Topic SubscribeRC Helicopter Event Summary
WATCH  4 pages [ <<    <     2      3     ( 4 )    >    >> ]10406 viewsPOST REPLY
Encore RC . ExperienceRC . JR AMERICAS
. .

Radio - Spektrum DSM

 >

Spektrum DX8 Failing and Helis falling out of sky.

rexxigpilot

Elite Veteran

Florida

BTW The Align bec from the stock speed controller that I did not trust apparently is better than the separate 10Amp CC BEC that I thought would give me better protection
Wait a minute. You said that you were using the 25A CC Pro BEC before, which is it? The 10A CC BEC isn't even capable of 3A continous! I tried the 10A BEC on full size servos and it could not even operate 3 digital servos without overheating.
I tried it with the Castle BEC Pro and my 6s battery I also tried it off heli with another battery,a 4.8 fully charged Nickle Metal Hydride,and also was only using at the last two separate tests , 2 servos and same thing was happening.
This is NOT a problem with Spektrum!

01-15-2012 Over year old.
imrerun

Heliman

Houston , Texas

My Bad

The bec I have is the 10amp not the bec pro

01-15-2012 Over year old.
Busher

Key Veteran

Manchester, England

That bec won't handle what you are throwing at it, it is not up to the job. The specs seem to indicate that it will manage but bench testing on this bec has always fallen a bit short of specs, Probably due to lack of cooling / installation etc.
But you are asking alot of the castle bec with the loads you are placing on it. I hate to say it but the align bec can handle peak currents better than most, but align gets slagged off for poor quality or is that mis aligned for poor quality.
The better quality becs are expensive and for good reason, Western robotics make a good bec but they are pricey, they handle load though and deal with peaks correctly.

The bec on the Kontroniks is very good, I can't get it to brown out my receiver (spektrum) with 3 x ds610 and 1 x bls 251 no matter what I do with the sticks, and the ds610 are current hungry spike happy servo's,but you pay through the nose for the product.

I have a hobby king bec that was $6 and that is rated at 5 a and for the most of my bench work it holds its own with the best, would I trust it in the air? I don't know for me it is just too cheap to risk but that is not a logical conclusion. Find a good bec you can trust and then you can relax and enjoy your flying.

Good luck
Busher

01-15-2012 Over year old.
imrerun

Heliman

Houston , Texas

Castle service bulletin i found too late

http://www.castlecreations.com/supp..._advisory1.html
I talked with a friend and he also said the western robotics were suppose to be good.
But for the sake of saving some money I am going to use the Align bec and a separate receiver battery for now on the rebuild as well as on a new 550V2 fbl
I got almost finished that will be identical. I have really loved the way the 550s are feeling for me.I used the Align bec on the 600Pro v2 fbl also with the beastx. And it never failed so good for Align and maybe later get a better bec and eliminate the separate receiver battery

01-15-2012 Over year old.
dkshema

rrMaster

Cedar Rapids, IA

The standard CC BEC -- 10 amp version is not what you want to use here. The 10-amp thing is a peak rating, not average or typical rating.

According to the data sheet for that BEC, if you are using a 6S input, the maximum continuous current is rated at 5 amps, and it is recommended that you replace the stock connector going to the receiver with something capable of handling more than 5 amps.

More than likely, the BEC is overall capable of providing the current necessary to keep things running under light load conditions but when you are moving all controls quickly, you may be seeing momentary drops below the RX minimum operating voltage, something your volt meter isn't capable of capturing.

-----

You need to use a power source that is actually capable of supplying your electronics with not only sufficient voltage, but sufficient current under all operating conditions.

The CC BEC PRO (I can hear people groaining because it's a CC product) is capable of doing the job, and has two separate output connectors to provide sufficient current to your load.

-----

To be on the safe side, also make sure that all your servos are able to move freely and are not binding or getting mechanically stalled throughout their movement. This can cause all sorts of bad things to happen, particularly drawing excessive current during a stalled condition.

-----

You should also make sure that whatever is carrying the current (with respect to wire size) is of a large enough gauge as to not be causing large voltage drops as the current increases.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

01-15-2012 Over year old.
Evan03

Veteran

Idaho

I was having brown outs and bought a CC because pro. It apears to be a good unit. My brown problem went away. I bought because its versitale and will have many future uses and I'm already flying castle speed controls so the choice was easy specialty concidering the price.

My dx8 still hasn't crashed and I've stopped worring, dang good radio in my opion.

01-16-2012 Over year old.
Adam Henley

Senior Heliman

Puyallup, WA. USA

Been following this thread. Was just wondering where the term "brown out" comes from. Is it because if your RX loses power you have to clean the brown out of your pants?

I've never met a helicopter I didn't like :)

01-16-2012 Over year old.
HOMEPAGE  
spinny02

Heliman

Houston,Tx

that is funny. I did 5 times in less than a min. For the recored i have a Castle BEC pro v2 set to 6v. Ordering a WR BEC tonight.

JS

01-16-2012 Over year old.
spinny02

Heliman

Houston,Tx

WR BEC came damaged in the mail =(. They have since shipped me a new one.

I removed my rx and tm1000 + sensors. I am nor running two DSMX sats from the 3gx powered by a 2s lipo TP 65c and the castle BEC Pro. I have not had any brownouts in 10 flights.

I am going to start adding components back in and see where she fails =(.

I think i also got hit with the DX8 vibrator issues. Both my MCPX acted a bit funny when the timer when off. I cant say for sure just yet.

JS

02-01-2012 Over year old.
aerocal

Senior Heliman

Central California

As far as I know the term "brownout" is from household electricity jargon.When there was a severe lowering of the available voltage a lightbulb starts to appear dim and more of a brown color than bright and white or kind of yellow.

02-02-2012 Over year old.
wkma7six

Heliman

LA,CA-United States

Rudder pot finally acting funny....

Had over 500 flights with various heli's from mCPX, TREX 450 PRO FBL, mQX, mSRX, and this doesn't include the time when hooked up to Phoenix sim. My rudder pot is finally going bad and it is getting sent in to Horizon as it seems to fall under the gimbal recall bulletin. Spoke to a Horizon tech yesterday and was told I should send it in for service.

Noticed this issue with a slight drift on my heli's and more noticeably on the sim since I had to recalibrate the TX each time I plugged into sim. I was wondering why the heli's I was flying in the sim was acting like a rate gyro and decided to look at the channel monitor. It showed anywhere from 15-23% from center stick and as I moved the gimbal up and down, the rudder percentage value would shift from 22% to 1% without touching the stick itself. FYI, If some of you DX8 users are experiencing any sort of drift issues or tail not holding well on your heli's, check your channel monitor and follow the Spektrum bulletin to test the gimbals on your TX.

Hers's the link:
Scroll down to the bulletins section.
http://www.spektrumrc.com/products/...?prodid=spm8800

03-04-2012 Over year old.
plasticdoc123

Heliman

Palm Springs, CA

Definitely a Dx8 issue

I had a crash of my new Trex 550 v2 FBL heli after buying it new with a new DX8 at the AMA show Jan 2012 in Ontario CA. I thought there may be some issues with the antenna, BEC, transmitter, so I sent it all back the Align and HH and I got a new BEC, and they apparently checked and updated the DX8. I flew the Trex 550 several times and no problems but tonight I was showing my brother my MCPX and it was flying fine but the Vibration/ tone alarm went off and the heli went out of control and crashed all of a sudden. I the realized that there is an issue with the vibration/ timer on the dx8 since now it was doing it with a heli that has non of the same parts as the TRex 550. I tryed to duplicate the problem on the ground hovering the MCPX using the monitor screeen and have not seen a problem yet but I am going to try to duplicate the problem again. If I have another crash with the MCPX or the Trex I will smash the DX8 and buy a different TX since it is not worth sending it back and forth and dealing with an inferior inconsistent problem. I know that others have been happpy with the DX8 but I have faith that the others that have had problems are also good pilots. I have never read so many issues with other TX like what I have seen for the DX8. Finished discusstion!

04-29-2012 Over year old.
RAK402

Key Veteran

Alhambra, CA

You might look to see if the antenna is still connected inside the transmitter. There have been two of those reported on another forum.

Evidently they passed the ground range check, too.

Team KBDD/Team Compass/Prostar Hobby/Team JR Americas/Gens Ace/Robird Demo Pilot/WR Field Rep

04-30-2012 Over year old.
aerocal

Senior Heliman

Central California

plasticdoc
Before you smash it to bits let me know.Ill send someone over to pick it up and give it a good home.

I havent found any machine yet that responds well to being threatened with a hammer.Ive had my MCPX hit the LVC right when the timer alarm was going as well.Did you shut the alarm off and see if it still does it? You might be surprised.Turn the timer down to like a minute and see if it still does it with a little more assurance that its not LVC.

05-01-2012 Over year old.
plasticdoc123

Heliman

Palm Springs, CA

Is it possible that the voltage from the dx8 goes low when the tone/ vibration alarm goes off! The voltage on the dx8 reads no lower than 4.8 volts. I tried to duplicate it nwith the heli idleing on the ground with the vibration going off and I cant get it to do it. I have a call in to HH to check on some things.

05-01-2012 Over year old.
Busher

Key Veteran

Manchester, England

It is more than possible that the voltage lowers with the extra load on the system from a vibration motor. This can be observed by watching the backlight dim slightly as the alarm pulses.
Whether this is capable of lowering the voltage to a level that affects the TX transmission is doubtful, unless you are almost completely flat, but before that happens the Battery warning should operate, that of course depends on how the alarm is configured in your TX.

I have had no issues with mine and its one of the original batch, I did however have to send it in as it fell in the re call batch number. This was dealt with quickly and returned in less than a week.

The re call on vibration motors has never been explained to me by Horizon, they would not say what they had done in my TX when I sent it in. They did however confirm all was well and there was no defects. I had heard rumours that some faulty motors were causing a problem with the rf board and that was the cause of the model reacting strangely when the vibration alert came on. Some people after the recall reported a different motor was fitted to their TX others say a new motor and a Capacitor was fitted. I don't know as mine just works. I am sure if you send yours in explain the problem fully to their tech dept they will check it and fix any issues.

Good luck
Busher

05-02-2012 Over year old.
plasticdoc123

Heliman

Palm Springs, CA

I noticed that when the alarm / vibration goes off the lights on the front of the DX8 ( the colored bars on the front of the unit) blink after the vibration. When it is on Tone there is no blinking at all. I wonder if your unit does that also or is that a sign of something wrong in my unit. The DX8 was at 5.0 volts on the screen. No signs of low voltage.

05-02-2012 Over year old.
Busher

Key Veteran

Manchester, England

Just tested mine, on timer count down with tone and vib alert 4.8v shown on screen, the orange light bars do slightly dim with each pulse in line with the screen light dimming with each pulse.
They do not go out and come back on again, that would be very bad news if they did.

Good luck
Busher

05-02-2012 Over year old.
plasticdoc123

Heliman

Palm Springs, CA

Thanks. Atleast I know that that is normal.

05-03-2012 Over year old.
WATCH  4 pages [ <<    <     2      3     ( 4 )    >    >> ]10406 viewsPOST REPLY
HeliDirect . Heli-Max . Scorpion Power System
. .

Radio - Spektrum DSM

 >

Spektrum DX8 Failing and Helis falling out of sky.

 Print TOPIC Advertisers 

Topic Subscribe

Saturday, November 29 - 3:24 am - Copyright © 2000-2014 RunRyder   EMAILEnable Cookies