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HK450 GT Pro Turning Right

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HK450 GT Pro Turning Right

Old 04-13-2011, 03:15 PM
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Urbanking
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Default HK450 GT Pro Turning Right

Hey guys,
Here is a new issue, which I cannot find much information on as far as troubleshooting. My Hk450 GT Pro with the 401B gyro will not hold straight. The NOSE will turn (yaw) right, and I cannot figure out why. It will do this in both HH and Rate mode. Any ideas on possible problem? It has done this since I built it. Making it very difficult to do any forward flight, or anything beyond a struggling hover, it will turn right at an estimated speed of about 2-3 RPM.

Thanks in advance for any assistance.
Old 04-13-2011, 03:30 PM
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gi1mo2
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Default RE: HK450 GT Pro Turning Right

My HK401B all wander, but I'm not certain it's at that speed. I do have to adjust.
Old 04-13-2011, 04:28 PM
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shawnm67
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Default RE: HK450 GT Pro Turning Right

Does this happen when you increase throttle?

Make sure you don't have any mixes on.

The only thing I can think of off the top of my head is also make sure you're gain settings right.

Other than that, check your setup.........i.e.....tail pitch slider.

Shawn
Old 04-13-2011, 08:29 PM
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Rob2160
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Default RE: HK450 GT Pro Turning Right


ORIGINAL: Urbanking

Hey guys,
Here is a new issue, which I cannot find much information on as far as troubleshooting. My Hk450 GT Pro with the 401B gyro will not hold straight. The NOSE will turn (yaw) right, and I cannot figure out why. It will do this in both HH and Rate mode. Any ideas on possible problem? It has done this since I built it. Making it very difficult to do any forward flight, or anything beyond a struggling hover, it will turn right at an estimated speed of about 2-3 RPM.

Thanks in advance for any assistance.

Have you done the Hot Glue Fix on your HK401B Gyro? It makes a huge difference.. all of mine are ROCKsteady.. NOdrift...

http://www.youtube.com/watch?v=mhdvxPG0xS8

This is my original video but I do it differently now.. see below..

[youtube]http://www.youtube.com/watch?v=mhdvxPG0xS8[/youtube]

This is my night flying heli and it has a 401B Gyro that is Just flawless after the hot glue fix.. rock steady.. no drift..

[youtube]http://www.youtube.com/watch?v=32fRPuusNUY[/youtube]
Old 04-14-2011, 06:19 PM
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gi1mo2
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Default RE: HK450 GT Pro Turning Right

My HK401B gyros wander even with the hot glue trick. They don't really compare to my 3 Align GP780 or my JR7703D. It is somewhat similar to my Telebee. Of 3 HK401B, only 2 still work. One failed (can't stay in HH mode - starts blinking after a few seconds of tail movement)
Old 04-15-2011, 08:18 AM
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Urbanking
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Default RE: HK450 GT Pro Turning Right

I have not done the hot glue fix yet. The tail slider has been adjusted and re adjusted so that is not the issue. I will Deffinately try the hot glue fix since it has helped some people. I will then replace the tail servo, maybe a better one will help? I have no other ideas. I even turned the gyro 90 degrees to try a different orientation.
Old 05-01-2011, 07:38 AM
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Default RE: HK450 GT Pro Turning Right

So I have done the hot glue fix, and tried about everything except a new tail servo. Would poor accuracy/Centering be the culprit? It is a clone digital servo.

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