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Home✈️Aircraft🚁HelicopterVario Sky Fox - Benzin - Evolution - Xtreme › Give me a clue why this happened please?
05-21-2007 09:43 PM  13 years ago
DenisS

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england

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OK, got the gear off the small bell housing, removed the lip for retaining the belt on the big bell and the 57 tooth gear fits directly onto the 23 tooth pulley on the big clutch bell. Have retained it with loctite 641 and will fill in the belt tooth gaps with JB weld and drill a couple more 2mm hollow pin holes on the inside to retain the pulley. The only problem is that when I put the clutch on the taper it rubs on the inside of the bell, as you can see from the centre photo, it was doing that before even though I machined some off the clutch itself to clear it. I will have to do it a bit more on this otherwise it just locks solid when I tighten it. Ho hum Got to wait for the new 90t white gear before I fit it back on the motor as the white gear won't clear the bell. The big clutch is item number 830/61, is this the XLV one?

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05-21-2007 09:48 PM  13 years ago
Vario_UK

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UK

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Hi Dennis
Can you give me a ring tomorrow.
Regards
John.
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05-21-2007 09:57 PM  13 years ago
DenisS

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england

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Hi John
Yes will ring you tomorrow, I thought you were away till 22nd- oh that IS tomorrow. G'night
Denis
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05-21-2007 10:26 PM  13 years ago
hootowl

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Garnet Valley, Pa.

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Tap the bell down with the wood end of a small hammer. Go around the bell, tapping it. I had the same rubbing issue. Tapping it down fixed it.Wolves don't lose sleep over the opinions of sheep
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05-22-2007 07:35 PM  13 years ago
DenisS

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england

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Hi Mike, will do that but what's to stop it moving back again. Spoke to John White, he agrees it looks like a clutch slip incident and is confident that the bigger clutch will solve any issues. He is getting the parts to me as soon as possible so that I will be able to attend an event in two weeks time. Pleased with his quick response. Thanks to those guys that suggested solutions.
Will keep you informed.......
Denis
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05-22-2007 07:37 PM  13 years ago
hootowl

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Garnet Valley, Pa.

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All I can say is once I tapped mine down it wasn't rubbing anymore and has been good ever since.Wolves don't lose sleep over the opinions of sheep
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05-22-2007 07:54 PM  13 years ago
DenisS

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england

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Ok Mike, thanks
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05-23-2007 09:34 PM  13 years ago
DenisS

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england

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Ok, got the new gear from John White-thanks for quick service- (fan will be here soon). Got it all fitted, had to machine the rear of the clutch to stop it rubbing on the inside of the bell, took about 1.2 mm off the thickness (16mm down to 14.8mm), also had to machine the heads of the four cap crews that hold the motor in as the gear is slightly wider than the pulley so as I tighten the pulley it was rubbing on the bolts. Took a mm off those aswell. Now it is all fitted and turns smoothly, will fit the mechanics back in the fuse on Friday then fly it on Saturday. Fingers crossed it will all be OK.
Denis
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05-23-2007 11:58 PM  13 years ago
Notar

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Taxachussetts

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When you install the clutch bolt, you should start to tighten the bolt, and feel the bell to see if its free. When you get to a spot where its not free, you tap the perimeter of the bell with a wood block until it is free, then tighten the bolt more. Keep doing this until the bolt is tight, and you have a free moving clutch.
Joe
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05-24-2007 12:28 AM  13 years ago
cfranks

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Adelaide South Australia

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Denis, for those motor bolts that interfere with the pulley, I use Button Heads. No machining required.
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05-24-2007 04:51 PM  13 years ago
DenisS

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england

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Hi cfranks, I thought about button heads or hex heads but didn't have either so just stuck the bolts I had in the lathe.
Joe, thanks for the tip, I still can't see what would stop it from moving back without you knowing though, and with my luck that's exactly what would happen, hence my 'belt and braces' approach.
Will make room for the clutch fan and air outlet too tonight.
Thanks again
Denis
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05-24-2007 05:07 PM  13 years ago
heliraptor

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Colchester, Essex, UK

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Denis

Did you get the fan as well ???

I wouldn;t mind a fan for my Huey if it will fit in the box section that is.

Any part numbers ?

Lee
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05-24-2007 05:11 PM  13 years ago
DenisS

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england

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The fan will arrive tomorrow (i think, John White is doing his utmost for me). Part number is 830/67. Did you have any trouble with yours?? Did you get the disk with your pics and the flying?
Cheers
Denis
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05-26-2007 06:39 AM  13 years ago
DenisS

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england

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Update: got everything fitted yesterday, apart from the clutch fan which should arrive today, and everything is good. No clutch slip, no blade slowing and no melted gears. Although it sstill gets hot it is nowhere near what it was before. Will fly more this weekend, fan should arrive today. Thanks to John White for quick service.
Denis
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Home✈️Aircraft🚁HelicopterVario Sky Fox - Benzin - Evolution - Xtreme › Give me a clue why this happened please?
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