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Old Dec 12, 2011, 10:39 AM
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Heli Copter's Avatar
United States, CA, Watsonville
Joined Apr 2009
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Some new numbers!

Hey Guys,

In a 5S stock ParkZone Habu I fried the stock motor on takeoff with the CS 10/70. When it gave up I was running 134 Amps, 2300 watts and 44,400 rpm's.
The sound was great for 30 seconds, sorry I don't have any video. Figuring the kv was too high, I went to a 2700kv Ammo inrunner. Here is the video of that attempt with the numbers in the video description. It sounded great but slow!

Change Sun 70mm with 2700kv Ammo inrunner. (2 min 38 sec)
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Old Dec 12, 2011, 10:57 AM
Registered User
United States, TX, Grand Prairie
Joined Nov 2005
5,598 Posts
Quote:
Originally Posted by Heli Copter View Post
Hey Guys,

In a 5S stock ParkZone Habu I fried the stock motor on takeoff with the CS 10/70. When it gave up I was running 134 Amps, 2300 watts and 44,400 rpm's.
The sound was great for 30 seconds, sorry I don't have any video. Figuring the kv was too high, I went to a 2700kv Ammo inrunner. Here is the video of that attempt with the numbers in the video description. It sounded great but slow!

http://www.youtube.com/watch?v=_97ZfNo-rQ0
Was this 4s or 5s?

Also, what was the thrust figures with the ammo motor?
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Old Dec 12, 2011, 11:04 AM
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USA, CA, Aromas
Joined Sep 2010
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Nick
do you remember the rpm and amp draw with the 2700kv ammo motor
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Old Dec 12, 2011, 11:09 AM
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USA, CA, Aromas
Joined Sep 2010
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Quote:
Originally Posted by erh7771 View Post
Was this 4s or 5s?

Also, what was the thrust figures with the ammo motor?
erh
it was 5s and did you see the take off? their was no thrust it was pitiful the thing barely took off. I will let nick come in with the rpm,amp,watts but if my memory serves me I think it was 39k,1800watts,85amps
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Old Dec 12, 2011, 11:13 AM
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USA, CA, Aromas
Joined Sep 2010
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ok my bad, it helps to be able to read LOL
Quote:
numbers in the video description. It sounded great but slow!
5S nanotech 4500mah, 35-70C. 85 Amps, 1450 watts, 39,000rpms.

so I got two out of three
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Old Dec 12, 2011, 11:16 AM
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United States, TX, Grand Prairie
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Quote:
Originally Posted by jcdfrd View Post
erh
it was 5s and did you see the take off? their was no thrust it was pitiful the thing barely took off. I will let nick come in with the rpm,amp,watts but if my memory serves me I think it was 39k,1800watts,85amps
I want thrust numbers, I haven't dealt with AMMO motors but the can size is 45mm IIRC on the 2700kv. An ARC is 58mm long for the 3200kv, can size makes a difference in whether or not the motor is producing heat or RPMs at certain wattages.

I get 52oz of thrust at 67 amps on 4s with this fan using a 2839 3000kv HK motor.
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Old Dec 12, 2011, 11:40 AM
RC addict
Melbourne
Joined Sep 2004
69 Posts
Hey guys, Anyone tried a Het 2W-20 setup with this fan? I tried one in a Dynam Meteor, Stock fan with CS blades. Motor got hot, melted the motor mount a bit which caused the blades to rub a hole in the side of the fan. This added resistance probably killed the motor.
Using the Stock motor from the Dynam Meteor with the CS fan and it works really well now.
However, i would like to try this on the HET 2w-20 motor in a HET fan housing but with the Change Sun blades. Anyone can give me a heads up on what to expect?
Thanks guys.
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Old Dec 12, 2011, 11:44 AM
1.21 Gigawatts!
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Irvine, CA, USA
Joined Oct 2000
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2w-20 is probably good for 3S with this fan. 4s will be too hot.
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Old Dec 12, 2011, 11:45 AM
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jcdfrd's Avatar
USA, CA, Aromas
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Quote:
Originally Posted by erh7771 View Post
I want thrust numbers, I haven't dealt with AMMO motors but the can size is 45mm IIRC on the 2700kv. An ARC is 58mm long for the 3200kv, can size makes a difference in whether or not the motor is producing heat or RPMs at certain wattages.

I get 52oz of thrust at 67 amps on 4s with this fan using a 2839 3000kv HK motor.
sorry no thrust numbers, just what you see on the video take off. about 50% less than stock setup on same power 5s
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Old Dec 12, 2011, 11:49 AM
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Fairborn, OH
Joined Nov 2009
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Quote:
Originally Posted by rfodor View Post
The ARC is 3180 KV, I think a 2900 - 3000 kv motor on 4S (with a battery that can supply all the power the motor wants) would be about right you should get about 35000 RPM at around 80 -90 amps. Around 1300 watts. Don't even think about 5S with the 2900 kv motor in this fan. In a SAPAC, WEMO, HET fan 5S would be fine but not the CS10.
Thanks for the input. I'll put this setup together and give it a try.
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Old Dec 12, 2011, 11:50 AM
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USA, NY, Queens
Joined Dec 2006
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The JS-1400 can run a 5cells lipo on a HET 6904...


Anybody running the JS-1400 on this fan?

red
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Old Dec 12, 2011, 11:59 AM
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Fairborn, OH
Joined Nov 2009
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Quote:
Originally Posted by flazo View Post
The JS-1400 can run a 5cells lipo on a HET 6904...


Anybody running the JS-1400 on this fan?

red
But that's a 4000KV motor, right? Way too hot for this fan.
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Old Dec 12, 2011, 12:35 PM
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capt soap's Avatar
dallas tx
Joined Jun 2003
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Im starting to wonder is this fan worth it???? Sounds great, but smoke, and poor performance???
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Old Dec 12, 2011, 12:51 PM
Don't Move I've Dropped My Nut
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United States, AL, Huntsville
Joined Feb 2009
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[QUOTE=Heli Copter;20118851]Hey Guys,

In a 5S stock ParkZone Habu I fried the stock motor on takeoff with the CS 10/70. When it gave up I was running 134 Amps, 2300 watts and 44,400 rpm's.
The sound was great for 30 seconds, sorry I don't have any video. Figuring the kv was too high, I went to a 2700kv Ammo inrunner. Here is the video of that attempt with the numbers in the video description. It sounded great but slow!

At those high readings, it's no wonder the motor burnt up!!! That motor (unless it is the BL-32) is rated at 55amps/850watts.
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Old Dec 12, 2011, 12:53 PM
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Fairborn, OH
Joined Nov 2009
544 Posts
[Im starting to wonder is this fan worth it???? Sounds great, but smoke, and poor performance???]

That's probably too much of a generalization. I think guys are just trying to find the "sweet" spot for a 4S, 5S, etc. set-up. We've never had to deal with a 10 blade 70mm before. Extreme RC is getting some good results with their modified version.
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Last edited by alexandermh; Dec 12, 2011 at 12:54 PM. Reason: Added quote.
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