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HomeAircraftHelicopterBeginners Corner › What is Runout adjustment and how to do it?
04-20-2009 07:36 AM  9 years agoPost 1
Ragz

rrApprentice

India

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Any literature on the subject would be great.

thanks in advance.

Anurag

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04-20-2009 01:43 PM  9 years agoPost 2
MaxAdventure

rrVeteran

Northern CO

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runout - how centered your clutch is on the crank shaft. View: http://www.rchelimag.com/pages/howt...howto=25&page=2

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04-20-2009 04:40 PM  9 years agoPost 3
BarracudaHockey

rrMaster

Jacksonville FL

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Well anything that spins can be checked for runout.

Andy
AMA 77227
http://www.jaxrc.com

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04-21-2009 07:09 AM  9 years agoPost 4
Ragz

rrApprentice

India

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OK thanks. And this does make a huge difference in performance?

Anurag

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04-21-2009 01:27 PM  9 years agoPost 5
BarracudaHockey

rrMaster

Jacksonville FL

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Performance? Not really.

But you can tell just by looking at a helicopter in the hover if the person slapped it together in an hour or if he/she took the time to check runout and balance, its smooth as glass. Once you fly one thats built that way you wont want to fly anything less.

Andy
AMA 77227
http://www.jaxrc.com

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04-21-2009 10:07 PM  9 years agoPost 6
Leifning

rrNovice

Kongsberg, Norway

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It depends on what you are adjusting. Adjusting run out in a main shaft normaly means finding what component that has to be changed.

Runout = vibrations. Too much of it will affect wear on parts, gyro performance, screws come undone etc - so keep an eye on it. Transtional vibrations at spool up arent that important, you are looking for the ones that are affecting your bird when you are at flying RPMs.

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04-22-2009 09:41 PM  9 years agoPost 7
w.pasman

rrElite Veteran

Netherlands

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It can make a huge differnce. Vibrations may cause foam in your tank which in turn may cause engine problems. The gyro may act up under the vibrations. Parts may crack and/or fall off. Electronics may get damaged causing crashes.
But all helis vibrate a bit anyway so a little runout should be no problem. Faster rotating and heavier parts are more important to check than smaller ones. Vibration goes with the SQUARE of the rotation speed but linear with the weight so check the FAST moving parts first (clutch and fan)

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