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Old Apr 16, 2012, 04:12 PM
AKA Terry Till
ex-racr's Avatar
Alexandria, VA
Joined Apr 2002
1,468 Posts
I understand Erik. I try to get the highest system efficiency I can.
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Old Apr 16, 2012, 04:37 PM
3DHOG
jcdfrd's Avatar
USA, CA, Aromas
Joined Sep 2010
4,760 Posts
Quote:
Originally Posted by ex-racr View Post
I got this a few days ago and ran it up.
Details of the fan are here:
http://www.rcgroups.com/forums/showthread.php?t=1359237
The set up: 6S 2200 50C with Mega 16/25/2E (kv-2300, Rm .015)

Amps: 35
Watts: 760
Thrust: 48 ounces
Grams/Watt: 1.79
I suspect the mediocre G/W reading is because the ESC was losing sync with the motor at full throttle a little.
Never the less, it's in the same ball park as others.
One important thing to note is that the motor used has a higher kv than the ARC 28-47-2 used for most testing.
For my goals, this is a perfect match of motor and EDF unit, as my goal is to get about mid 30 amps static, without a thrust tube. That way I get 900-1000 watts installed.

Terry
well we just tested a mega 16/40/1.5rc motor in our TJ70 fan with the cs 10blade on 6s 4500 35c
and here is the result.......rock solid performance
Mega Snake (3 min 58 sec)
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Old Apr 16, 2012, 05:08 PM
AKA Terry Till
ex-racr's Avatar
Alexandria, VA
Joined Apr 2002
1,468 Posts
JC,
I've been following the CS 10 70mm thread. That's definitely a nice set up.
By the way my test was with the 4-bladed rotor; not the 10 bladed one
For those interested, I just ran up a couple installed set ups:

70mm Composite F-16
6S 2200
Cyclone 60amp ESC*
HET 2W-30 (2200KV)
RC Lander rotor in Change Sun Shroud.
Settled readings:
Volts: 21.9
Amps: 36.5
Watts:800

HET F-86
6S 2200 (same as above)
Castle Phoenix 80* with Hyperion cool SBEC
Mega 16/25/2E (2300KV)
RC Lander rotor in Change Sun Housing
Settled readings:
Volts: 21.42 (used same packs above and didn't "top off")
Amps: 42
Watts: 900

* I don't remember what timing the ESC's were on. These also include thrust tubes with an exit diameter of about 57mm.
-Though I didn't use Mini Fans, I think it's a pretty good comparison to a mini-fan, as the RC Lander rotors are similar.
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Last edited by ex-racr; Apr 16, 2012 at 05:16 PM.
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