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04-26-2004 12:01 PM  13 years agoPost 1
Airbuzzer

rrNovice

Germany

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Hello guys

I´m flying a great Fury Extreme with 710mm MAH´s and 105mm tail blades also MAH. In addition i use a GY-601. But when using full pitch approx.10° the heli turns a little left with it´s nose. Could the reason be that the tail blades are too small ? Or what is the reason for that ? Rotor RPM during that was at 1500 and at 1800. Better use 110mm ?

What combo do you use on rotor and tail ?

greetings

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04-26-2004 01:36 PM  13 years agoPost 2
cjw

rrVeteran

UK - Cheshire

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Could it be the gyro gain? Maybe increase a little and see what that does - although the 601 doesn't seem to need a high gain on my Fury.

I'm running 110mm SAB tail blades and GY601 and it is rock solid in full power climb out at 10+ full pitch.

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04-26-2004 11:50 PM  13 years agoPost 3
SAL

rrVeteran

Oakville, Ontario, Canada

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Are you using HH mode, or normal mode when this happens..... ????

Gain on the 601 should be anywhere around 34 - 40 percent.

.

[color=red]SAL[/color]

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04-27-2004 07:45 AM  13 years agoPost 4
vitek

rrKey Veteran

Corvallis, OR

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How well is your engine tuned? Even with a good T/R setup, a poorly tuned engine will give you a sloppy tail.

Travis

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04-27-2004 07:48 AM  13 years agoPost 5
Dave_D

rrKey Veteran

Philippines

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Happened to me too...

Just re-adjust your tail rudder control rod so that it it stops drifting during power climbs.

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04-27-2004 09:59 AM  13 years agoPost 6
Airbuzzer

rrNovice

Germany

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Yes it happens during HH mode the gain is approx. 50% when flying at 1800 rpm. The rod is adjusted that way that the tail is straight during hover in normal and in AVCS.

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04-27-2004 07:39 PM  13 years agoPost 7
fitenfyr

rrProfessor

Port Orchard, Washington

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Loading..

My Fury does the same thing.
I am flying 710 V's with an OS91 SXH (not C-spec)
Flat out it is bogging the engine down at full pitch and slowing the tail rotor down.
Try backing off the pitch just a hair and see if it goes away.
50% IMO is too high for that 601. You are going to eat up the servo at that gain.

Jason Stiffey
Fly Fast....Live Slow...

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04-27-2004 11:30 PM  13 years agoPost 8
Torkroll

rrApprentice

Bakersfield Ca

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check for revo mix that should be zeroed out.

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04-27-2004 11:55 PM  13 years agoPost 9
pdman

rrNovice

West Chester, PA

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Simple Solution

The problem is that the rudder neutral position is not set correctly.

The gyro manual explains how to do this. There are two ways to do it.

Method 1. Linkage adjustment:
Take the gyro out of HH mode using (WITH NO REVO MIX) and
bring the heli into a steady hover (apply rudder input as needed to prevent rotation). If the weather is windy, hover the with the nose into the wind. Adjust the rudder linkage (NOT TRIM) until very little rotation occurs without rudder stick input. You can also adjust the SUBTRIMS but remember to save the trim settings in all flight modes.

if you have a transmitter switch to take the gyro into and out of HH mode, wiggle it back and forth 3 times within 1 second to set the rudder neutral position. If no switch is set up, turn off the heli, power it off and then back on.

Method 2. As per the manual:
Bring the heli into a steady hover (very little rudder input should be required if in HH mode). Land the heli. Wiggle the switch described above back and forth 3 times within 1 second. This will set the rudder neutral position.

Any changes made to the rudder trim requires readjusting the rudder neutral position.


This solution will solve your rotation (turn) problem.

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04-28-2004 08:21 AM  13 years agoPost 10
Wes

rrApprentice

Jonesboro, AR

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or you could do it right

Just set the limits too full and you should get full travel, adjust the linkage so it travels fully both ways. square servo horn, square bell crank in the back and it will be equal throw. (wow so much easier and so many less words to read)

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