Fury Extreme Kicks tail right

[nguyen23464]

Question:

I cant seem to solve this issue ever since i bought the heli. My fury extreme tails kicks to the right when doing a power move. Any hard power out, flip, funnel breaks the tail.
Tried adjusting the gain up and down, cant get it dialed in.
Forward flight seems fine. But anything more the tail cant seem to hold.
It also has a poor roll rate. Im not sure if the 2 are related some how.
Kicks with govenor on or off.


Running a futaba 601. YS91, new motor, have about 2 gallons through it, with needles set like the manual. gv-1, 10 1/2 pitch both sides, and 9c radio.

Tried adusting from 37% all the way up to 55 with no luck.
The tail is setup at 0 degrees, no offset at netural unlike the 401.

the settings off the gyro are:


G37a

G: 1A100%
ACGA120% ACGB120%
D1IB 0%
D1DB 0%
Trk +0%
Mode AVC
Fmod F3C
AVS 100%
Lmt A130% B130%

I have 120% Dual rate and my afr is

70
70
45 pitch
and it still doesnt feel very responsive. No where near like my 50 with 9252's.


Even with all 9457 airtronics servos.

Could it be a slipping clutch?
If so is there a easy way to check it?


any suggestions would greatly be appreciated.

thanks,


Jamie

[DavidH]

The tail is setup at 0 degrees, no offset at netural unlike the 401.

Don't understand why you would have 0 degs in the tail blades at neutral.

The MA tail slider is setup so that when the pitch slider is in the center ( neutral) that the tail blades have about 10 degs right thrust in them. If you have 0 degs at Neutral, then your throwing more one direction than the other.

You never mentioned what head speed your using on the rotor head. Not the head speed you have set in the governor. But have you actually tached the rotor head in flight and make sure it is turning the rpm you think it is.

YS91, new motor, have about 2 gallons through it, with needles set like the manual.

From that quote I seriously doubt the motor is maintaining RPMS. With the needle settings that are in the YS 91 instructions. I would suspect your motor is running rich and not producing power.

David

[flyinfool]

I agree with David.
You may be bogging the head which in turn reduces tail rpm and effectiveness and at the same time puts a huge load on the tail from the high pitch on the main blades.
Try reducing the pitch on the mains to +/- 9 or 9.5, till the engine is broken in and the needles are set correctly, and delivering full engine power.

Check the temperature of the clutch-bell immediately after landing, if the clutch is slipping the bell will be hot.

[nguyen23464]

cool deal,

thanks guys. I will be home from korea in 2 days and will have do as suggested.

I havent put a tach up to it yet. But I am very sure that it is producing very poor power.

When checking with the gv-1 max rotor speed idle 2 "1850"
It couldnt reach it even at full throttle, maxed at 1810.

Im always scared to lean it in too early. I could feel the plate for about 10 seconds after flight.

Maby go back to 30% to be on the safe side? And reduce pitch afr till broken in as suggested. How far do you guys usually have the needles out after essentially broken in?

10 degrees pitch on tail huh? ic ic.. I take it pitch slider going inwards right david? And center it out in normal mode?

I hope its not the clutch giving out. I barely even fly this heli. And even so I'm very easy with it.


While Im here you guys mind me asking one more question?

Needles set like manual. When hitting throttle hold from higher rpms. And then releasing throttle hold when still in higher rpm's. The engine seems sluggish and wants to die. Do I need to lean or richen the hover or idle needle there?



thanks guys,



Jamie

[WayneBrown]

sounds rich on idle and midrange.
Just tune on it, you should get there.

[DavidH]

10 degrees pitch on tail huh? ic ic.. I take it pitch slider going inwards right david? And center it out in normal mode?

The Extreme tail pitch slider is designed. So that when the pitch slider is directly in the middle of its travel on the output shaft. The tail blades have enough pitch in them that the heli will hover straight ahead. This is designed in the system. When setup correctly, you can look down from above the rear of the tail box. And the pitch bellcrank should be square with the tail box. You want it set up this way in all flight conditions. There is no reason to try and put 0 degs of pitch in the tail blades.

David

[angelob]

When checking with the gv-1 max rotor speed idle 2 "1850"
It couldnt reach it even at full throttle, maxed at 1810.

Im always scared to lean it in too early. I could feel the plate for about 10 seconds after flight.

Are you still running the break-in settings?

Hover - 1.75 open
Full - 1.25 open
Low - 1.25 open

If so, you can definitely start leaning out the engine since you indicated you had at least 2 gallons through it.

From my experience (and altitude, weather conditions, etc) You should be able to turn every needle in by 1/4 turn and go from there.

Also you might want to check your GV1 to make sure you have the right gear ration programmed in it.

Angelo

[nguyen23464]

And the pitch bellcrank should be square with the tail box. You want it set up this way in all flight conditions. There is no reason to try and put 0 degs of pitch in the tail blades.


cool, ill give it a shot. Are there any videos that demostrates the tail setup?



Are you still running the break-in settings?

Hover - 1.75 open
Full - 1.25 open
Low - 1.25 open



yeah, still running those settings. I'll lean it all in a quarter and go from there.
Thanks

[nguyen23464]

thanks guys,

Being way way to rich was the problem exactly. Adjusted all needles and runs great. All problems on the extreme solved so far except one.

Gv-1 is giving me problems. I read some places that the gv-1 is sometimes times too slow?
But it seems to let the heli overspeed. Sensor checks out fine with 97%
But the max rpm on the gv-1 is showing overspeeding.

I have a flight mode on 1750. And after flying with mild loops and rolls. Max rpm checks out alot higher around 1900-2000. But in mild climb outs and just hovering its keeps the rpm as programmed.

Today,
I'm gonna throw a tach on it and watch where it changes.
I think im gonna throw a rev max on it.




thanks for all the input,



Jamie

[DavidH]

The GV1 max rpm will normally show 50-75 rpm more on the Max RPM than the speed is set. That is normal. When your doing vertical lines and have the head unloaded the head/engine is going to overspeed some. You really want it to overspeed some in those situations so that the governor does not pull out too much throttle.

David

[nguyen23464]

The GV1 max rpm will normally show 50-75 rpm more on the Max RPM than the speed is set. That is normal. When your doing vertical lines and have the head unloaded the head/engine is going to overspeed some. You really want it to overspeed some in those situations so that the governor does not pull out too much throttle.

David


ic ic,

I was worried that the sensor may be going bad. about that, how about when programed at 1750 and max rpm sensed at 2000. Normal?


thanks david,


Jamie

[nguyen23464]

sigh,

tail doesnt kick anymore. But doesnt hold very well. Breaks in backwards flight and in funnels. forward flight is fine.


gain at 37. Maby my servo is worn out or so. =/

[Zilly]

sigh,

tail doesnt kick anymore. But doesnt hold very well. Breaks in backwards flight and in funnels. forward flight is fine.


gain at 37. Maby my servo is worn out or so. =/

Before you start chucking more money at it why don't you look at how its set up, did you revert to the tail being offset as it should be?

What tail blades are you running?

Are you getting tail drift when hovering even a slight turning either right or left?

Have you really worked on getting that engine leaned out to the best settings?

Does the tail breaking away coincide with the engine bogging down?

etc.

Stick with it, if all else fails then go for a new servo however it souds like this is quite a new set up in which case the servo should not have worn out yet.

z

[DavidH]

I would think the setup is messed up.

Can't get the best settings on the engine while running the governor.

I would also find it difficult to consider the servo as being bad.

David

[nguyen23464]

cool guys,

the fury is flying really good now. Tail is rock sold at 35% gain.
90 degree set up. and changed the tail blades and it flys really smooth.



Flying a 90 still is intimadating, but it gives me so much more confidence when I go back to the 50 everytime I fly the 90.



thanks for the all the help guys.


Jamie