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11-03-2015 02:56 AM  4 years ago
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lowtek

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gy401 acting strange
I banged in my Raptor and damaged the S9254 servo on rudder. I stuck in an Align BL700H I had and now now I can't bring the head up to speed without the heli pirouetting on the ground.

I made no change to any settings. Are the servos that different that I'm having this problem? Should I just go back to the S9254 or do I need to work the settings to work with this servo?

In the weeds
LowTek
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11-03-2015 03:33 AM  4 years ago
ssmith512

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Indianapolis, IN USA

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Check the servo direction - i.e. - right stick gives the correct commanded servo direction. Maybe the Align servo operates opposite of the Futaba?Steve
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11-03-2015 03:51 AM  4 years ago
pH7

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Sterling Heights, MI - USA

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Different brands of servos may (probably do in this case) move in opposite directions.

Step 1 - Make sure that the tail is turning in the right direction. If not, your belt has the quarter twist in the wrong direction. [How to check - if the leading edge of the main blades are moving forward, the leading edge of the tail blades should be moving forward.]

Step 2 - as mentioned above, check that rudder stick input gives the correct tail pitch change. If not, reverse the rudder channel in the transmitter. [How to check - if you move the rudder stick to the right, the trailing edge of the tail blades should move to the right of the helicopter.]

Step 3 - move the tail of the heli and observe the tail motion to see if it corrects to bring the tail back. If not, flip the "Reverse" switch on the gyro. [How to check - If you move the tail to the right (nose left) the trailing edge of the tail blades should move towards the right of the helicopter.]

After you have ensured the correct direction for all the above, in that order, then there should be no problem on lift-off.
Phil Heavin
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11-03-2015 12:12 PM  4 years ago
lowtek

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@ssmith512, @pH7
I could have sworn I did all these checks; but; I'm going to go through the whole check procedure again to be sure. Need a check list to make sure I follow through.
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11-07-2015 10:21 PM  4 years ago
JuanRodriguez

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The Villages, Florida

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And the result of your "checks" was ?????Been there, done that and old enough to know better.....
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11-13-2015 02:30 AM  4 years ago
lowtek

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I have 3 models stored in Tx. On one the gyro sense is on a different switch. Changed model and gyro worked.

I've also created a preflight checklist that includes all switch settings
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