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HomeAircraftHelicopterHelicopter Main Discussion › my negative pitch on rotor when we up the throttle on our horizon 203s heli.
04-19-2016 10:55 PM  31 months agoPost 1
jplot

rrApprentice

Canton, Ohio USA

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I have been working with this Horizon 203S flybarless heli for several weeks now and am puzzled by the rotor blades going to negative pitch when I move the throttle on the tx to the upper positions.
I will take any help I can get.

jplot1

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04-20-2016 03:10 AM  31 months agoPost 2
niyot

rrApprentice

Baltimore, Maryland

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I dont know about that particular felly but you have to set the servos to move in the right direction by reversing the servo travel direction in the transmitter. Make sure everything moves correctly before letting power go to the motor.

Hood HeLi : RIP Roman

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04-20-2016 04:12 AM  31 months agoPost 3
dkshema

rrMaster

Cedar Rapids, IA

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What transmitter do you have?

DX6i? If so, the manual tells you how to set your transmitter properly.

-----
Dave

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

Team Heliproz

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04-20-2016 11:31 AM  31 months agoPost 4
Cowjock

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Pa.

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Sounds like the pitch curve is setup wrong. What transmitter?

Damn that ground is hard! When's the right time to get out of this money sucking hobby?

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04-20-2016 01:02 PM  31 months agoPost 5
Ladymagic

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South Korea

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set the servos to move in the right direction by reversing the servo travel direction in the transmitter.
Not a lot of details to work with but...

If this is a newly built heli, I bet you have your swash travel reversed. Since this is a FBL setup, you have at least 2 options to correct travel. You can do like Niyot says and reverse your cyclic servos one by one through your Tx or you can reverse swash travel through your FBL setup interface.

I assume that all of your cyclic servos are moving in the same direction....just opposite of your input, so I would reverse travel via your FBL unit. It's usually just one setting to change depending on your FBL interface. Just be careful to recheck that the gyro compensates in the correct direction after you make any changes either in the Tx or to the FBL settings before flying.

You will likely need to apply power to make changes and test your setup. But as already stated, do not apply power to your motor until your ESC has been fully setup and matched to your Tx. Use external power, not your main pack for testing if you can help it. If you must use your main pack, disconnect your motor from the ESC before applying power. Best to do initial testing with the main and tail blades off for E's.

Good luck but, it really sounds like an easy fix.

Mellisa

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04-21-2016 07:30 AM  31 months agoPost 6
mr dan

rrVeteran

Stockton Calif

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Two things possible.
#1: main grips may be upside down causing the pitch link arm to be in the trailing position. This would cause the blades to go negative when the swash moves upwards.

#2: your collective direction is reversed in your flybarless unit.

"R.I.P Roman" Citizen 0094 in the Nation

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04-22-2016 05:27 AM  31 months agoPost 7
wc_wickedclown (RIP)

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long beach calif

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#2: your collective direction is reversed in your flybarless unit.
+1

Insha Allah made in america

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04-23-2016 02:45 AM  31 months agoPost 8
jplot

rrApprentice

Canton, Ohio USA

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Flybarless heli 203s by Horizon
I am sorry to be so late in thanking you all but most suggestions are difficult to follow.

This is a ready to fly unit, and I have to assume that out of the box, all settings on it should be right.????????

Let me ask a simple single question. Is there a type of helies that the high position on the swash plate travels from high (minumum blade pitch, to a low position (down) that would allow this heli to increase blade pitch to a very positive setting as it traveled from its up position down to a low position.????

The other two hilis that I a have flown puts positive pitch on the main rotor by going from the low position to the high.

I can only hope I am making sense.

Thanks to all.

jplot1

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04-23-2016 04:27 AM  31 months agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

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This us a Blade 230S. The swashplate moves DOWN for positive pitch.

Don't watch the swashplate, watch the leading edge of the main rotors. It will move UP for positive pitch.

-----
Dave

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

Team Heliproz

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