CH-4 Belt

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doenute
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CH-4 Belt

Post by doenute » Sat Jul 04, 2015 3:47 pm

What would you do?

On one set of upper assembly holes the belt whines...index it back only one set of holes and the tips of the prop have about 1/2" wiggle before the engine compression stops them.

Which would you go with??


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Bill

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Ol Yeller
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Re: CH-4 Belt

Post by Ol Yeller » Sat Jul 04, 2015 4:54 pm

Looser without a doubt. When the belt wines it's too tight. Hard on the bearings.

rjfjr
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Re: CH-4 Belt

Post by rjfjr » Sat Jul 04, 2015 7:28 pm

I agree looser run for a few hours maybe 20-30 then try adjusting it again if still whines run it looser

doenute
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Re: CH-4 Belt

Post by doenute » Sun Jul 05, 2015 9:25 pm

Thanks. Definitely sounds better looser. It has 70 hours on it like this--any ideas when it might stretch out a bit as it implies in the CH-4 Instruction manual? They seem to indicate a belt only needs to be tightened once or so in its life.


Bill

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Bruce
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Re: CH-4 Belt

Post by Bruce » Sun Jul 05, 2015 10:28 pm

Belt drives whine... When you start it loose does it clunk at an idle and once it warms up is the slack gone?
12 foot Mamba "The Underdog"
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doenute
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Re: CH-4 Belt

Post by doenute » Mon Jul 06, 2015 9:49 am

When loose it actually sounds and feels pretty good. Just never had the situation on my old CH-3 where I could move the prop tips because of slack in the belt like this one. That got me nervous enough to ask here.


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Bruce
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Re: CH-4 Belt

Post by Bruce » Mon Jul 06, 2015 10:35 am

doenute wrote:When loose it actually sounds and feels pretty good. Just never had the situation on my old CH-3 where I could move the prop tips because of slack in the belt like this one. That got me nervous enough to ask here.


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every ch4 ive heard has seemed much louder than my ch3 wider belt i guess i dunno if its warm and it still has slack its too loose
12 foot Mamba "The Underdog"
Tired Gpu 520,Whirlwind Razor X

doenute
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Re: CH-4 Belt

Post by doenute » Mon Jul 06, 2015 12:07 pm

I could not believe how stiff the CH-4 belt was when I put it in.

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