wfield0455

My Feedback: (7)

Sorry to hear this. Did you perform a range test before flying? Did you test the battery voltage after the crash ? I know you said it was a fully charged A123 but even new batteries can be bad. Did you reconnect everything and test the movement of the servos after the crash? What type of servos were you using ? How many servos ? How many battery connections to the receiver ?

From your description of the events, there are many possible causes of your problem. Not trying to say it wasn't the transmitter, just that you'll never really know if your new transmitter "let you down" until you figure out what actually happened.

Still, I hate it when stuff like this happens too...

Wayne

jonkoppisch

My Feedback: (162)

I was just looking at my log for the ultra flash. Really cool! I have the xicoy telemetry adapter and can read engine rpm etc on the JetI screen. Looking at the log I can see everything, engine rpm, throttle, fuel amount etc etc. I am curious to what the rx: q (%) stands for though.

wfield0455

My Feedback: (7)

Q stands for signal Quality and is expressed as a percentage of packets that are successfully sent from the transmitter and received by the receiver. IT is quite possible to have a very high Q value, even if some of your antenna signal strength values are fairly low.

I generally see Q values in the 98+% range when flying within the limit of my eyesight with 40% Aerobatics airplanes. Jeti has stated that due to the nature of their link, even with Q values below 50% (not sure how much below) you will have complete control of the model and not notice any effect on the servo outputs. Some have stated
that they have seen less than 20% Q without any loss of control. Based on my personal experiences, if I wasn't seeing consistently high values for Q I would make an effort to ensure that my receiver antenna placement, etc was as good as I could possibly get it. I believe that most of the guys I've seen reporting lower Q values were glider guys and they probably often fly at much greater distances than I do.

Wayne

jonkoppisch

My Feedback: (162)

Nice! Looks like mine are staying high, 80+, but there is an occasional low blip. Lowest I've seen was a 22%

Puttputt maru

Bob if you are still need of some help there is a very good tutorial here:

http://www.rcgroups.com/forums/showthread.php?t=2159040

The first part is how to set up the Cortex but then it gets into using airspeed indicator with it.

vertical grimmace

My Feedback: (1)

Under load, today, my battery is reading 6.7 volts and holding it. The battery was fine I believe. Although, that is how it acted. As if it was losing power. I do not seem to have data logging as an option on my TX. Under applications the only 2 options are Jeti box and games. Is that another upgrade to purchase for the DS 14? Knowing the voltage at the time of the event would be nice.

Jeti USA

Please have a look here, we created bunch of Short Videos explaining individual features.

Here is one explaining Telemetry & Timers
Voice Output Setting/Telemetry & Data Display
https://www.youtube.com/watch?v=Uj2VEV5NUr4



http://www.espritmodel.com/jeti-video.aspx
Introducing "Jeti Shorts", Your Express Way to Jeti Universe!!!

More Added Weekly!!!

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jonkoppisch

My Feedback: (162)

I don't know about the ds14 but it's all enabled on the ds16. It's an invaluable tool for troubleshooting for sure! Shows antennae strength, packet loss as mentioned earlier and rx voltage.

I try to always take a new receiver and put it into a foamy or small plane that I can fly long distances away and angles to range test...

jonkoppisch

My Feedback: (162)

Dup

Dansy

My Feedback: (53)

VG was the retract mechanical or electric? I have had mech retract before that were not retracting 100% after takeoff (from grass) and that suck battery real fast....electric usually not a problems. Also battery voltage has change since yesterday so I would disregard that if I were you....

vertical grimmace

My Feedback: (1)

It would seem the battery voltage could only go down from yesterday. And yes, the telemetry data logging is available for purchase as an upgrade. The retracts were pneumatic, all the radio did here is power a servo. No problems with the retracts.

Dansy

My Feedback: (53)

Well voltage would go up a little after used as the pack cool down.....I check my battery right after every flight and if I check the next the stabilize higher.

tonyos

My Feedback: (48)

Have DC16 over 2 years in one word best Radio I have ever had , Do It you will be happy ,

vertical grimmace

My Feedback: (1)

I have found the A123's to remain very flat. Never had a problem with them. Maybe the RX did not like the vibration of the engine. I had close to 100 flights on that plane. I just swapped the RX and trimmed it out. Flew it, and the radio failed. That is all I know. I would still have it if my old radio was in there. Disappointing. I am really not planning to purchase the upgrade to check the history. I probably could not get it to download into my TX anyway, just like the other upgrades I purchased.

oconcj

My Feedback: (1)

Hi VG

Sorry about your crash. I'm fairly new to Jeti also, switching between Spektrum and Jeti. I also run A123's. They say whoever they is that most radio failures are batteries or switches. I know you think it was the Jeti, but I would guess the battery. Who's A123's were you using and switch? It seems that the slow failure would be more electrical and not radio related. I know people keep asking questions, but just trying to help. I have been flying for 40 plus years with no radio failures, but some switches and a few battery issues, mainly years ago. Hope I helped.

Chris

wfield0455

My Feedback: (7)

Are you certain that the Data Analyzer isn't included on the DS14 Basic. I looked on the Esprit website and they don't seem to list an upgrade price. Perhaps I simply missed it or perhaps it gets turned on with some other features. Still, the Data Analyzer seems a pretty basic diagnostic tool to verify that your equipment and installation is operating as expected and it really should be there in all versions in my opinion.

One thing that hasn't been suggested is to connect the DS14 to your PC and look in the logging directory. Even if the Data Analyzer ISN'T installed, the transmitter may still record the telemetry and log it to a file so it can be replayed on a PC. Even though I have the Data Analyzer on my DS16 I have installed DataExplorer http://www.nongnu.org/dataexplorer/#downloading and can use it to examine log files created by the DS16 on my Mac. It's a free program and assuming your DS14 DID record a log file but just won't display it on the transmitter, it may help you understand exactly what happened. If you decide to try to install DataExplorer and run into any issues, feel free to send me a PM and I'll try to help..

Walo

Were all your devices (Servo, Gear...) approved for HV (High Voltage)? I know that some servos do not like A123, even if they are rated for 6,0 Volts.

Regards, Walter

LA jetguy

A very few "early versions" of the CB200 do not retain battery capacity metering on a power cycle. I have eight CB200 and only two of them suffer from this issue and they are from the earlier release batch.


Apparently its a know issue and has been brought to the attention of Jeti engineers and just recently they have posted an update version 1.25 for the CB200's.


http://www.hacker-motor.com/download...-version-1-25/


I do not think its a critical or essential upgrade, only certain devices having the battery (Accu) capacity retention issue (on power cycle) can upgrade if that is an issue for them.


Also, a new software update for the receivers has been posted on Jeti web site (http://www.jetimodel.com/en/Download...rs-Tx-Modules/) . This new version is number 3.24.


This version comes in several formats, but for most users the standard version can be used. Below are the release notes for the update:


- RSat2: Signal intensities from antennas are now swapped so that A1 & A2 respect the numbering found on the receiver case.


- All receivers: More precise and jitter-free servo pulse generating (precision 0.125μs).


- Update for all R- receiver types (R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R14, R18).


Hopefully we should see the above updates, as well as the device software "CBOX400.bin" for CB400 on Esprit soon.



Wish you all a Happy 4th of July holiday, be safe and enjoy your Jeti system, the best on the current market...


David

AndyAndrews

If it was the battery wouldn't the low voltage alarm go off? even with A123's it can be set to any low voltage you want. What was your's set to?

LA jetguy

If I remember correctly the default out of the box RX voltage alarm is set at 4.5V.... if that is not adjusted it will not warn you properly. I have moved away from Life and A123 batteries due to the fast drop of power when near empty... the Lipo's have a steadier decline and don't drop "off the cliff" like A123 or Life batteries..

AndyAndrews

When you set up the alarm you have the option of setting the new default based on the voltage you want to be warned at. Anyone using A123s using the default voltage warning of 4.5V is simply not properly utilizing the radio.

wfield0455

My Feedback: (7)

While now I set my Rx Alarm voltage for A123s to about 6V, when I first got my DS16 I didn't know enough to change it. I had both A123 packs fail in my airplane and the first thing I noticed was the engine skipping due to the low voltage to the Tech-Aero IBEC that powered the ignition, shortly after that the low voltage alarm sounded. While I had already decided to land due to the engine missing I was able to land the airplane safely and taxi back to the pits before the engine quit. The servos were getting pretty slow but the pack still read about 4.4V when I got back to the pits. This was in a 100cc airplane with 8, JR 8711 servos in it so I'm sure this would vary based on the type and number of servos. If I had the alarm set to 6V as I do now it would have been a total non event with enough time to go around a couple of times if needed.

When you look at the discharge curve as a graph, A123s look like they fall off a cliff but in reality with decent telemetry even as steep as the discharge curve is, they still provided me adequate time to land safely.

Wayne

Custmachr

My Feedback: (3)

Sorry for your crash. There are many possibilities. I would like to add a couple more. This being an existing model is it possible you were overdriving one or more servos mechanically. The Jeti travel at 100% is equal to approx 125% in a spectrum and most other systems. So if you had your servos set at 100% in you old radio you would need to limit the end points to 80% in the Jeti. Also based on your description it sounds like you may have head a servo overheat. This could have been caused by the above condition, the 6.6 volt batteries vs 4.8, or the refresh rate set in the receiver if you were running standard servos. I suggest if possible firing up your system and letting the radio cycle the servos and see if any heat up. Just my two cents. Hope you find the issue. I have only been flying the DS-16 for a few months but find the capabilities outstanding.
Tim

Jeti USA

It's official Jeti DS/DC-24 line of radios will have 3x RF modules, 2x 2.4GHz will work in Standard or Dual Path Configuration and 900MHz module as additional backup if the system experiences interference on 2.4GHz.

Jeti is killing it again.

Zb/Jeti USA

mr_matt

My Feedback: (10)

That is the one I have been waiting on.