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View Full Version : Having trouble with Heli-max MX400


Evan
02-24-2008, 01:43 AM
Hi guys,
So when i take off the tail just spins in one direction.
I'm not sure if it could be the gyro or whatever.
How can i check if the gyro is screwing up?
Or whatever else needs to be fixed?
Thanks

birdDog
02-24-2008, 02:14 AM
Which direction does the tail spin? Hows the headspeed? You need a good deal of rpm's to get good tail authority on a belt drive. You may need to reverse the gyro.

Evan
02-24-2008, 02:31 AM
ok well the heli spins counter clockwise
What is headspeed?
Thanks

birdDog
02-24-2008, 02:47 AM
Headspeed is how fast the actual main rotor spins. This translates to tail rotor speed as well. If your tail rotor is not spinning fast enough, it cannot push enough air to control the tail.

You should look through finless bob's set up videos over at helifreak. They cover trex and hdx models but have the same pricipals as with most r/c helicopters.

http://www.helifreak.com/showthread.php?t=41692&page=7

http://www.helifreak.com/showthread.php?t=11373&page=145

Evan
02-24-2008, 03:24 AM
ok thanks for all the info.
I really appreiciate it.