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  1. #1

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    Battery Sugestions?

    I have a Multiplex Twin Star II that I have modified with 2 35mm x 30mm x 1250kv Rimfire motors and I want a 4000mah to 5000mah 3s battery thats capable of handleing a total of around 600 watts. What battery would you sugest and what price range would it be in?

    Thanks for the help
    RC Lander F16d / Fokker DR-7 / SE 5a /Twinstar/ Easy Star / XC-1 / Axial AX10 / RS4 Rally / HL TigerI

  2. #2
    JAM MaxAmps's Avatar
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    RE: Battery Sugestions?

    Jason
    MaxAmps Marketing Manager/Tech Support
    Jason@maxamps.com
    www.maxamps.com

  3. #3

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    RE: Battery Sugestions?

    very nice!!!
    RC Lander F16d / Fokker DR-7 / SE 5a /Twinstar/ Easy Star / XC-1 / Axial AX10 / RS4 Rally / HL TigerI

  4. #4

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    RE: Battery Sugestions?

    Also I've noticed that when it's colder the battery I am using is even less responsive. At take-off my current battery was 52deg today and I wasnt able to get many RPM without the voltage of the battery dumping.
    RC Lander F16d / Fokker DR-7 / SE 5a /Twinstar/ Easy Star / XC-1 / Axial AX10 / RS4 Rally / HL TigerI

  5. #5
    JAM MaxAmps's Avatar
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    RE: Battery Sugestions?

    Li-po's drop capacity and at the same time C rate drops as well. You'll see this change start at 65 degrees and colder.

    Reduce run times and how hard you run the packs.

    Jason
    Jason
    MaxAmps Marketing Manager/Tech Support
    Jason@maxamps.com
    www.maxamps.com

  6. #6

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    RE: Battery Sugestions?

    Thanx so much for all your help. I also noted that i was only able to draw about 30A at this temp. Is it best to keep my batterys at 'room temp' say 75 F until flight time. I fly at a freinds house so this wouldnt be a problem. Also I was considering covering the NACA scoop for the fuse ubntil the temps came back up. Also is the C rate a batteries ability to pass current or only as rating at which it can safely pass a given current?
    RC Lander F16d / Fokker DR-7 / SE 5a /Twinstar/ Easy Star / XC-1 / Axial AX10 / RS4 Rally / HL TigerI

  7. #7
    JAM MaxAmps's Avatar
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    RE: Battery Sugestions?

    Yes you can start with a warm pack but more often the pack will cool to much during use. The C rate is just a rating and it's not a very well proven rating system at that. A 5000 20C pack if rated correctly should be able to support 100 amps constant with out pack damage but running a pack at that rate all the time will shorten it's life span. It's like running a NASCAR engine at high RPM's all day during a race. That engine is only good for that day then it's rebuild time. Always try to have more battery than what is needed. A little cushion is always best.


    Jason
    Jason
    MaxAmps Marketing Manager/Tech Support
    Jason@maxamps.com
    www.maxamps.com

  8. #8

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    RE: Battery Sugestions?

    Thanx for the help I think i'm on the right track and getting a good handle on elctric aircraft.
    RC Lander F16d / Fokker DR-7 / SE 5a /Twinstar/ Easy Star / XC-1 / Axial AX10 / RS4 Rally / HL TigerI


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