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Old Aug 23, 2012, 03:31 PM
DELTAS RULE
corsair nut's Avatar
tehachapi, CA
Joined Jan 2006
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its a awesome idea for sure. but it looks like the jetfan blades were copied for thier low pitch blades. the high pitch blades look like a original design.
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Old Aug 23, 2012, 03:33 PM
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PikeStaff's Avatar
United States, PA, Doylestown
Joined Sep 2010
2,840 Posts
Quote:
Originally Posted by erh7771 View Post
It's 18 blades,

Spin 10 blades at 150k rpm max (for turbine) or spin 18 blades at 70k rpm (or close) and the white noise coming off the blades is loud and very realistic.

? - Hah? Can't wait to see amp draw on this. Also can't wait to see motor selections here.
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Old Aug 23, 2012, 03:38 PM
world's slowest builder
Air-Jon's Avatar
CA
Joined Oct 2006
837 Posts
Oh...I see what you mean Corsair nut. I just noticed the different pitch blades. I see the ones that looks JetFan style...and the other blades look Arson style. Just a coincidence right.
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Old Aug 23, 2012, 03:44 PM
world's slowest builder
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CA
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It will be a long month to wait to get one of these!
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Old Aug 23, 2012, 03:49 PM
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capt soap's Avatar
dallas tx
Joined Jun 2003
2,922 Posts
these are not a arson copy. ive seen them in a flying buddy's jet. he' had it a while. When i get out off the hospital, i can post some pic's. Lee
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Old Aug 23, 2012, 04:05 PM
Should've, Would've, Could've
v8truckin's Avatar
United States, CA
Joined Dec 2010
6,788 Posts
Lee,

Heres the Arson

http://www.rcgroups.com/forums/showthread.php?t=1715858

Hope u get better
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Old Aug 23, 2012, 04:22 PM
Do it Right, the first time!
CoolerByTheLake's Avatar
United States, MN, Hermantown
Joined Dec 2008
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Here's some possible options, depending whats required.
http://fightercatracing.com/index.ph...chk=1&Itemid=1

I'v been eyeing up the 4092, listed Kv's are too high for what I need, but e-mailed them for special order on1250Kv. It would be a monster on 12s! Just have to wait and see.
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Old Aug 23, 2012, 09:10 PM
Not enough hours in the day
Slaanesh's Avatar
Melbourne
Joined Feb 2009
2,429 Posts
Very nice... X-flight and RC-Castle getting these first? Hobbyking?
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Old Aug 23, 2012, 09:25 PM
world's slowest builder
Air-Jon's Avatar
CA
Joined Oct 2006
837 Posts
Will there be an 8mm shaft option?
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Old Aug 23, 2012, 09:25 PM
Ming's Avatar
Hong Kong
Joined Jun 2002
4,663 Posts
Quote:
these are not a arson copy. ive seen them in a flying buddy's jet. he' had it a while. When i get out off the hospital, i can post some pic's. Lee
Tooling was done few months ago, couple time of adjustment and fine trim on tooling. We also send few samples to tester for testing couple time ago, but we ask them don't to disclose until new product announcement. I think everyone have similar idea on their mind, right? but someone make it happen faster than other, that simple.

Ming Lou
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Old Aug 23, 2012, 09:59 PM
Registered User
United States, GA, Alpharetta
Joined Feb 2009
404 Posts
Quote:
Originally Posted by erh7771 View Post
It's 18 blades,

I have it in my Fly Fly F100...

Don't want to let numbers out yet...

I ran mine with rounded intake lip and the white noise is as loud as I've heard out of any fan even without an intake lip.

Spin 10 blades at 150k rpm max (for turbine) or spin 18 blades at 70k rpm (or close) and the white noise coming off the blades is loud and very realistic.

With a very balanced rotor the turbine high frequency like whistle can be heard at lower RPMs also so when you're taxing the sound is VERY VERY nice depending on motor of course and how well balanced the rotor is.
What motor is going to turn that 10 blade rotor at 150,000 RPM????? and how many watts to do it??? And for that matter, what motor is going to turn an 18 blade at 70,0000 RPM and at what watts??? And while I'm questioning it why won't this one explode like my 12 blade CS fan???
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Old Aug 23, 2012, 10:05 PM
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United States, GA, Alpharetta
Joined Feb 2009
404 Posts
Quote:
Originally Posted by Ming View Post
Dear All EDF Fellows

After almost 18 months of time, the new fan molding finally ready to go mass production. That is a long road from rough idea to product launch to the market, we forgot how many difficulties need to overcome in the past 18 months. We will accept pre-order very very soon!

Brand: Changesun
Product : CS Smart Fan
Inside diameter: 91mm
Rotor diameter: 89mm
Meterial: Fibre Reinforced Nylon Rotor
Motor: Depend on blade combination
Loading: Depend on blade combination
Number of battery cell: Depend on blade combination
Shaft adaptor: 5mm
Thrust: 2.45g

*Multi- blade combination selection*
*Two group of difference pitch of blade to use*
*This is the total solution of 90mm EDF*
*Optional to use aluminum duct*
*Patent Pending*


Ming Lou
Ming Lou, are you aware that Change Sun's reputation has been badly damaged by the exploding 12 blade 90mm fans at as little as 2KW, 30,000 RPM and you expect this 18 blade to turn 70,000 RPM? Why is this one able to turn over twice the RPM and why cant the blades for the 12 blade be made out of the same material???
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Old Aug 23, 2012, 11:09 PM
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Quote:
Originally Posted by rfodor View Post
Ming Lou, are you aware that Change Sun's reputation has been badly damaged by the exploding 12 blade 90mm fans at as little as 2KW, 30,000 RPM and you expect this 18 blade to turn 70,000 RPM? Why is this one able to turn over twice the RPM and why cant the blades for the 12 blade be made out of the same material???
I want an answer on this too...
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Old Aug 23, 2012, 11:12 PM
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we definetely want an 8mm adaptor and some good insurance that the blades will hold on because most probably these fans are going in expensive planes.

If they cannot recognise the previous problem then they won't be able to fix it on this fan
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Old Aug 23, 2012, 11:12 PM
3DHOG
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USA, CA, Aromas
Joined Sep 2010
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those numbers cant be real I took that as a typo and another thought do we have esc's that have switching rates that will support that high of rpm.......has to be a mistake
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Last edited by jcdfrd; Aug 23, 2012 at 11:40 PM.
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