second crash revolution

[sapca]

Hello,

I have the 2de crash with the Revolution due the tail starts to piro after 3 a 4 min of flying.He always start to piro to the right site.

Setup:

GY 601+9251 servo Gain in HH on 40%
149 DP receiver
Helitron regulator to 5.5 Volt
lipo 7.4 V 4000Mah


help PLZ !!!!!

Regards

Sapca

[tomfromork]

second crash revolution

Hi scapa,

How could we?

He spins cw or ccw?
Tailrotor is working fine? (Belt, Tension, Assy)
Controlrod and Servo are working fine? (Friction, Servogear)

You should be a little bit more precise.

Tom

[sapca]

second crash revolution

Hoy,

Rotor spinnig CW.
Every thing in brand new.Tension is fine.
No binding and servogears are OKE.

Just after a time the servo thurns to one way( to the right),and when I set him back in the middle(with the stick on the transmitter)the servo thurns back to its limmit on the right site.

I need to set off the power from the heli and than it is back oke for a few minits.

Regards

Sapca

[tomfromork]

second crash revolution

Hi,

did you ever try that gyro/servo with a 4,8V powersupply?
Same behavior? Setup of the 601 is correct?

Tom

[sapca]

second crash revolution

Hi Tom,

I have in all my heli's(5 heli's) this setup(GY601 on helitron 5.5v) and it works fine.

Sapca

[rototom]

second crash revolution

Hi Sapca,

could you please tell us, what exactly happened before this misfunction? What flight condition?

Was this misfunction caused by the same actions at both times?

Is the misfunction reproducable in some kind of simulation test at ground?

It really sounds to me that you have a faulty gyro or gyro servo.

We all flying 601 or 611 gyros without probs...


Regards
Thomas

[sapca]

second crash revolution

Hi Tom,

The revo flyes verry well, tail holding verry good ,bud after a time it looks like the gyro has lost his middle point,so the servo went to one way( right ) and it stays there.
When I move the stick,the servo is reacting to the stickmovements bud when I set the stick back to the middle,the servo went back to the right and it stays there.

To stop this misfunction I need to thurn off and on the power and than ik works again for somme time.

Sapca

[rototom]

second crash revolution

Does the servo moving back immediately with full speed when you center the stick, or does it move slowly (drifting)? When it moves fast, the reason should be an inititalization of you GY.

This could be caused by:

1. defective GY601 controller
2. defective tail servo
3. by mixing instructions from your transmitter
4. by impulses generated from fluffy components or bad bearings (you should also register a lot of safety holds if this would apply to your REVOLUTION)

Because I had the same prob a couple of years ago in another helicotper with GY501 gyro, I am switching of the normal gyro mode at the controller unit at every GY (even at the GY611). So only the HH-Mode is allowed and it isn't possible to initiate an initialization by bad impulses or transmitter instructions.

I would first check all gyro and transmitter settings.
Check your rc component wiring.
Send in your gyro and servo components for a check up by a Futaba service person...

If you noticed a lot of safety holds (PCM) you should think about changing bearings (for example the upper bearing at the main mast could causes impulsing, if your REVOLUTION crashed before and the bearing wasn't changed). But once again, if something like this would apply to you, you should notice a lot of holds also.

Best regards
Thomas

[sapca]

second crash revolution

I just disassembled the revo and I feel that the upper bearing is compleet lost.

I don't think there is sommething wrong with the sevo,because he is reacting verry good on stickmovements.

I dit a initialization gust before flying and saw that there came crusifixes on the display.

The settings in the transmitter are the same as in all my other models.
No revomixes are programmed.( using the 14 MZ) and there are no revomix programmed at the begin.


I think,when there is sommething wrong with the gyro that you have trubble from the begin of the flight.
By me ,it starts after a few minutes.

Regards

Sapca

[renso]

second crash revolution

I think,when there is sommething wrong with the gyro that you have trubble from the begin of the flight.
By me ,it starts after a few minutes.

hi,

and i dont think its something wrong with the revolution...

[eworm]

second crash revolution

I had exactly the same problem with my Logo and the Kontronik BEC30. I replaced it (the BEC, not my Logo ) with a regular battery (5 cells NiMh) and everything was fine.

[tomfromork]

second crash revolution

Hi folks,

To me it sounds like the gyro being reinitialized. That may be caused by either
- your transmitter
- receiver
- gyro by loss of power
- gyro by internal failure

But maybe your servo is going mad soon.

Thats all I can figure out of it. So please change sone of your equipment to verify the source of the problem.

Tom

[sapca]

second crash revolution

hi,

I think Ihave found the problem

It was the lippo !!!!

I discharged my lipo and I found that after 3 a 4 minutes the volt dropted from
7.4 to 6.2 V.Ther it stays for 3000mAh

Due the voltdrop the gyro reset himself.

Now I have put a new lipo and evrything is fine now
I also putted new mainshaft bearings,Upper and lower.

I dit today 3 flyghts and no problem annymore

Regards

Sapca

[rototom]

second crash revolution

Hi Sapca,

great to hear that!!!

Regards
Thomas