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Two brown outs, loss of signal within two weeks, JR X9303 DSM2

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  • Two brown outs, loss of signal within two weeks, JR X9303 DSM2

    Few weeks ago acquired a Sukhoi (ver.1, green, electric of course), with a included Orange-rx DSM2, which bound quick to my JR X9303. It flew fine at the club, no issues, everything good. Then one specific day it momentarily loss signal at about 100 feet altitude and about the same in distance from me, dead, no control, pointed nose down and buried into the corn field, destroyed. Brought it back and immediately did a range test, (depressing rear button and walking 30 paces or 100 feet), passed, all servos working, fine.

    Took it home and into the parts bin until further notice when I get the energy to work on it. Yesterday took my Phoenix Sonic low wing, MK2, after flying it most of the week, and all of a sudden while bringing it back for landing after about 9 min of normal flying, airplane non responsive, stayed banking left at full speed, no elevator, no throttle back, I even told the guys, "I lost it", and definitely so it buried into the corn field, once again. This time about 100 feet altitude and maybe 300 feet away from the tx. I checked the 4-cell rx Spektrum 1100mah Spektrum battery before take off, and afterwards, a healthy 5.3v, and tx 10.5v. After the crash did a range check, passed, all good. On both occasions tx antenna in an angle as it is recommended.

    On the Sukhoi it had a Orange rx receiver, and in the Phoenix a Lemon-rx receiver, both 6-channel. Opened the tx to see, but no loose cables/connectors or cable chafing.

    I got a spare Lemon-rx DSM2 receiver with satellite, and will install that on a trainer, and upgrade the receiver battery to 5-cell to see if that eliminates the problem. I read for electric to use a spare rx battery instead of getting power from the lipo battery. Currently, only flying airplanes on PCM/PPM. Or I may ditch the 2.4ghz and stay with my Futaba T6XA PCM/PPM and buy the same crystals for all my airplanes, 6 model memory.

  • #2
    Originally posted by crankestein View Post
    Few weeks ago acquired a Sukhoi (ver.1, green, electric of course), with a included Orange-rx DSM2, which bound quick to my JR X9303. It flew fine at the club, no issues, everything good. Then one specific day it momentarily loss signal at about 100 feet altitude and about the same in distance from me, dead, no control, pointed nose down and buried into the corn field, destroyed. Brought it back and immediately did a range test, (depressing rear button and walking 30 paces or 100 feet), passed, all servos working, fine.

    Took it home and into the parts bin until further notice when I get the energy to work on it. Yesterday took my Phoenix Sonic low wing, MK2, after flying it most of the week, and all of a sudden while bringing it back for landing after about 9 min of normal flying, airplane non responsive, stayed banking left at full speed, no elevator, no throttle back, I even told the guys, "I lost it", and definitely so it buried into the corn field, once again. This time about 100 feet altitude and maybe 300 feet away from the tx. I checked the 4-cell rx Spektrum 1100mah Spektrum battery before take off, and afterwards, a healthy 5.3v, and tx 10.5v. After the crash did a range check, passed, all good. On both occasions tx antenna in an angle as it is recommended.

    On the Sukhoi it had a Orange rx receiver, and in the Phoenix a Lemon-rx receiver, both 6-channel. Opened the tx to see, but no loose cables/connectors or cable chafing.

    I got a spare Lemon-rx DSM2 receiver with satellite, and will install that on a trainer, and upgrade the receiver battery to 5-cell to see if that eliminates the problem. I read for electric to use a spare rx battery instead of getting power from the lipo battery. Currently, only flying airplanes on PCM/PPM. Or I may ditch the 2.4ghz and stay with my Futaba T6XA PCM/PPM and buy the same crystals for all my airplanes, 6 model memory.
    Cranke..........the most probable explanation for your unfortunate bites in the arse is that your Tx/Rx technology is of the DSM2 genre and that tech had it's big issues with exactly what you experienced and is exactly why the industry stepped up and went away from it to the DSMX tech. Early in my re-entry period to the hobby with 2.4Ghx radios I had a couple incidents with DSM2 going stupid. Been using DSMX for the past years and not a issue except for one which was June of 2016 @ NEFI and I lost a Seagull Skyraider (Cap'n Mike was witness) in what is now known as the NEFI Triangle because 3 other pilots loss their birds in the exactly same area/same weekend also..........there had to be a radio interference problem there but fortunately nothing this year in that same area.
    Warbird Charlie

    ScaleTech OV-10 Bronco; HSD A1 Skyraider(in rehab shop); FlightLine: F7F-2D, P-38 Allied Green, Sea Fury; FMS 1400: P-40B, P-51 Marie, F4U Olathe, F6F, T-28, P-40E, 1500 Razor, 1700 F4U and a Fox glider; Freewing: A-10 Artic Thunder(100+ parts to rise again), A-6, P-51 Iron Ass; VQ: P-39, JU-52; LX PBJ-1(B-25); Dynam: ME-262, FW-190, Waco, Catalina; Phoenix Spitfire; Maxford Antonov AN-2; Starmax L-4 Grasshopper; Eflite 1100 T-28 float; Tech1 P40;

    Comment


    • #3
      I agree, we all shuttered when approaching the Nefi triangle. Dang thing got my P-40 this year, thankfully all rebuilt and back in the air. The big boys in MotionRC are pushing the true diversity rx's now. Personally, I haven't tried one, but the technology is sound. Literally in my case. Back in the day, when I was a Rock Star I used a true diversity wireless system, it was great for no loss of signal or worse, picking up radio signals in the middle of a performance. Then same could be said for R/C, radio interference could have played a part in you unfortunate mishaps.
      Personally, I took CB's advice and have been using the 10 channel Lemons. At $30 per, you can't go wrong and they are DSMX and they come with a satellite antenna. Still, at some point I plane on trying the True Diversity system as well.

      Grossman56
      Team Gross!

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      • #4
        Here they are... the Phoenix is a cheap airplane, but man was it like a knife cutting through the air, track like on rails, and the Thunder Tiger .42 GP, extremely easy to tune, good power, never dead stick, very efficient on fuel consumption +10 minutes of hard flying. Suffered broken carb, the engine is discontinued so difficult to find spare.

        Currently looking at Futaba Txs, 8 to 14 channel. Not very familiar w all new technology, reading something about FASSTT or something like that which is better. Will check the motion rc equipment as well.

        Comment


        • #5
          I have modern Futaba, Spektrum and Tactic radios and use them all regularly but if I had to go with one it would be the new Spektrum DX8, it has very smooth gimbals, great battery life and has easy to use menu system. With so many planes coming with BNF (Bind and Fly) AS3X receivers the Spektrum is a must have to me.
          TiredIron Aviation
          Tired Iron Military Vehicles

          Comment


          • #6
            Originally posted by crankestein View Post
            Currently looking at Futaba Txs, 8 to 14 channel. Not very familiar w all new technology, reading something about FASSTT or something like that which is better. Will check the motion rc equipment as well.
            Futaba FASST tech is just another approach to the frequency hopping(FHSS) that Spektrum DSMX uses also.
            To say that one or the other is better is conjecture and is like getting into the Ford/GM/Chrysler opinion debate.
            Warbird Charlie

            ScaleTech OV-10 Bronco; HSD A1 Skyraider(in rehab shop); FlightLine: F7F-2D, P-38 Allied Green, Sea Fury; FMS 1400: P-40B, P-51 Marie, F4U Olathe, F6F, T-28, P-40E, 1500 Razor, 1700 F4U and a Fox glider; Freewing: A-10 Artic Thunder(100+ parts to rise again), A-6, P-51 Iron Ass; VQ: P-39, JU-52; LX PBJ-1(B-25); Dynam: ME-262, FW-190, Waco, Catalina; Phoenix Spitfire; Maxford Antonov AN-2; Starmax L-4 Grasshopper; Eflite 1100 T-28 float; Tech1 P40;

            Comment


            • #7
              Originally posted by crankestein View Post
              Here they are... the Phoenix is a cheap airplane, but man was it like a knife cutting through the air, track like on rails, and the Thunder Tiger .42 GP, extremely easy to tune, good power, never dead stick, very efficient on fuel consumption +10 minutes of hard flying. Suffered broken carb, the engine is discontinued so difficult to find spare.

              Currently looking at Futaba Txs, 8 to 14 channel. Not very familiar w all new technology, reading something about FASSTT or something like that which is better. Will check the motion rc equipment as well.
              What's powering the orange rx?

              Comment


              • #8
                *ok, so then its just marketing hype

                *40amp ESC, 3S 2200mah (balanced charged Hitec X2), had about 10 flights before the loss of signal happened. And it was evident, by itself as if it was possessed, pulled up, then shut down, dropped nose first and straight into the ground. Strange enough aileron and rudder was working, but not elevator. All linkages secured, no loose rods from servos to control surfaces. As if someone else was moving elevator. Once back to the car, all fine... and again tested at home.

                About the DSM2, I read from Horizon Hobby there was a recall on DSMx, but not on DSM2. The guy who had the orange rx, as I acquired it used from another club member friend, never had any signal issues. I dont think he sold me defective equipment knowing it can put at risk others or myself at the club. All in all, if am going to stay on this hobby might as well buy a good quality radio that will grow with me, and have them all in one device. Its just what a way to learn... it wasnt that much money after all, I just dont want to be crashing any more planes due to loss of signal.

                I did like a lot the features of the JR X9303, not sure if its rx or tx problem, just discard and start from scratch w new electronics.


                Comment


                • #9
                  Originally posted by crankestein View Post
                  *ok, so then its just marketing hype

                  *40amp ESC, 3S 2200mah (balanced charged Hitec X2), had about 10 flights before the loss of signal happened. And it was evident, by itself as if it was possessed, pulled up, then shut down, dropped nose first and straight into the ground. Strange enough aileron and rudder was working, but not elevator. All linkages secured, no loose rods from servos to control surfaces. As if someone else was moving elevator. Once back to the car, all fine... and again tested at home.

                  About the DSM2, I read from Horizon Hobby there was a recall on DSMx, but not on DSM2. The guy who had the orange rx, as I acquired it used from another club member friend, never had any signal issues. I dont think he sold me defective equipment knowing it can put at risk others or myself at the club. All in all, if am going to stay on this hobby might as well buy a good quality radio that will grow with me, and have them all in one device. Its just what a way to learn... it wasnt that much money after all, I just dont want to be crashing any more planes due to loss of signal.

                  I did like a lot the features of the JR X9303, not sure if its rx or tx problem, just discard and start from scratch w new electronics.

                  10 flights before loss of signal? What voltage was your rx pack at before the last flight?

                  Comment


                  • #10
                    Sukhoi power from the lipo, esc, 4.18v per cell at least.

                    Sonic, Spektrum receiver pack, 1100mah, 5.2/5.3v after the crash, checked with a Hobbico volt meter.

                    Did a few flight with the Sonic which has the TT GP .32, and in between flew another plane that is frequency, and on the meantime charged the receiver pack using one of those portable 12 volt chargers,Hobbico Accu-Cycle battery charger. The only difference is mine is not digital.
                    .
                    The receiver pack is 4 cell, I may go 5 cell. All in all, reading what others have said, its time to upgrade to newer technology.

                    Surveying the situation, no airplanes (two at this time), no engine, no radio... basically back to nothing, awesome.

                    At the beginning the issue was dead sticks, etc, but this ordeal of DSM2 and loss of signal is ridiculous.

                    Comment


                    • #11
                      The plan is to upgrade all electronics to a Futaba 10JA. Another friend of mine had a similar loss of signal on a Spektrum, w brand receivers, not (3rd party) Orange or Lemon receivers.

                      He was flying his airplane at the field, on its own rolled and stopped responding, straight to the ground and destroyed. He had it on dsmx programming if I recall well.

                      Thankfully I still have some airplanes on analog radios, which I can fly no problems. Maybe for smaller airplanes I'll have them on PPM which it is a old transmitter, but the T6XA is extremely reliable and glitch free.

                      Comment


                      • #12
                        I've been using Spektrum AR400/AR600's w/DM-9 2.4 module on my JR10X over 6yrs now & NEVER experienced a so-called "brownout" or issues with range or reliability. Every complaint with Spektrum Rx's is in all probability a Rx voltage issue & generally with wiring or connections........NOT THE FAULT OF THE Rx!!!!! The "Orange" Rx's have been proven to be quite unreliable & some "Lemons" had range issues, so please don't infer they are better than genuine Spektrum. I also still fly on 72Mhz with a couple of my older JR Tx's that have been flawless as always. My JR10X is absolutely the easiest computer radio to program with the touchscreen & gives me every flight command I will ever need for my flying parameters since I don't need any exotic flight attributes. I found Futaba programming to be a real nightmare, so be sure you want to go that route. Just MHO. Choose at your will & enjoy success or frustration.

                        Denny
                        *** \"A man\'s word is his honor....without honor there is nothing.\" ***
                        *** I have no hesitation to kill nor reservation to die for the Flag & Constitution of the USA. ***

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