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HomeAircraftHelicopterHIROBOOther › Clutch to Liner clearance.
10-15-2005 03:01 PM  12 years agoPost 1
Mikerobe

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Green Turtle Cay,Abaco, Bahamas.

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Hi Guys,
I'm going to be replacing an OS.60 with a new OS.70 on my Freya and while I'm in there,I want to make sure the clutch to liner clearance is correct. The previous clearance allowed the the engine to rev too high before engagement. This also causes horrible vibration prior to engagement.
This is a new Freya, that probably doesn't have 2 gallons of fuel used on it yet so I don't want to replace the liner. Can I tweak the clutch shoes using feeler gauges, caliper etc?

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10-15-2005 03:13 PM  12 years agoPost 2
airdodger

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Johnston USA

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You need to replace the liner, and maybe the clutch. Did you have a hot start? Also don't forget to fill in your profile. Chris

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10-15-2005 04:26 PM  12 years agoPost 3
Mikerobe

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Green Turtle Cay,Abaco, Bahamas.

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Hi Chris (airdodger),
No I didn't have a hot start.
The original clearance that Hirobo uses allows for too high an rpm before engagement. I've gone through this scenario before with an older Eagle and I was able to correct it by opening the shoes on the clutch. Just didn't know if anyone else had done the same with an Hirobo clutch on the Freya.
I don't like the high rpm for engagement and it certainly doesn't need this much clearance for an auto disengagement.

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10-15-2005 06:20 PM  12 years agoPost 4
JariN

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Turku, Finland

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Don´t bend clutch shoes, engagement rpm goes down a little bit every time you fly, in my Freya it is a little low at this moment. Once i bent shoes for that and it took only a few flights to broke shoes.

JariN

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10-15-2005 06:43 PM  12 years agoPost 5
airdodger

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Johnston USA

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How much is the clearance, I agree don't bend the shoes. The cut in the clutch should be the same dimension along the length of the shoe. Chris

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10-16-2005 01:30 AM  12 years agoPost 6
Mikerobe

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Green Turtle Cay,Abaco, Bahamas.

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I haven't measured the clearance yet, but this is something I want to correct at the time of my new 70 installation.
Surely someone out there must know what the correct clutch to liner clearance should be on the Freya, which will provide a fast idle engagement and not a screaming engine one.

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10-16-2005 01:35 AM  12 years agoPost 7
airdodger

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Johnston USA

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I set mine at 12-14 thousand total. Chris

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