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Old Sep 16, 2012, 07:46 AM
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SpaceAviation's Avatar
Philippines, NCR, Manila
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Change Sun 70mm 10 blade EDF

hey guys.. help me on this..

i'm using Change Sun 70mm 10 blade EDF don't know what will i use.. i want a 2 kg thrust.. what ECS? battery and motor?

thanks!

Happy Flying!
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Old Sep 16, 2012, 03:14 PM
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Dr Kiwi's Avatar
Chattanooga, Tennessee, United States
Joined May 2003
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Here are some specs: for 2Kg thrust you may need more input power and higher rpm than is good for that fan (You may need well over 2000W)... even to get 1800W on 4s you need 128A... on 6s you need 80A.

ChangeSun 70mm 10-Blade Ducted Fan

product summary
• Meterial: fiber reinforced Nylon rotor
• Motor adaptor 2 set (4mm and 3.17mm)
• MAX 1800W
• MAX 52000 RPM
• Suitable motor 2300KV for 6S(not include)
• Suitable motor 3400KV for 4S(not include)
Cyclone power 3300kv on 4s lipo http://edfhobbies.com/index.php?rout...product_id=131
Cyclone Power 2500kv on 5s lipo maxx http://edfhobbies.com/index.php?rout...product_id=128


Disclaimer: EDFhobbies not responsible for burned up motors please read below....

FYI: These fans make a lot of power but, most motors can not handle the same cell count that they were designed for because 10 blades draws more amps than a normal 5 or 6 bladed fan. Its best to use a watt meter to see what the your combo draws. This is the only way to know that you will not damage your motor...

Example:

If your motor was designed 6s and you pair it with CS 10 bladed fan you probably going to have to run it on 4s to keep the amp draw manageable.

A NeuMotors 1527-2300Kv is rated for 2250W and 60,000rpm max. ... you might get near that with your fan at 100A on 6s
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Last edited by Dr Kiwi; Sep 16, 2012 at 03:28 PM.
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Old Sep 17, 2012, 05:17 AM
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SpaceAviation's Avatar
Philippines, NCR, Manila
Joined Sep 2012
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is this okay??

Turnigy L2855 - 2100kv
6S 4500 25C
Vm: 21.86
Ap: 71.80
Wp: 1642.7
Thrust (Kg): 2.4
g/w: 1.46
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Old Jan 22, 2013, 03:39 AM
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sikky's Avatar
USA, AZ, Glendale
Joined Feb 2008
595 Posts
That 2100kv will smoke on 6s...
Edfhobbies 90mm 5s 2400kv 32mm 5mm shaft outrunner looks good for 6s... tams shaft adapters in a het fan shroud "stand off" wood spacer with a added 5mm bearing 450 heli 5mm main shaft $70 I have the shrouds ... standoff knive liddle style...
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Old Jan 22, 2013, 03:41 AM
speedin n da weeds :)
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USA, AZ, Glendale
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Big block ooooyeah!
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Old Jan 22, 2013, 03:48 AM
speedin n da weeds :)
sikky's Avatar
USA, AZ, Glendale
Joined Feb 2008
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erh7771 | 27/11/2011

5lbs of bench thrust SETTLED, 80 amps, 4s 25c 3700mah Rhinos. 6.5lbs of bench thrust SETTLE the peak stuff), 100amps on 5s using 30c 5000m pack...did not hold heat on 10-20 sec runs. Fan starmax fan, well balanced with metal spinner W REALLY nice about this motor is it's weight or la with the starmax fan its 10oz total, it's also an outrunner...keeps magnets a little cooler IMHO

Try this one yet? I know you know you have the parts...
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Old Jan 22, 2013, 04:01 AM
222 km/hr Parkjet flyer
solentlife's Avatar
Latvia, Ventspils pilsēta, Ventspils
Joined Jan 2010
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Quote:
Originally Posted by SpaceAviation View Post
hey guys.. help me on this..

i'm using Change Sun 70mm 10 blade EDF don't know what will i use.. i want a 2 kg thrust.. what ECS? battery and motor?

thanks!

Happy Flying!
Better if in EDF listing .... but anyway - no way Hosť .... it aint gonna do it.

2Kg is a LOT ! You may get 1.5Kg ... but in a model there are substantial losses as soon as you install. ie - my 70mm went from just over 1kg thrust to under 800gr when installed. OK it's not CS ... but even so - losses are there whatever edf you use.

Nigel
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Old Jan 22, 2013, 04:04 AM
speedin n da weeds :)
sikky's Avatar
USA, AZ, Glendale
Joined Feb 2008
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Bl32?
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Old Jan 22, 2013, 04:06 AM
speedin n da weeds :)
sikky's Avatar
USA, AZ, Glendale
Joined Feb 2008
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Go here...
http://www.rcgroups.com/forums/showt...21248&page=412
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