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 120mm cs 12blade

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phil.D
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PostSubject: 120mm cs 12blade   Wed Jan 18, 2012 8:38 am

here u go sam for your euro.
http://www.x-flight.com.hk/index.php?sp=&p=6&cat2=35&cat1=10&cat0=4&id=154&cat1=10&cat0=4&new=&more=pro_new&lang=en
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theSupernova
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PostSubject: Re: 120mm cs 12blade   Wed Jan 18, 2012 9:39 am

Expensive when you're used to hobbyking Laughing
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phil.D
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PostSubject: Re: 120mm cs 12blade   Wed Jan 18, 2012 9:46 am

still not bad for a 120mm fan
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PostSubject: Re: 120mm cs 12blade   Wed Jan 18, 2012 12:32 pm

Interesting spec.

Description:-
-Outside Diameter: 128.2mm
-Rotor Diameter: 119.2mm blade
-Meterial: carbon fiber reinforced Nylon rotor
-Suitable motor 530KV-650KV for 12S
-Shaft adaptor to motor: 8mm
-Max RPM 28000RPM

I did a few quick calc's for 12S + 650Kv motor

12 x 4 (volts under load) = 48V
Motor Off load rpm, 48 x 650 = 31,200 rpm
Loaded rpm 70% (keeps it near peak efficiency) 31,000 x .7 = 21,840 rpm

21,840 rpm seems pretty slow for a ducted fan, so not for Fast Jets
Static Thrust should be good plenty of acceleration for Take off
Efficiency should also be better than the higher rpm (less blades) models.

All theory of course , I could be totally wrong Razz




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Paul L
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PostSubject: Re: 120mm cs 12blade   Wed Jan 18, 2012 12:52 pm

Here is one with an 800Kv motor on 12S
probably exceeds the Max rpm spec.

I like the way they all hide before starting it Wink
http://www.youtube.com/watch?feature=player_embedded&v=Yu6FMx6opKY

Also saw this
ChangeSun 90mm 12 pale su BaeHawk Fly Fly
http://www.youtube.com/watch?v=9D2ExahvOcA&feature=related

100A - 6S
12 blades ChangeSun 90mm
Typhoon 700-68 1680Kw
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theSupernova
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PostSubject: Re: 120mm cs 12blade   Wed Jan 18, 2012 7:21 pm

Mine runs at 34,000 rpm, that 8.8kw fan looks good, mine is "only" 5kw Laughing
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PostSubject: Re: 120mm cs 12blade   Thu Jan 19, 2012 12:32 am

Hi paul the flyfly hawk out performs my old hawk.
here is the cs 90mm running 10s 12s with a new hub made by usa,rc jets
i think i will use the 10s setup with 1000kv het.
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120mm cs 12blade
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