? what prop for Mean Machine?

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  • Lakefrontlivin
    Senior Member
    • Feb 2008
    • 176

    #16
    Ran the cat this afternoon at lunch break...47.6 mph with the 646 prop.
    Motor was a little hot after 2 minutes run time. ESC and Batteries were fine.. I'm going to try to make the water exit on the hull a little smaller diameter and try to slow the water down going through it..
    Will charge the bats tonight and see how much they take..
    Will try the 440/3 prop ASAP to see if there is a difference..
    Thanx,
    Tom H .

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    • Lakefrontlivin
      Senior Member
      • Feb 2008
      • 176

      #17
      Just finished charging the batteries and they took 1550mAh each. Is that good for a little over 2 minutes runtime ?
      Going to try the 440/3 prop next and GPS it... Hoping to get about the same speeds and a little cooler motor..
      Later, Tom H.

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      • ReddyWatts
        Fast Electric Addict!
        • Apr 2007
        • 1711

        #18
        To calculate your AVERAGE amps

        Battery mah used (times) 0.06 (divided by) run time = average motor load in amps

        1550Mah rating (times) 0.06 (divided by) 2.0 minutes = 46.5 amps

        Multiply (times) 2 for batteries in parallel = 93 average amps , not peak.

        Mah usage was about what should be expected from that runtime and setup.
        Last edited by ReddyWatts; 07-14-2008, 10:42 PM.
        ReddyWatts fleet photo
        M1 Supercat - Neu 1527 1Y, 8s / Mean Machine- Feigao 580, 8s, 120 HV esc
        Mean Machine - Feigao 540 14XL, 8s, 100 amp HV esc, X537/3

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        • Lakefrontlivin
          Senior Member
          • Feb 2008
          • 176

          #19
          Thank-you fro the response :)
          Just wanted to get an idea if everything was OK.
          I'm a little concerned with the ESC temp. as My temp gauge wasn't working..(batteries went dead )
          Tom H .

          Comment

          • ReddyWatts
            Fast Electric Addict!
            • Apr 2007
            • 1711

            #20
            I would definately reduce prop size.
            ReddyWatts fleet photo
            M1 Supercat - Neu 1527 1Y, 8s / Mean Machine- Feigao 580, 8s, 120 HV esc
            Mean Machine - Feigao 540 14XL, 8s, 100 amp HV esc, X537/3

            Comment

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