V bar log help please

When you reached the crash did you notice if the power was disconnected or the sats were flashing ?

Hi Don, I didn't notice the sats flashing I'm afraid, but that's not to say they weren't. I was so stuck on it being the battery out of juice, I kind of ignored all else. A few seconds after it hit the deck, the servos started buzzing, a sound we hadn't noticed straight after it pranged, but you know what it's like when your heli has just gone in...... stunned silence, followed by "this is going to cost a bomb", then reality kicks in again.

cheers

I would say, fix it all back up, and do some testing on the bench etc, no main or tails on. And also try the vibe anilizer also. Then recheck your logs.

V bar log help please

To a layman it certainly looks like you have antenna issues and total loss of signal for 7 seconds.hopefully someone more experienced can shed some light

I have a log here that is very similar missed inputs then swap antenna....my 600 nitro just fell out of the sky...the tail went into a slow piro engine cut and no inputs...just fell too the ground I do think mine went into failsafe...and my rx battery was good....mybe its solar flairs who knows.....

I should have said that it has heat shrink on the antennae. I have taken it off now, as I remember someone at our club having had 2 brownouts shortly after covering his antennae with heat shrink. Coincidence maybe??, but it might make me feel safer, if nothing else!!

It was a very weird day, we totalled a trex 250, stripped the 450 gears, pranged the 500, after tail fin holder broke, totalled my logo, Luke's 700 and Steve's 800.
Oddly, the 250,450,500 and logo were all along a similar line when they went wrong??? Spooky huh?? maybe higher forces than sun spots at work here??

well I get swap antenna on log s as well but is that how spectrum works ,if one antenna loses then the other takes over , have to say I have heat shrink on my sats ,never had a problem , but ill remove it for a day see what the logs say, u say tail twitched could it be static ?

I do not know how too put the pdf on here...but its the same 4 errors then a swap antenna all through the log...if it was glitching it would not of been in such an order...and mine is a nitro powered model as well it still cut out...I think due too the failsafe after it lost signal...solar flairs is all I can think of....

I have all the earthing straps on the heli, so doubt, nay hope it's not that.

According to the blurb next to error message, if sats are used all channels are blamed for any "incident" vbar sees?? I just hope it was a simple brown out, I can do without throwing good money after bad, chasing a problem that may not be there

Did you post on the Vbar site.

VBar Forum | VStabi

That is certainly a very vibe free log file. I have tried everything and still get plenty of raised vibrations.

Have you done a range check?

I didn't know about the Vbar forum Tbh, thanks, I'll give it a try. I hadn't range checked it recently (hope I'm not going to be shot down for saying that ), but when it came down, it was only 50-60feet away, yet we had been flying it way further than that earlier, with no issues.
I'm glad to see you think it's pretty vibe free, as my mate had been 3D ing it 2 flights before. Not mad 3D, but a LOT harder than my usual pottering haha. A few hard stops, into rainbows etc, which looks pretty demanding on the heli.

My main concern, I guess, was to try to rule out a total power loss from the ESC, or battery connections (EC 5's) etc. I can live with the odd brown out, if that was the case, but don't want another prang if it's something fixable.
Cheers,

Have to confess, I'm no log expert, but just reading through it, it looks to me like ...

Between time 0:00 and 4:05 there are no issues. Occasional sat switches, but that's normal as far as I know.

At 4:12 it loses all input and attempts to fix by switching sats again.
At 4:13 on the other sat, it still sees no input.
At 4:14 to 4:16 it continuously switches sat trying to find input, but gets none.
At 4:19 it registers extreme vibration. I would guess this is the heli hitting terra firma!

In short, it was fine until 4:12 where it suffered complete loss of signal from both sats simultaneously.

So, to me it doesn't look like a sat issue since I think it's unlikely that both would fail simultaneously. So, the obvious common component is the transmitter - was that fully charged? (as others have said - range check!)

Unfortunately, the other common component is the vbar itself, or its integration components with sat rx's.

Another observation is that it happened at 4 mins into the flight. So whilst the LIPO still had 42% charge - it's possible I imagine that the volts may have been dropping under load? Though I'd imagine the VBAR would record this if so (does the vbar record low voltage? - don't know, but I'd imagine so).

What about satellite positioning? Do you have them properly installed (ie. 90 deg to each other, clear of carbon etc.). Unlikely as a cause I think, but worth a thought.

As already mentioned - I would fix and bench-test without blades. If you could get hold of a separate RX unit (eg. AR6210), you could isolate the Spektrum components from the equation. Then, if the problem goes away, you know it's something with the vbar. If it sticks around, it's a Sat or Transmitter issue?

Just my 2p ...