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Electric-fly till it won't fly no more!!!

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  • Electric-fly till it won't fly no more!!!

    Hi Folks, tried out a new low volt Lipo system over the last few weeks, it’s taken a little while to really get used to it but today’s finally nailed it, I won’t be flying without one from now on


    This will let you fly your electric until it won't even hover, but it won't let any cell drop below your chosen voltage


    Most on here know that using a low volt alarm/light or a LVC on esc is not the best way, these monitor the overall voltage so whist the total voltage might be fine one cell could be heading south and taking a hit

    Using a timer seems to be the best way but it’s really not up to much, it is pretty much a guess as to what’s left in the tank, especially if like me you run different headspeeds at different times and don’t fly a set routine. I seem to like flying both the close up stuff and the big air type f3c moves it’s really hard to gauge what’s left so I end up running on the conservative side. Which means I’m not getting the best out of each cycle, and packs don’t cycle for ever…

    This won’t be everyone’s cup of tea, if you’re a real stick banger and like to abuse the packs going for broke near the end of the flight-don’t bother with this- it won’t let you.


    This Lipo protector monitors each cell individually, you set the voltage cut-off and go fly, I’ve set mine to 3.1volts, that seems low to me at first but it’s the loaded voltage and works a treat.

    Once a cell reaches 3.1 the headspeed is lowered, I’ve flown packs right down till they won’t even hover the heli- not something you usually do with 10s lipo packs
    Yet when charged every cell is 3.6 volts -resting voltage.


    It really works- plug in, go fly, land when blades stop spinning. All with the knowledge that no cell has been deep discharged.


    It’ll take a while to get real good info on how good this will be, I can see it really allowing more cycles on each pack, I will have to pick up some new packs and start a log. Right now all my packs range from 60 cycles right up to 200+


    The system really shows just how good the packs are, and the condition of any poor cells. I normally fly 6.5mins, chuck on a good pack and with this you won’t even notice for the first 5mins. After 5 mins any try any REAL hard collective/pitch manoeuvres and the head speed drops, you won’t ever crash but it’s noticeable. But I am really taking big amp drawers (Mikado/10s/scorpion 4035/jive -14 pitch climbouts) with normal flying it’s pretty much normal until to 6.5mins. Normally That’s it but with this you can fly on with a 10s revo 4800 pack it’ll go 8.30, the 3700 packs around 1 min more. With these fairly good packs the headspeed slowly drops over 20/30 seconds and you land.







    With well used packs with a dodgy cell or two, the system picks it up earlier, your get the headspeed drops earlier in the flight, it drops quick but also builds back up quick as soon as the voltage raises as the pitch is backed off. Because these packs have a dodgy cell once that gos low you don’t get as much time to land, it’s like a switch. On charging your’ll find the low cell at 3.6 and the rest way above.


    For any one flying top end multiple packs who wants them looked after this is great, you just can’t abuse any cell-





    BTW - it's a Schulze lipodimatic14- you just plug the balance tap in as well




    Mark.
    Mark.



    Mikado~Kontronik~Scorpion~Revo~V-Stabi

  • #2
    Sorry for the long post- got a tad carried away...





    Mark.
    Mark.



    Mikado~Kontronik~Scorpion~Revo~V-Stabi

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    • #3
      So go on, what sort of costs are involved?
      sigpicX2

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      • #4
        I used to use the FMA Balancepro Discharge protection Module which did exactly the same thing,it was Ok but i prefer sticking to the timer.

        I used it on a 6s T Rex 600.

        To add it also reduced the power when it detected a cell voltage dropping,unfortunately on one occasion the Revo Lipo had a fault on one of the balance tap leads so it read no voltage from one cell even though it was OK.
        Last edited by ChrisB; 24-01-2009, 09:57 PM.

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        • #5
          Great info thanks mate.

          The ESC on my 500 starts to complain once the voltage drops to the 3.75-80V mark.

          It does a good job as right up to that point there's plenty of power left on tap, then it starts to bow out but offers plenty of time to get her on the deck.

          If the price is right I can see it catching on, till then it's still the stop watch for me.
          sigpicWayne AKA OB1

          Inherit the Wind - Wilton Felder 1980, Smooth Jazz-Funkin' & Flyin' in the Fens

          Blade CX2 / Trex 250SE / Trex 450 SE V1 / Trex 500esp / Trex 600 Nitro Pro / Raptor 30 V2 / DX6i / DX7 / Phoenix / Ripmax twin Dock PSU / Cellpro 10S & 4S / Imax B6 x2.
          Prankster Nitro / Delta Push Prop / Swift 2 Flying Wing x3 / Swift 2 (Night Flyer LED Lit) / Swift Maxi Wing / Squall 4S/ HZ Ember / Wot 4. (all 2.4ghz)
          Plus 3 Eddie Gold Stars, yay!
          Trex 450XL - Destroyed due to complete power failure at height.

          Joint second best sites on the Web:-
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          • #6
            yep- fma did try something but it didn't quite work out , I think they've dropped it now you need it to cut in and out rather than just shut down.

            Andy- it's pretty cheap, I think the 6s is £25 and the top one is the 14 cell ( as pictured) was £40.
            Mark.



            Mikado~Kontronik~Scorpion~Revo~V-Stabi

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            • #7
              Cambs flyer, don't forget your esc is looking at the overall voltage, once packs start to age the voltages really can differ- and once a cell go's south, it can happen pretty quick. I've had old packs go from ok to ******* in 10 cycles.

              As I've said this may well be more suited to 8s/10s packs- darn cheap insurance and what about flightime, an extra minute or more per flight- 100 cycles = an hour and more airbourne. OK, your not going to be piro-flipping or doing sustained tic tocs but it'll do backwards circuits/ inverted figure of eights etc




              Mark.
              Mark.



              Mikado~Kontronik~Scorpion~Revo~V-Stabi

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              • #8
                MRB good review , ill have to look around see who has them , btw i got the esc in the end i ordered a jazz but thay sent a jive 80 HV instead few quid more but its a good controller. jim

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