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Thread: hacker


  1. #1

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    hacker

    Please help!!! I have a hacker c50 L inrunner brushless motor. I am putting it in a GP U can do SF. Running 5s but have no idea about the prop size. Any help on this would be greatly appreciated. Thanks guys

  2. #2

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    Is it a 10L, 13L, 14L, 15L... in other words exactly which model do you have and what is its Kv. What gearbox do you have on it?
    Dr Phil Millener, Chattanooga, TN

  3. #3

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    This is the c50 13L no gearbox. Kv 1874 operating amp 35amp. Peak amps 50. Peak watts 1200 resistance 0.0172ohms poles 2. Innrunner motor This is about all the info i have. Running on 5s thank you.

  4. #4

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    On 5s and limited to 35A -50A you'd need a tiny prop.

    MotoCalc suggests that 5x5 seems okay, 6x4 is a bit much:

    Motor: Hacker C50 13L; 1874rpm/V; 1.27A no-load; 0.0172 Ohms.
    Battery: Thunder Power TP4400 (G4 ProPower 45C) (45C); 5 cells; 4400mAh @ 3.7V; 0.002 Ohms/cell.
    Speed Control: Castle Creations Phoenix 60; 0.0012 Ohms; High rate.
    Drive System: Direct; 6x4 (Pconst=1.47; Tconst=1) direct drive.
    Airframe: Anything you want.
    Motor Amps = 54.1
    Motor Volts = 17.9
    Input (W) = 968.9
    Prop RPM = 31575
    Thrust (oz) = 73.3
    PSpd (mph) = 119.6

    For a 3D plane you will HAVE to have a gearbox so that you can fit perhaps an 11"-13" prop.

    There is a 3.7:1 gearbox option:

    Motor: Hacker C50 13L; 1874rpm/V; 1.27A no-load; 0.0172 Ohms.
    Battery: Thunder Power TP4400 (G4 ProPower 45C) (45C); 5 cells; 4400mAh @ 3.7V; 0.002 Ohms/cell.
    Speed Control: Castle Creations Phoenix 60; 0.0012 Ohms; High rate.
    Drive System: geared; 13x7 (Pconst=1.47; Tconst=1) geared 3.7:1 (Eff=80%).
    Airframe: Anything you want.
    Motor Amps = 50.7
    Motor Volts = 17.7
    Input (W) = 895.3
    Motor RPM = 31289
    Prop RPM = 8456
    Thrust (oz) = 123.7
    PSpd (mph) = 56.1
    Last edited by Dr Kiwi; 03-23-2014 at 08:19 AM.
    Dr Phil Millener, Chattanooga, TN

  5. #5

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    Hmmm. So not gonna be flying it on a .80 sized u can do sf without a gearbox? The info that i was able to obtain said it eould fly a 3D plane weighing 7-11lbs. So confused now.

  6. #6

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    If you go to 10S with a 6.7:1 gearbox Motocalc suggests it will get you this (under 50A but watts-in ends up well over the rated 1200W). I honestly have no clue as to whether it can cope with these numbers... but if you restrict it to 1200W.. I can't see doing 3D with anything much beyond an 8lb plane (150W/lb)

    Motor: Hacker C50 13L; 1874rpm/V; 1.27A no-load; 0.0172 Ohms.
    Battery: Thunder Power TP4400 (G4 ProPower 45C) (45C); 10 cells; 4400mAh @ 3.7V; 0.002 Ohms/cell.
    Speed Control: Castle Creations Phoenix 60; 0.0012 Ohms; High rate.
    Drive System: Direct; 14x8 (Pconst=1.47; Tconst=1) geared 6.7:1 (Eff=95%).
    Airframe: Anything you want.
    Motor Amps = 48.6
    Motor Volts = 36.0
    Input (W) = 1749.6 [it's a 300g motor... that's 6W/g!]
    Motor RPM = 65611
    Prop RPM = 9793
    Thrust (oz) = 232.4
    PSpd (mph) = 74.2

    Motor: Hacker C50 13L; 1874rpm/V; 1.27A no-load; 0.0172 Ohms.
    Battery: Thunder Power TP4400 (G4 ProPower 45C) (45C); 10 cells; 4400mAh @ 3.7V; 0.002 Ohms/cell.
    Speed Control: Castle Creations Phoenix 60; 0.0012 Ohms; High rate.
    Drive System: Direct; 13x7 (Pconst=1.47; Tconst=1) geared 6.7:1 (Eff=95%).
    Airframe: Anything you want.
    Motor Amps = 33.2
    Motor Volts = 36.3
    Input (W) = 1206.6
    Motor RPM = 66831
    Prop RPM = 9975
    Thrust (oz) = 172.1 (only 1:1 thrust to weight... you need ~1.4:1 to hover))
    PSpd (mph) = 66.1
    Last edited by Dr Kiwi; 03-23-2014 at 11:38 AM.
    Dr Phil Millener, Chattanooga, TN


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