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T-REX 450 › trex 450 help needed
01-26-2012 10:20 PM  6 years agoPost 1
courtjones

rrApprentice

florida

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Okay, fellow heli flyers. I repaired my 450, everything is fine except when I spin the blades with my hand they won't spin freely. I have flipped the belt and change both tail gear so what could possibly be wrong. Thanks for the help in advance

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01-27-2012 12:36 AM  6 years agoPost 2
Fanbird

rrApprentice

Pearisburg, VA

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Did you try spining the blades without the tailbelt? If so and your blades still don't spin freely, try loosening your bearing block screws to see if they could possibly be binding. While they are loose see if it spins freely for you.

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01-27-2012 12:57 AM  6 years agoPost 3
courtjones

rrApprentice

florida

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Without belt it spins freely, if I loosen belt tension it spins freely but will skip teeth because its to loose. I'm lost

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01-27-2012 02:11 AM  6 years agoPost 4
dkshema

rrMaster

Cedar Rapids, IA

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Are you sure you only have a 1/4 turn's worth of twist in the belt as it goes through the tail tube? Any more than 1/4 turn is bad news.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-27-2012 03:03 AM  6 years agoPost 5
courtjones

rrApprentice

florida

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About to take entire tail assembly off and retry everything again, thanks for the reply's so far

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01-27-2012 04:33 AM  6 years agoPost 6
dkshema

rrMaster

Cedar Rapids, IA

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BTW -- the belt doesn't want to be tight like a guitar string, it really can be quite loose as the toothed timing belts don't slip easily. Running the belt too tight can put added drag on the drive train causing the motor to work harder and hotter (along with the ESC) and can shorten flight times.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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