri

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I wasn't sure since it's a 4 stroke OS 160 twin. I would think that they would engage at a lower rpm? I thought I would ask before chucking it up in the lathe and making changes.
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02-20-2020 11:19 AM  39 days ago
Notar

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Taxachussetts

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If its factory, it should be fine out of the box. That is one of the best flying helis they had. The motor killed the deal though with the cost. The dual exhaust sounds like a little Porsche.
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02-20-2020 11:36 PM  38 days ago
Badgerfarm

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Missouri

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Notar,
No, it's the factory liner. I was only pointing out that I have had to open up the clearance on new liners in the past but those were for 2 strokes which would need to engage at higher rpms than a 4 stroke twin. I thought someone might know right off the top of their head what the suggested clearance was.
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02-21-2020 01:15 AM  38 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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/
/
You are correct.

By theory, you need same power to engage clutch, no matter is 2 or 4 stroke motor.
So, A 4 stroke motor needs less Rpm to engage clutch because of higher torque at same power.

Power is rpm x torque

/
Saludos cordiales,
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