[NSRCA-discussion] Electric Pattern

[Mike Hester]

For pattern a good rule of thumb is 150 watts per pound. A better rule of thumb is closer to 200 watts per pound. 

It takes a lot of experimentation to find the right combination, sometimes what looks great on paper doesn't work all that well in application. 

What you're looking for is more than you "need". this way when you push it in bad conditions, you don't burn it all up.

I have found some very cheap chinese motors that work as good or better than what we can get over here from the more established companies. Some combinations are really cool, especially in the 110 range. You're looking for around 1600-2000 watts, motor weight about 500 grams or less, about 250-300kv, and using 8s packs. Lethal =) And fairly inexpensive.

Then you just have to figure out whether you want to turn a large prop slow or a small prop fast. Somewhere in there, you hit the magic for the particular plane. 

But if you want "established", the E flight power 110 is ok, and the Axi 4130-20 works. Don't get the -16 turn axi as it won't handle 8 cells and won't deliver quite enough power.

-Mike
  ----- Original Message ----- 
  From: John Ferrell 
  To: NSRCA Mailing List 
  Sent: Wednesday, March 05, 2008 12:51 PM
  Subject: Re: [NSRCA-discussion] Electric Pattern


  I am not picking on Incheon here, the questions are to all:

  I too, am struggling to understand how to select appropriate power for a given airplane.

  The specs for the ElectriFly 110 call for up to a 15 pound airplane, It sounds like a lot of Watts for an 8 pounder.
  A Phoenix 80 controller also sounds like a lot of over kill. Can I assume that the electrics can just be run at a lower power setting and less batteries without overburdening the airframe?

  Which AXI would be interchangeable with the Electrifly 110? 

  Would the Dualsky XM5060CA be an equivalent? The advertising indicates 1:1 correspondence to a YS 110.

  Is the following comment True or False?
  It seems that an over spec motor and speed control are only a financial mistake. Flying at reduced power levels is not a technical flaw and in fact may provide a more reliable power setup.

  John Ferrell    W8CCW
   
  "All that is necessary for the triumph of evil is for good men to do nothing." -- Edmund Burke
  http://DixieNC.US

    ----- Original Message ----- 
    From: Ihncheol Park 
    To: NSRCA Mailing List 
    Sent: Monday, March 03, 2008 8:57 PM
    Subject: Re: [NSRCA-discussion] Electric Pattern


    Jay,

    Lots of power setups available.  It all depends on how much you want to put in.

    Hacker A50,  E-Flite 110, Axi,  BPHobbies,  Welgard, Dualsky, Neu, Hyperion, etc.

    For a reasonable price, E-Flite seems to be a good choice with Castle Phx 80 or E-Flite 60 may also work.  I went with E-Flite 110 for Inspire 90 because I couldn't install the YS110 on it.  
    Hacker, Axi are very good, but I was told these make a little noise during the run.  Not sure what that noise is.  
    Hyperion runs really good too.
    I can look up if I have spec on Focus 110.

    Ihncheol


     




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