I understand Erik. I try to get the highest system efficiency I can.

Originally Posted by ex-racr

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)

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.