[NSRCA-discussion] Electric Pattern

Wed Mar 5 09:51:02 AKST 2008

You need more w/lb the larger you get, 150 on a foamy is a rocket and dog on a 2m.  

For an 8 lb model you should be in the 1800W range to get through sequences like Masters without running into power problems.  

It also depends on which prop you run, if you use a 22" diameter prop you don't need as many watts to get the same vertical as someone running a 20" prop.  This is one reason you see the guys with the outrunner setups running 20x15's spitting out 2800-3000W and guys with the Hackers and 22" props spitting out 2300W.

Chad

----- Original Message -----
From: krishlan fitzsimmons <homeremodeling2003 at yahoo.com>
Date: Wednesday, March 5, 2008 11:43 am
Subject: Re: [NSRCA-discussion] Electric Pattern
To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>

> Hey Mike.. 
>    
>   Good rule of thumb, I like the 200.. lol.. 
>    
>   As for the 4130, it's more for 60 size planes, such as 
> the Fliton Inspire 60, works awesome in this plane, but it's 
> light also.. From the Axi website it's listed as suitable 
> for  .54-.60 -2stroke .70-.80 -4stroke. Although it may 
> work as you save weight with the 8s packs, I think it will leave 
> an undesirable power level. Especially in the wind.. The 120 
> size are 5320's.. From Axi's website its listed as  .80-
> 1.08 -2stroke .91-1.2 -4stroke. And if you can afford it, I 
> would recommend 10s to start, therefore if and when a 2m plane 
> was bought, you don't have to invest a bunch more on packs, 
> while alot of 8s packs go to waste.. 
>   I'm not saying you're wrong Mike as I know you have 
> probably done alot of testing in your planes, just mentioning it 
> in case you hadn't tried the 4130 vs the 5320.. That's all. I 
> have had both.. 
>   I had a showtime which is a 90 size plane with a 5320 
> with 10s 3700's and it had just enough power for 3d, but was 
> adequate for pattern. Granted the showtime was a brick.. lol I 
> think it was 11 lbs.. lol . And I had the Inspire which was very 
> light with the 4130.. 
>    
>   Chris
>    
>    
>   
> 
> Mike Hester <kerlock at comcast.net> wrote:
>     DIV {   MARGIN: 0px  
> }        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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> 
> Chris 
>    
>    
>    
> 
>        
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