Without igniting the brand wars, suggestions to trouble shoot my problem.

Today while flying a practice for a upcoming airshow I suffered a lockout. The controls went hard over just long enough to trip the ECU shutdown on my RTI and force me to land deadstick I am using a DX7 with AR9000 rx and remote. I do not think the issue was brownout as I do not recall the light flashing. The controls going over tends to make me believe that it is not wire, battery or switch to the RX. I have almost 70 flights on my setup.

Help

Kome. did you by any chance use a data flight log for your radio equipment? reading any fades or holds with the radio gear?

No data logging other than the ECU's which showed "failsafe" No one else that was there had a problem. I had about a month ago what I thought was a dumb thumb in a down line, but today makes me rethink the cause. I am thinking of grounding till i solve this.

Besides the WX is kind of poor this weekend.

man, somebody needs to figure this out.!!! if there is a problem with bran x - or brand - y.. ..man up .. the lost aircraft, is far more costly than any radio gear.. top notch pilots ,are reporting this more and more..i know one guy who had video of the reciever after the crash. all lights on.. sent it to brand -x.. they gave him a new plane..what does that tell you.. ?? ROSWELL..lol[X(]

Brand X or Brand Y or even brand Z.....if there is a problem we will never know. I really do not think and brand radio will come forward and say, ya our radio failed........This technology is still new and advancing everyday. with that, my thinking is that the truth will never be known. But then again, ic can very well be something we are over looking. can be something as easy as a battery acting up, such as one cell in a pack gone bad and under a spike or a heavy load, battery runs below voltage and receiver goes into failsafe.....


Mark

did anyone else have a DX7 "on" at the time?

FWIW we've had a lot of the AR7000 and AR9000 receivers show problems in our club (no other Spektrum models, just those two), some intermittent hits, some complete loss of control (without going to the preset failsafe) and the planes flew away. i was flying a guys plane today with an AR9000 in it, had been shooting touch and go's when on a go, i had no elevator control, when i pulled the stick back the elevator remained neutral, i returned the elevator to center and chopped the throttle when i did it went to full up elevator and jumped off the ground, then everything worked and i was able to sit it back down with no damage, extensive ground testing showed everything working just fine. all lights were solid.

How did you have your turbine setup in the radio, did you add ATV for failsafe... If you did, you had a lockout..

That said, there are two versions of 9000 in essence. the older ones didn't have fast re-acquisition. the only way to know is to cycle the power as in a brown out and see how long it takes to relink. If it takes less than 1 second, you have the latest software. If it takes 3 sec, send it in for updates. IF the light doesn't flash then, its the old Software..

with the 9000 make sure you are using both remotes, not one for a jet. cheap insurance.

The DX7 is a full range TX, no different than 9 or 12.. so its a receiver/install issue.

remember no system if bullet proof, but maybe that will help..

I think I had the only DX7 present. But shadowing is something that dual and differently located RX's was supposed to cure. Unless the remote RX's freq became occupied and the primary RX shadowed. At least this isn't the 70's during the CB craze when you had a lot of JA's with 1000 watt linear amps on their Radioshack CB swamping the 27 mhz band & overloading the front end of 72 mhz RX's.

We were on a military base at the time.

Roy

the reason Iask about other DX7's is because their chipset is/was from a certain providerand Iknow of one instance where the Globally Unique ID was not so unique

Don't get me wrong, I'm a JR guy with hundreds of flawless flights on DSM2, just sayin'

The more more I learn about the flaws of 2.4 ghz the less comfortable I become, and that applies to all makes. It is the hard over of the rudder that freaks me the most as I thought lock out was supposed to go to preset failsafe positions which is engine off and neutral elsewhere. This acted more like a interference swampout.

Have you set and tested the failsafe? If the failsafe works OK on the ground and does something else in the air it needs to go back to the service dept.

I must make a correction. My Rx is a AR7000, data capable.

Failsafe, I nudge all the surfaces off neutral and power up the Rx as a final check during assembly. Mostly to see if all the servos power up and move prior to installing the wing bolts.

Do you have first hand experience with other makes? If this was my plane, I would replace the tx / rx after something like that.

Arnaud
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That sounds like a wireing problem to me. Offten people tend to look to the TX/RX When in fact it is offton a bad connection on a wire somewhere. Turn everthing on and wiggle wires to see if you can replicate the problem

Dennis

I think there is a message here !!!!! You just can't make up stuff like that !!!!


because their chipset is/was from a certain provider and I know of one instance where the Globally Unique ID was not so unique

Give me a call Its Henry from Modellbau USA 305-519-2705. I can help

pffffffft....pfffffffft, you're so silly

Well after loosing another jet last month I fixed it by selling everything I owned that was spektrum. I am done with the problems. I had one plane that never went into fail safe just simply flew away.

All 2.4 is not created equal. Read, understand and apply what you think is the best in 2.4 technology. Hint, it is not DSSS! Being you were using the DSSS and on a military base, there is a high probability you did get outside interference.

http://www.cazitech.com/HomeRF%20WP%...terference.PDF

FCC regulations when designing wireless products.

http://www.codextr.com/understanding...eless-product/

Its interesting how many fliers have lockout problems and crashes and then have to try and figure out just what happened but have no real data with which to work, just guesswork and sometimes some, perhaps charred, wreckage. Thats now history if you have the right equipment.

Take a look at the Weatronic system with its dual adaptive FHSS system which records all the data you could want, in order to make a objective assessment, on the performance of the entire R/C installation including the strength and quality of the two RF links as well as the number of frames and failsafes, if any, which are generated in both Tx and rx. Everything is recorded via the downlink onto an SD card in the (crashproof, one would hopes ) transmitter for analysis and display on the Giga Control software. Its like a black box flight recorder, cockpit voice recorder and quick access recorder all rolled into one unit. Plus, of course, a whole range of highly useful other functions.

Take a look: www.weatronic.com you might do yourself a favour !

Regards,

David Gladwin.

I agree with Dave Weatronics is the best out there. We have been Weatronics dealers for a very long time and all I can say is that its the best thing going out there. The technology is far beyond its time, I use Weatronics on all my personal Jets as well as our UAV's for test flights prior to introducing full automation. if you visit Weatronics USA orwww.modellbauusa.comyou can see for your self why it is the best.

Looking at your pictures, I'm wondering where your problems are originating from.

Duralite regulators?

The crimp connectors you are using?

Install issues?

Batteries?

The pictures alone raises enough questions to answer before you look at Spektrum.

Just a thought...

Beave

An observation I have made over several months is that many of the alledged DSM2 Issues come out of the US. In the UK we seem to have far fewer. I am wondering if the fact that we transmit at 1/10th the signal strength has somthing to do with it.

Dennis

Countryboy, thank you for the links, quite an interesting read. Tends to give a lot creedance to FHSS as being superior to DSSM. My biggest reservation is that the FHSS is still arrogant enough to have only one antenna path. Given the huge chunks of RF shielding we have in the models, I would prefer multiple antennas with FHSS.

I am thinking seriously about the Airtronics 10 channel as it is the latest and hopefully has built upon the learning curves of the other brands.