[NSRCA-discussion] E motor choice

[atwooddon at aol.com]

900 should do it but he could buy a motor in the 1000-1100 range and have  
some reserve by dropping the prop size a little or limiting the throttle 
high  end.  Then if Chris needs more, it's there.  Or, he could use a 4S  pack 
to start and could always move to a 5S if need be.
 
Don
 
 
In a message dated 1/12/2010 9:43:36 P.M. Pacific Standard Time,  
homeremodeling2003 at yahoo.com writes:

 
Hey Don. 
 
Thanks for the condolences on my plane. 
 
It's Chris Johnson from So Cal's plane. He's going with 5 cell  packs. The 
wattage you said is about right. I think 900 would  be really well actually 
but was asking here for backup, as it's  only going to be 4.25 lbs give or 
take. Do you think he would need  more than 200 watts per pound for 
Intermediate and Advanced?  Heck, my 14XL's (Well, 14XL now, RIP) barely give me that.
 
Thanks Don!

Chris  






 
____________________________________
 From: "atwooddon at aol.com"  <atwooddon at aol.com>
To:  nsrca-discussion at lists.nsrca.org
Sent: Tue, January 12, 2010 9:30:21  PM
Subject: Re:  [NSRCA-discussion] E motor choice

Probably needs 900-1100 watt range.  As far as Dualsky is concerned,  the 
XM4250CA or XM4260CA size motors would probably work.  These motors  will 
handle 11x6 to 15x8 props depending on battery cell count.  How much  prop 
clearance will he have?  What pack config, 4S, 5S, 6S?
 
I am not familiar with Hacker or Scorpion in this size motor tho I hear  
Scorpion motors have a great reputation.  There is a guy on RC Groups  flying 
the Helios 63e plane with a Scorpion 4020-12  on the equivalent of  a 5S 
Lipo and says it has way more power than he needs.  So, a 4S might  be about 
right.
 
"I'm new to electrics so I need some advice. I'm running a Scorpion  
4020-12 with
an Airboss 80 Elite ESC, APC 15x8e prop, on a Helios  63e  (60 sized) 
pattern ship
with 6S1P A123 batteries. The 4020-12 has way more  power than I need on 
this
airplane."
 
 
In a message dated 1/12/2010 8:39:31 P.M. Pacific Standard Time,  
homeremodeling2003 at yahoo.com writes:

 

I have a friend here in D7 that bought a Hyperion Helios F3A 63e at the  
AMA show. He called me asking what motor to use. He is thinking Hacker,  
Scorpion, and Dualsky. Any suggestions for him? It is supposed to weigh 4.25  lbs 
all up. I have some suggestions but thought I'd ask here for some more.  

Thanks!
 
Chris  








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