HC3-SX weird swash movement

[hotroad79]

I am using helicommand hc3-sx with 2 sattelites. WR hercules for BEC. savox 2271 cyclic servos and kontronik 80+ ESC for my Logo 600SE. running 12s lipo. no RX batteries.
I made almost 20 flight with the same setup and also using bail out mode with no issues.
last week I only changed the bearings of scorpion motor. that was it, first flight after changing the bearings here is the conclusion. nothing changed at all.

Helicommand HC3-SX weird swash movement (0 min 24 sec)

[popokatepetl]

Can you try different receiver? This is definitelly NOT OK and you shouldn't fly it!

[hotroad79]

i don't think that it is the receiver because I don't use RX, just 2 satellites. i will try to change them anyway. but mostly it can happen from HC. something like short-circuit. may be reset the HC will be ok?

[rhodesengr]

The Sats are your RX in your case.

I think Popo is suggesting you try a full RX instead of Sats. You need to isolate the problem.

Look at your TX and make sure your TX signals are not jumping around.

Try disconnecting all your servos and connect them one at a time.

If you have a volt meter, connect it across your power +- and see if you BEC voltage is stable.

It almost looks like a bad connection somewhere.

[hotroad79]

Yes you are right popokatepetl and rhodesengr. One of my sat is went wrong. am really relaxed because the problem is found and going to be fixed soon. Thank you very much guys...

[gta18]

That is true! It also happen to me when one of my Naked Lemon RX sattelite got a static discharge from my hand....


It hovered fine and suddenly started twitching intermittently during flight, luckily was able to throttle hold and land fine.


The bad sat had a blinking orange light when I landed, while the good one stayed solid.

I removed the bad one and flew with only one good sat. Everything went well...

I guess a mix of a bad and good sat would still give you problems...

[rhodesengr]

Wizard of Oz rewrite:
"are you a good Sat or a bad Sat?"

[hotroad79]

I think setting up with full RX will solve the problem permanently isntead of using sats.

[ArguZ]

Flying with one Sat or Spektrum Sats in general is an accident waiting to happen.
1. The cables are fubar
2. They are (especially with the HC/BD) extremely picky about the voltage.
3. They do not filter feedback signals

A full RX does a plausibility check if the new signal fits the last one and if not just drops it.
And if you call Horizon/Spektrum they will tell you that they never licensed the Sats to Helicommand or anyone else...
At least use an external BEC and/or GreenCaps or fly High Voltage...
These suckers drop below 4.5V and its game over, with or without Captain Rescue

[gta18]

Actually I just flew with one Satellite just troubleshooting at that time. Now I always have 2 running whatever size heli I have.