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Old Oct 06, 2012, 09:44 AM
Low rates are for wimps
bwoollia's Avatar
United States, CO, Colorado Springs
Joined May 2008
3,262 Posts
Quote:
Originally Posted by WhalleyB0Y View Post
How about the 2950kv motor paired with CS10 fan, 110A ZTW esc running on 5s? Some people have even said this motor would be good on 5s and others are happy running it on 4s. Anyone have comments on this?
It might work well on 4S or 5S on the CS fan, there is a good thread here which will give you an idea of the kv / cell count combinations.
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Old Oct 06, 2012, 01:28 PM
My project: FAIREY DELTA 1
Erik v. Schaik's Avatar
Uden Volkel, Netherlands
Joined Dec 2003
4,974 Posts
This motor is 250% heavier as the mega 16/15/3 which performs fine at 4s. I wouldn't be suprised if 6s or more would work. if you run at 4s you will have a major weight penalty in your drive system!
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Old Oct 06, 2012, 01:39 PM
efflux RC's Avatar
United States, CA, Santa Clarita
Joined Aug 2009
8,449 Posts
It's for a 6s setup in a 3-6 bladed fan. The added weight is a benefit in it's mass and ability to shed heat.
Yes, your an "energy star" EDF'r eric, but some folks want 1900+w. (with 5-6+ lbs thrust)
The 61.5 mm long MEGAs and the HET 1W-40's are being used there as well.

Long can, low kv motors are being used by the CS guys. so the rotor doesn't burn up the motor. at lower power levels (<1300w)
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Old Oct 06, 2012, 02:31 PM
Claus at Area 52
clausxpf's Avatar
copenhagen Denmark
Joined May 2002
2,528 Posts
why do you think we offer different motors?
2900/ 2950 kv are for 6 S
3200 kv are for 5 S
and the lower S the more amps for the same thrust, and the less efficiency due to heat loss.
Claus
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Old Oct 10, 2012, 07:19 PM
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WhalleyB0Y's Avatar
Canada, BC, Surrey
Joined Jul 2011
884 Posts
I put my 2950kv in my H2 with a Changesun 10 blade 70mm and here is some numbers I got with the 4s and 5s packs I had.

5s 3300mAh 30C

15.59vm
106.9ap
1787wp
3min fly time


4s 3500mAh 35C

13.11vm
82.96ap
1130wp
2.52 min duration

Auw of the Habu with various pack sizes

5s 2200 1.6kg / 3lb9oz
5s 3300 1.8kg / 3lb13oz
* 22grams needed to balance
4s 3500 1.63kg / 3lb9oz
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Old Oct 11, 2012, 06:58 AM
AMA 983978
United States, FL, Jacksonville
Joined Sep 2011
175 Posts
Got my 2950kv installed in my H2 last night, WeMoTec Minifan Pro, 6s 3300 40C. At WOT:
85.1a
1850 watts
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Old Oct 12, 2012, 06:45 AM
Registered User
United States, TX, Grand Prairie
Joined Nov 2005
5,678 Posts
Quote:
Originally Posted by MikePS View Post
Got my 2950kv installed in my H2 last night, WeMoTec Minifan Pro, 6s 3300 40C. At WOT:
85.1a
1850 watts
I got a little over 5.5lbs of thrust with this setup, this will take 65c packs all day and not break a sweat
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Old Oct 12, 2012, 08:11 AM
Aka: Tom Jenkins
ApexAero's Avatar
Palm Beach County, Fl.
Joined Aug 2008
4,401 Posts
Here's a little fat to chew on guys! V 4200, 5s 4200 65c, Ice100, 7.5lb thrust, lander shroud/wemo pro 70mm impeller
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Old Oct 12, 2012, 01:51 PM
Low rates are for wimps
bwoollia's Avatar
United States, CO, Colorado Springs
Joined May 2008
3,262 Posts
Quote:
Originally Posted by ApexAero View Post
Here's a little fat to chew on guys! V 4200, 5s 4200 65c, Ice100, 7.5lb thrust, lander shroud/wemo pro 70mm impeller


199A! Wow! Were you able to check the motor temp after the fact? Was the Cool 42 in fact still cool?
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Old Oct 12, 2012, 03:16 PM
Aka: Tom Jenkins
ApexAero's Avatar
Palm Beach County, Fl.
Joined Aug 2008
4,401 Posts
Quote:
Was the Cool 42 in fact still cool?
That isn't the half of it! Did you see the watts? I never have trusted CC's data recording to be all that accurate. The motor lasted in the setup untill I put it in a eflite f-86, maiden takeoff and 1/4 lap then poof! Went around the field one and a half laps to slow down to land though! Thats with the stock gear hanging!
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Old Oct 12, 2012, 03:24 PM
Low rates are for wimps
bwoollia's Avatar
United States, CO, Colorado Springs
Joined May 2008
3,262 Posts
Quote:
Originally Posted by ApexAero View Post
I never have trusted CC's data recording to be all that accurate.
Agreed. I'm gonna guess +/-20%, and Castle doesn't even guarantee that it's supposed to be accurate anyways. I find that they generally over-read.

That being said, even if you're 25% over, that's still over 150A!
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Old Oct 12, 2012, 03:26 PM
AMA 983978
United States, FL, Jacksonville
Joined Sep 2011
175 Posts
interesting to be sure! my readings were with the eflight power meter in line..
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Old Oct 13, 2012, 12:25 PM
Registered User
United States, TX, Grand Prairie
Joined Nov 2005
5,678 Posts
~7lbs of thrust at 140 amps with 2950kv motor from EDFHobbies

CS 10 blade rotor, EDFHobbies 2950kv motor, 6s, 3000watts 7lbs of thrust (2 min 17 sec)


Motor wasn't properly heat sunk to shroud or can sink...

With proper heat sink magnets will like watts way more
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Last edited by erh7771; Oct 13, 2012 at 12:33 PM.
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Old Oct 13, 2012, 11:05 PM
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capt soap's Avatar
dallas tx
Joined Jun 2003
2,850 Posts
What jet you putting this in? 777
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Old Oct 13, 2012, 11:06 PM
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capt soap's Avatar
dallas tx
Joined Jun 2003
2,850 Posts
Now try it on 5s, maybe a 65c pack ?
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