RE: Walkera #4 Fixed Pitch Helicopter Forum  
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    • All Forums >> RC Helicopters >> Electric RC Helis >> Walkera Helis - Dragonfly, etc.. >> RE: Walkera #4 Fixed Pitch Helicopter Forum
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    RE: Walkera #4 Fixed Pitch... - 3/24/2008 3:54:14 PM   
    dragon_no_fly


     

    Posts: 142
    Joined: 5/29/2005
    From: , USA
    Status: offline     		In case anyone was interested in my F/P belt conversion kit that I posted above,
    it is no longer available, it has been sold.

    (in reply to GTX SlotCar)
           Post #: 8426

    RE: Walkera #4 Fixed Pitch... - 3/25/2008 12:05:52 AM   
    HeliSmith



    Posts: 1522
    Joined: 1/25/2007
    From: Canyon Country, CA, USA
    Status: offline     		The reason why moving to a lipo can kill your motor faster is because of the elongated flight times. If you are throttle pumping on a lipo for 8 minutes you are going to overheat your motor. Just watch the heat this is the killer it isn't the lipos fault.

    _____________________________

    http://www.helismith.com

    (in reply to GTX SlotCar)
           Post #: 8427

    RE: Walkera #4 Fixed Pitch... - 3/25/2008 8:03:15 AM   
    mysteryguymlt


     

    Posts: 39
    Joined: 2/21/2008
    From: , MO, MALTA
    Status: offline     		hi, does a heat sink help in this situation please maybe there is more heat dissipation? kindly advice.

    (in reply to HeliSmith)
           Post #: 8428

    RE: Walkera #4 Fixed Pitc... - 3/25/2008 2:42:19 PM   
    Smitty09056


     

    Posts: 23
    Joined: 12/29/2007
    From: APO, AE, USA
    Status: offline     		I have bought the Mystery Li-poly 7.4V Battery with the E-sky charger. My question is can I use my power source from My original charger. It is an 18V 1A power source that plugs into an adapter for a Nimh battery.

    Thanks
    Smitty

    (in reply to mysteryguymlt)
           Post #: 8429

    RE: Walkera #4 Fixed Pitch... - 3/25/2008 4:17:34 PM   
    GTX SlotCar



    Posts: 2075
    Joined: 10/7/2005
    From: Gorham, ME, USA
    Status: offline
    quote:

    ORIGINAL: mysteryguymlt

    hi, does a heat sink help in this situation please maybe there is more heat dissipation? kindly advice.


    That's a good question. I've been using heat sinks on my main and tail motors forever. I also use high quality Arctic Silver heat sink compound for better heat dissipation. But... I've recently seen some temperature readings on a couple of a motors with and without using a heat sink, and the difference was less than 5° F for an aftermarket hot (or fast) motor, and only a couple degrees on a stock motor. I always assumed the heat sinks were doing some good, but I'm currently running without them to try it out and I'm not noticing any difference so far in the performance or lifespan of the motors. I guess the answer is, they can't hurt because they don't weigh much, but they probably don't help much, either. If you don't use a good heat sink compound, they probably make even less difference.


    _____________________________

    Gary
    SuperSkids® www.super-skids.com

    (in reply to mysteryguymlt)
           Post #: 8430

    RE: Walkera #4 Fixed Pitch... - 3/25/2008 4:54:12 PM   
    mysteryguymlt


     

    Posts: 39
    Joined: 2/21/2008
    From: , MO, MALTA
    Status: offline     		Thanks Gary.

    To be honest that was my impression also. my new motor gets very hot after 5 minutes hovering. i believe this is so because during hover you use more motor power then during normal flights/circuits.

    mysteryguymlt

    (in reply to GTX SlotCar)
           Post #: 8431

    RE: Walkera #4 Fixed Pitc... - 3/25/2008 6:57:18 PM   
    drobin


     

    Posts: 481
    Joined: 12/3/2005
    From: East Syracuse, NY, USA
    Status: offline     		I don't think it would be a good idea.My e-sky charger says 10-15v.I think I would stay with that.How about a 12v vehicle battery?That would work.

    (in reply to Smitty09056)
           Post #: 8432

    RE: Walkera #4 Fixed Pitc... - 3/25/2008 7:16:14 PM   
    HeliSmith



    Posts: 1522
    Joined: 1/25/2007
    From: Canyon Country, CA, USA
    Status: offline
    quote:

    ORIGINAL: Smitty09056

    I have bought the Mystery Li-poly 7.4V Battery with the E-sky charger. My question is can I use my power source from My original charger. It is an 18V 1A power source that plugs into an adapter for a Nimh battery.

    Thanks
    Smitty


    The E-Sky charger just has a plug port like the old style nimh charger right? What's it listing it's power source as?

    _____________________________

    http://www.helismith.com

    (in reply to Smitty09056)
           Post #: 8433

    RE: Walkera #4 Fixed Pitc... - 3/25/2008 8:14:02 PM   
    Smitty09056


     

    Posts: 23
    Joined: 12/29/2007
    From: APO, AE, USA
    Status: offline     		I have not recieved the charger yet, I hope to get it this week. Its the EK2-0851 charger. From what I can find it charges 7.4V and 11.1V li-poly batteries and I believe that the input is 13.5V but I am not sure. I have two power sources laying around the house. one as i decribed earlier and another that goes to 7.0V - 5A. will either of these work or should I purchase something else. Thanks

    Smitty

    (in reply to HeliSmith)
           Post #: 8434

    RE: Walkera #4 Fixed Pitch... - 3/25/2008 8:58:00 PM   
    dknovick



    Posts: 727
    Joined: 1/19/2005
    From: Albuquerque, NM, USA
    Status: offline
    quote:

    ORIGINAL: GTX SlotCar

    That's a good question. I've been using heat sinks on my main and tail motors forever. I also use high quality Arctic Silver heat sink compound for better heat dissipation. But... I've recently seen some temperature readings on a couple of a motors with and without using a heat sink, and the difference was less than 5° F for an aftermarket hot (or fast) motor, and only a couple degrees on a stock motor. I always assumed the heat sinks were doing some good, but I'm currently running without them to try it out and I'm not noticing any difference so far in the performance or lifespan of the motors. I guess the answer is, they can't hurt because they don't weigh much, but they probably don't help much, either. If you don't use a good heat sink compound, they probably make even less difference.


    Interesting... on the tail motor on my bird, without the heat sink, it's very hot to the touch after about 10min of hover. With the heat sink it's just warm (and that's without heat sink compound).


    _____________________________

    What goes up, most come down. How hard depends on you!

    (in reply to GTX SlotCar)
           Post #: 8435