Eagle Tree - What the heck is this???

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  • lectriglide
    Senior Member
    • Nov 2009
    • 538

    #1

    Eagle Tree - What the heck is this???

    Just downloaded some Eagle Tree data from my Geico and Fastech (just curious) runs a couple days ago. Setup on the Fastech is stock 1500 PB motor, X642, and Turnigy 90 esc with an additional Rubycon 35v 1000uf cap. Batteries were Turnigy 2s 5000 20c's x 2. Amp pull shown was expected, but what the heck is with the voltage spike? The batts weren't hot, checked out at 3.75 or so volts per cell. Didn't blow anything, can't really explain or really believe the data. Anyone have any suggestions?
    Attached Files
  • Himalaya
    Senior Member
    • Apr 2009
    • 251

    #2
    Unreasonable data. Probably faulty data caused by very strong EMI. Have you noticed a UFO passed by your pond?

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    • lectriglide
      Senior Member
      • Nov 2009
      • 538

      #3
      Originally posted by Himalaya
      Unreasonable data. Probably faulty data caused by very strong EMI. Have you noticed a UFO passed by your pond?
      Been wondering why the ducks just hover over the pond??

      Comment

      • Alexgar
        Fast Electric Addict!
        • Aug 2009
        • 3534

        #4
        maybe the prop went airboure and when it recaught and spike the amps

        Comment

        • ezhitz
          Senior Member
          • Aug 2009
          • 428

          #5
          Just a thought.If your running 4s why does your graph start a 20 volts that would seam like each 2S pack would of be around 10 volts each? Could be a faulty reading from the start or I read the graph wrong
          :canada

          Comment

          • lectriglide
            Senior Member
            • Nov 2009
            • 538

            #6
            Originally posted by ezhitz
            Just a thought.If your running 4s why does your graph start a 20 volts that would seam like each 2S pack would of be around 10 volts each? Could be a faulty reading from the start or I read the graph wrong
            The left scale is amps, the voltage is to the right.

            Comment

            • Himalaya
              Senior Member
              • Apr 2009
              • 251

              #7
              Have you used this Eagletree any more? did you find the same phenomenon again? You can try it in live mode with a battery connected. Then try gently knock it, shock it, bend it.

              I am guessing this might be a sign of a hidden hardware problem, possibly a bad solder joint on the lower resistor of the voltage devider network.

              Comment

              • keithbradley
                Fast Electric Addict!
                • Jul 2010
                • 3663

                #8
                Water can do the same thing. If it got wet at all, or your esc got wet, you can get some crazy readings.
                www.keithbradleyboats.com

                Comment

                • lectriglide
                  Senior Member
                  • Nov 2009
                  • 538

                  #9
                  Originally posted by Himalaya
                  Have you used this Eagletree any more? did you find the same phenomenon again? You can try it in live mode with a battery connected. Then try gently knock it, shock it, bend it.

                  I am guessing this might be a sign of a hidden hardware problem, possibly a bad solder joint on the lower resistor of the voltage devider network.
                  Here is a short run of MG right after I removed it from the Fastech. I installed a Medusa 36-60-2000 and wanted to check the amp draw since I had a T120 in it. Removed the T120 and went T180 when I saw the 115 amps it was pulling. GPS @ 44.8 with a detongued x442 . Everything looks OK to me on this log.
                  Attached Files

                  Comment

                  • lectriglide
                    Senior Member
                    • Nov 2009
                    • 538

                    #10
                    Originally posted by keithbradley
                    Water can do the same thing. If it got wet at all, or your esc got wet, you can get some crazy readings.
                    The stock esc is in the tupperware type container and had no water in it. The hull did have maybe a shot glass worth of water in it, but I attach the eagletree to a half cut pool noodle to keep it off the bottom of the hull. I guess there's a slight chance considering it was bouncing off the waves and ripples. It wasn't wet when I removed it but could be... At least you've given me an idea of what might have happened.

                    Comment

                    • tsenecal
                      Member
                      • Oct 2009
                      • 58

                      #11
                      my castle creations hydra 120 spiked like that right before it had a meltdown. I sent the data logger file to prove that nothing i did caused the ESC to die.

                      Comment

                      • oscarel
                        Fast Electric Addict!
                        • Dec 2009
                        • 2128

                        #12
                        I would suggest that you conformal coat it so you don't damage it.

                        Comment

                        • Gary
                          Fast Electric Addict!
                          • Jan 2009
                          • 1105

                          #13
                          All my Eagle Trees will have a glitch like that or something else now and then. Hell my boat showed a speed of 1,850mph one day !!!!!!!!!!! Everything else was fine.
                          PT-45, 109mph, finally gave up after last bad crash
                          H&M 1/8 Miss Bud 73 mph
                          Chris Craft 16 mph

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