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Ace Hobby . Esprit Model . Thunder Power RC

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Align T-REX 600N 700N > T-REX 700N Spartan Gyro losing HH in middle of Flight
 
 
Rockohaulic
Elite Veteran
Location: Valencia, CA, USA, 3rd Rock from the Sun

In 3 of the last 4 flights my Spartan gyro has completely lost heading hold in flight. And get this, when it fails, it is driving the servo to a hard left command!

How's that for a fun flight!

On the last flight, I started with a good initialization, and got a half tank through it with it working absolutely fine. Then I did some multiple forward flips, and I noticed it did not stay anywhere near the same position, sure enough, when I pulled out, the heli was fighting me and wanted to yaw left.

On the bench I noticed 3 things. The RX light was solid - so this was not a low voltage issue. The blue light on the gyro was blinking - but the manual only tells me this means "error" big surprise there. And the servo was driven hard left - not centered. When I commanded hard right and then let the stick self center, it moved hard right, but then drove or drifted very fast to a hard left position. What a crappy failure mode!

Has anyone seen this before? Everything else seems to be working fine.

I got a helicopter for my girlfriend,
It was a good trade!
08-05-2008 04:59 AM
 
 
The man
Veteran
Location: at home

Sounds like the gyro initialize itself in flight. what setup do you have? Power, servos, etc.
08-05-2008 05:40 AM
 
 
Rockohaulic
Elite Veteran
Location: Valencia, CA, USA, 3rd Rock from the Sun

It's a very robust power setup.

2100 TP Li-Po/deans connector direct to Reg (no switch)
Reactor-X
BLS451 servos
Spektum 7000 RX.

Like I said, it was not a low voltage issue, the RX lights would have been blinking.

I got a helicopter for my girlfriend,
It was a good trade!
08-05-2008 07:37 AM
 
 
Droid
Elite Veteran
Location: Deep down in the Southwest- UK

Don't own one myself , but sounds like it has corrupted software. I would send it in for service.

Quotes may have been changed for my own amusement
08-05-2008 08:08 AM
 
 
snapshot
Senior Heliman
Location: Norwich, UK

Do you have the flash cable?

If you do you can check the firmware version, there was a new release recently. Which uses 2 versions of the config, if one becomes corrupt it uses the other and rewrites the original.

But I would contact Spartan, they are usually pretty quick in trying to resolve problems.

I have 3 and have never come across this problem.
08-05-2008 08:37 AM
 
 
The man
Veteran
Location: at home

Another thought is a loose connection for the cable inside the gyro. Maybe due to vibration. I would send it in for service. I am not that good a pilot to try again if it has the same symptom 3 times.
08-05-2008 08:49 AM
 
 
Angelos
Key Veteran
Location: nr Oxford, OX11, UK

Rockohaulic,
create a support request on our website and I will guide you through some more tests and arrange its return for service if needed.

If the gyro LED was doing a slow continuous flash with equal on and off times it means error. Currently the only source of error is signal not being received from the receiver which will point to a broken cable or possibly the servo robbing on the sharp edge of the carbon frames and shorting there.

If the LED of the gyro was doing a quick double blink while the stick was centred it means that it was seeing a rudder stick input. From your description of the servo behaviour this seems to very likely be the case. This will be due to the rudder neutral being re-initialised and there are only two possibilities for this.

* Stick neutral memorised during boot and thus a brown our could cause it in flight. If you are using the latest firmware 1.08 brown outs are taken care of by the firmware and it boots into calibrated state, so this would have not been possible.

* Gyro detects three very quick toggles between Rate/AVCS modes. Perhaps a broken gain cable or intermittent connection or shorting to the sharp edge of the frame could cause eventually cause a glitch that is seen by the gyro as three quick mode changes, thus recalibrating the stick neutral.

Pull the gyro out and check the wire carefully.

-Angelos

Spartan RC R&D - Visit us at our local club www.helicollective.org.uk
08-05-2008 09:44 AM
 
 
Rockohaulic
Elite Veteran
Location: Valencia, CA, USA, 3rd Rock from the Sun

Thanks Angelos!

I submitted a service ticket this morning.

I am going to pull the gyro off the heli, inspect it, and ship it to you for service. Let me know if you want me to do any more troubleshooting on the bench before I ship it.

Thanks again!

I got a helicopter for my girlfriend,
It was a good trade!
08-05-2008 07:44 PM
 
 
Angelos
Key Veteran
Location: nr Oxford, OX11, UK

Great, I will get back to you on that shortly. By the way. I will be at IRCHA from Wed to Sat. If you are going you can catch me there.

-Angelos

Spartan RC R&D - Visit us at our local club www.helicollective.org.uk
08-05-2008 07:50 PM
 
 
Rockohaulic
Elite Veteran
Location: Valencia, CA, USA, 3rd Rock from the Sun

Not going. But that would have been cool...

I got a helicopter for my girlfriend,
It was a good trade!
08-05-2008 09:56 PM
 
 
inkspot1967
rrProfessor
Location: cranston ri.

one word is all you need bud.

solid-g....lol

Trex700e outrage 12s Solid-G Tyler Bonta Flybarless
Next-D Rave Flybarless vbar
WENZEL CANOPYS
08-06-2008 04:07 PM
 
 
catzazz
Senior Heliman
Location: Vancouver Island, BC, Canada

Had the same problem when I first put gyro in my T-rex 500. Luckey for me I notice this on the bench.

What I did to fix the problem was, make sure that the gyro is starting in HH when you turn on the RX, Spectrum takes a few millsecs to connect, remove the linkages and re-program the gyro from the start.Hook linages back up to set end points. Make sure you complete the setup and then re-boot the gyro. Make sure you are using the proper frame rate.

Make sure that the TX is on then start the RX. make sure that the gyro led is solid then I did a re-bind and it seemed too take care of the problem.
One thing that I did notice with the spartan gyro is that any kind of linkage binding will cause the gyro to do this. Also not sure where you have the gyro mounted but I found that using 2 layers of tape with plate in middle and making sure that it is as far away from the bearing on tail box made it work better.

Cheers, MM

Fly like you borrowed it!! Land like you stole it!!
08-06-2008 04:53 PM
HOMEPAGE  
 
 
3dhiro
Heliman
Location: Scotland

ink, why is the solid-g better?

http://www.helifreak.com/showthread.php?t=72932
http://www.helifreak.com/showthread.php?t=76349

You aggressive promoting behaviour isn't helping anyone mate. It just makes me and many other despise CYE products. I am seriously thinking about having a word with CYE about their reps.
08-06-2008 04:57 PM
 
 
inkspot1967
rrProfessor
Location: cranston ri.

get over yourself im not a rep for CYE just a completely satisfied customer.

Rock is a buddy of mine and im busting his balls

so go call /email and cry to CYE and they will tell you im not a rep.

Trex700e outrage 12s Solid-G Tyler Bonta Flybarless
Next-D Rave Flybarless vbar
WENZEL CANOPYS
08-06-2008 05:07 PM
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

inky, mate, wtf is this? why do you have a beef with spartan? only 2 days ago i commented on this very thing. this thread is asking about spartan gyro, so what is the benefit of punting solid g into the frame? please show some respect to spartan and indeed CYE and stop doing this. i have to say i don't think you are tied with CYE but you want to be. if that is not the case it is the impression i have got from your comments here and elsewhere.

btw i AM a spartan pilot and do not hide from it but i will never go into a solid g, or any gyro thread and say screw X and buy Y. it does the end user no good....choice is good and each to their own.

cheers


www.waterfoothelis.com
08-06-2008 05:36 PM
HOMEPAGE  
 
 
inkspot1967
rrProfessor
Location: cranston ri.

raptorheli2

i was busting my buddy Rockohaulic balls it was just a few weeks ago he pm'ed me and asked me which gyro i would buy and i told him i never owned a spartan gyro so i would have to say a solid-g since i have used them before and loved them.

so everyone get there panties out of a bunch and get over it or go cry like a baby to Mark Ryder and get me pinked or something for nothing like you guys always do and go wah wah wah......

its as simple as that.

Trex700e outrage 12s Solid-G Tyler Bonta Flybarless
Next-D Rave Flybarless vbar
WENZEL CANOPYS
08-06-2008 06:02 PM
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

inky, i'm a little dumbfounded by your stance here. as a long term forum user and i would consider a friend over the forum i wouldn't goto mark for anything like this. i'm just saying, from my point of view your on the CYE bandwagon and pushing it a little too hard in the wrong places (i.e a spartan thread).

if someone asks what gyro should they buy then fair enough, you can certainly say the solid g......but you do know your wrong

cheers


www.waterfoothelis.com
08-06-2008 06:07 PM
HOMEPAGE  
 
 
creightoncarr
Veteran
Location: Missouri City, Texas - USA

SOLID-G ROCKS

Bring it on!
08-06-2008 06:09 PM
 
 
3dhiro
Heliman
Location: Scotland

ink,you post "solid-g" to every thread you find the opportunity. If you are not a rep, you are probably a wannabe. That's not the right way to do it mate. Right now you are an embarrassment to CYE. But what I don't understand is why you have "Rave mini-g" on your signature. Both products are not on the market yet. Special treatment from CYE and then you expect anyone to believe you are impartial!
08-06-2008 06:11 PM
 
 
raptorheli2
Elite Veteran
Location: rip off britain and no changing it

Quote 
SOLID-G ROCKS

spartan...designed for helis...not rocks.

cheers


www.waterfoothelis.com
08-06-2008 06:16 PM
HOMEPAGE  
 
 
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Mikado Modellhubschrauber . GrandRC . CanoMod

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Align T-REX 600N 700N > T-REX 700N Spartan Gyro losing HH in middle of Flight
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