RunRyder RC
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 3472 views POST REPLY
HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsV-Bar › Bad Silver line sensor cause crash
11-08-2012 11:31 AM  7 years ago
Ronald Thomas

rrMaster

Gainesville, Fl, USA

MyPosts All Forum Topic
Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2012 11:50 AM  7 years ago
rilopez825

rrVeteran

Pembroke Pines, FL

MyPosts All Forum Topic
I had a pack that couldn't hold its load (lol)
It was a life pack and on the log you can see the voltage warning which did no good. Because after 3.3v there was no more log and I bet that's when my Heli came falling straight down ad crashed. I was setting up for a high auto. It came down in a spiral and crashed near where I was standing.
The log showed
5.5 v warning
Then a 4 v
And the 3.3 but before the 3.3 it had a ton of errors. I don't have the log anymore but it was. Bad life pack that causes that crash.
Richard
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2012 01:18 PM  7 years ago
MrMel

rrProfessor

Gotland

MyPosts All Forum Topic
Just to clarify because it's easy to misread the error codes.

Bad RX pack always show drop in 4.5, 4.0 and then last step is 3.3 and 2.5

There is two measuring points in the VBar, the 3.3 rail is on the processor, so if you ONLY see those, it means something draw too much power on the 3.3 rail.

You have then
1. Sensor
2. RPM sensor
3. Spektrum Satellites.

Any of those shorted, a bad cable, or faulty could cause a dip on the 3.3 rail.

If you do some bench testing you will see that just unplugging and re-plugging the sensor while vbar is running will render those errors, i.e. its VERY sensitive.

so when I look at a log, and if I see 3.3 rail drop only, I know it's not the RX pack.
if the satellites switches along with it, its a good probability of a satellite cable, but if the sensor error comes too, it could be either.
Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2012 01:54 PM  7 years ago
rilopez825

rrVeteran

Pembroke Pines, FL

MyPosts All Forum Topic
This was over a year ago and yea now that you mention it did drop 5 then 3 something. As I said before I do not have the log and it was the battery. I flew the same electronics after the crash just not the same battery.

It was that battery's second flight ever.
Richard
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2012 02:57 PM  7 years ago
BladeStrikes

rrElite Veteran

Shelby TWP,Mi

MyPosts All Forum Topic
MrMel
Just to clarify because it's easy to misread the error codes.

Bad RX pack always show drop in 4.5, 4.0 and then last step is 3.3 and 2.5

There is two measuring points in the VBar, the 3.3 rail is on the processor, so if you ONLY see those, it means something draw too much power on the 3.3 rail.

You have then
1. Sensor
2. RPM sensor
3. Spektrum Satellites.

Any of those shorted, a bad cable, or faulty could cause a dip on the 3.3 rail.

If you do some bench testing you will see that just unplugging and re-plugging the sensor while vbar is running will render those errors, i.e. its VERY sensitive.

so when I look at a log, and if I see 3.3 rail drop only, I know it's not the RX pack.
if the satellites switches along with it, its a good probability of a satellite cable, but if the sensor error comes too, it could be either.
Mine was for sure the RX pack and the logs never showed voltage dropping below the 3.3V error .This is how I tested it and like I said,log never showed a error below 3.3V rail drop..

Watch at YouTube

Took that pack back to the hobby shop and swapped it for another new one,didn't get the 3.3V rail drop anymore and didn't get anymore lock-outs..Like I said,3.3V was the lowest the log showed and it never got the 2.5V error..If it was something binding which nothing was,I would still get the 3.3V error but 100+ flights later all is good..
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2012 03:13 PM  7 years ago
BladeStrikes

rrElite Veteran

Shelby TWP,Mi

MyPosts All Forum Topic
rilopez825 I had a pack that couldn't hold its load (lol)
It was a life pack and on the log you can see the voltage warning which did no good. Because after 3.3v there was no more log and I bet that's when my Heli came falling straight down ad crashed. I was setting up for a high auto. It came down in a spiral and crashed near where I was standing.
The log showed
5.5 v warning
Then a 4 v
And the 3.3 but before the 3.3 it had a ton of errors. I don't have the log anymore but it was. Bad life pack that causes that crash
rilopez825 This was over a year ago and yea now that you mention it did drop 5 then 3 something. As I said before I do not have the log and it was the battery. I flew the same electronics after the crash just not the same battery.

It was that battery's second flight ever.
Funny you said that because thats exactly what happend to me.I always used 6.6V LiFe packs,exact same pack in my 50/90 size helis over a year..Built my 600N and used a lipo for the first 40 or so flights and logs were perfect.Wanted another LiFe pack so bought a brand new one and crashed the first flight with it.The test I did in the last video I posted showed nothing but 3.3V rail through the whole log and never dropped below 3.3V rail.Wish I dida screen shot of the log because the whole page was filled up with 3.3V....
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2012 03:30 PM  7 years ago
OICU812

rrMaster

Edson, Alberta, Canada

MyPosts All Forum Topic
Crap Lon your turning into a vbar pro there lol. ...Once upon a time there were Nitros, flybars and frequency pins...
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-08-2012 05:50 PM  7 years ago
MrMel

rrProfessor

Gotland

MyPosts All Forum Topic
Different thing doing pitchpumps, you drain the caps and when they re-charge you get the 3.3v, but there is other hints in the log.

My point was:
Do not make early judgement because of a single error in the logfile, its all about the sequence.

I've seen those spending 100's of dollars on things because they think the error means one thing for certain, where it's just a "cause and effect error" where it's an effect of the main cause.
Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-09-2012 04:50 PM  7 years ago
jadams

rrKey Veteran

East coast USA

MyPosts All Forum Topic
If I am not mistaken the new silver sensor is the same or similar to the cgy750 sensor. That being said I had a sensor failure on my 750. The helicopter did not lose all control but it felt like I had little to no avcs active. Basically it was all over the place but I was able to land.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-09-2012 09:51 PM  7 years ago
esmoglo

rrKey Veteran

Florida USA

MyPosts All Forum Topic
Mine plowed into the ground like a lawn dart. Wish I had control because it would not have hit my wallet for 1K.

The V-bar log is certainly useful tool but it’s not the be all/end all in terms of what caused the crash. The heli has since been rebuilt flown and tested with exact same receiver pack, same exact 12S lipos, same exact silver line box. The only thing that was changed is the sensor silver line to blue line. So far so good no issues or data errors.

I have found that data logs are not as accurate as some would think. I worked on large multimillion dollar aircraft 777,767, and may other smaller glass cockpit type aircraft and I have little faith in dada logs they are only a tool.

My silver line sensor is currantly being replaced that’s good. I wonder if a wire came loose inside the sensor or some other unknown failure. Again I still like my V-bars and over the past three years I have purchased at least 12 of them not one had an issue until this one.
Ugly can be fixed stupid is forever!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-09-2012 10:19 PM  7 years ago
blade3d

rrElite Veteran

New Jersey USA

MyPosts All Forum Topic
Well let's see if this problem happens more often, am about to install one silverline my first VBar.Blade3d
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
11-10-2012 12:03 AM  7 years ago
BladeStrikes

rrElite Veteran

Shelby TWP,Mi

MyPosts All Forum Topic
MrMel
Different thing doing pitchpumps, you drain the caps and when they re-charge you get the 3.3v, but there is other hints in the log.

My point was:
Do not make early judgement because of a single error in the logfile, its all about the sequence.

I've seen those spending 100's of dollars on things because they think the error means one thing for certain, where it's just a "cause and effect error" where it's an effect of the main cause.
I never got a voltage error doing pitch pumps untill I put the new pack in..Still do them all the time and no voltage error.When I had the lock out I got the normal start up test,good health and the 3.3V rail,nothing else..Once it hit 3.3V she was dead in the water..

Just saying he should check the pack just to be on the safe side and doesn't cost money to do so ..
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
02-12-2013 04:06 PM  7 years ago
Rogman88

rrElite Veteran

West Monroe, LA

MyPosts All Forum Topic
Mikado replaced my silverline sensor and all the errors are gone! Nice green messages throughout the log. I've only hovered on the side of the house. The tail holds well but I'm going to have to go through MrMels tail setup vid again as it's been a year and a half since I've had to do anything to the tail. The tail bounces after a hard piro stop. I think this may be because I changed to the latest firware upgrade when trying to get the broken sensor working. I'll get that fixed next time I have the laptop at the field.High Voltage just works better
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-15-2013 12:44 AM  7 years ago
BobOD

rrElite Veteran

New York- USA

MyPosts All Forum Topic
Glad you sent it in Rog...and glad you're finally all fixed up.Team POP Secret
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 3472 views POST REPLY
HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsV-Bar › Bad Silver line sensor cause crash
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Wednesday, July 8 - 2:21 pm - Copyright © 2000-2020 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online