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Cheap high power edf setup questions

Old 11-25-2008, 03:48 PM
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Mike SVOR
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Default Cheap high power edf setup questions

Hi all,
I'm new to EDF and brushless speed controlers.
I am wanting to put a nice over powered edf unit in my new fiberglass f-16 (25" wingspan)

I was thinking of this edf unit and motor:
Unit: http://www.hobbycity.com/hobbycity/s..._7_Blade_3inch

Motor: http://www.hobbycity.com/hobbycity/s...rushless_Motor

I'd like to have a BEC plug on the esc, so could you please give me a few good cheap choices of speed control for this combo?
Planning on running a 3s 2400Mah batt

Thanks!!!
Mike
Old 12-01-2008, 02:20 PM
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Dr Kiwi
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Default RE: Cheap high power edf setup questions

That is a BIG fan for 4900Kv - are you sure you won't go beyond the (probably optimistic) 50A max?
Old 12-01-2008, 02:32 PM
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Mike SVOR
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Default RE: Cheap high power edf setup questions


ORIGINAL: Dr Kiwi

That is a BIG fan for 4900Kv - are you sure you won't go beyond the (probably optimistic) 50A max?
I don't know. I'm a total newb with these inrunner motors and their ability.

What do you suggest?
Old 12-15-2008, 02:08 PM
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stoneenforcer
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Default RE: Cheap high power edf setup questions

wrong motor. wrong battery voltage and mah.
go to www.megamotorusa.com to view a spec/application page to get a better idea of what you need.
Also, you may very well need to up your esc to 80amps. 60 maybe borderline with the correct set up... hard to be sure with that fan.

4-5s lipo NOTHING CHEAP for this as the C rating will need to be atleast 25c.
3300-3700 mah would provide a more solid output.
Old 01-08-2009, 11:38 AM
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nzak
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Default RE: Cheap high power edf setup questions

Mike, I am planning on using that same fan in a Cessna Citation. I have all the stuff I picked out, motor, speed control and battery to go with it. I will look when I get home tonight and see which ones I chose and post it here. I spent a lot of time looking at the combinations and reading about the fan and motors in different forums. I think my final choice seemed to make sense as far as motor RPM per volt and the amps it would take. I am going with a 4S setup.
I am also pretty new to the electric scene and still have a lot to learn. I have spent countless hours online trying to learn as much as possible so I don't waste money on the wrong setup. I think the best single investment would be a Wattsup meter.
Your not too far down the road from me here in Valdosta. How is the flying field there? Our grass is a little too bumpy here, I am concerned for my retracts.

Nick
Old 01-08-2009, 01:25 PM
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Mike SVOR
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Default RE: Cheap high power edf setup questions

I've decided to go with an outrunner.
The motor I chose is this one: http://www.hobbycity.com/hobbycity/s...trunner_2350kv
I started another thread that answered most of the questions I had about KV and fans.
Taken from that thread: http://www.rcuniverse.com/forum/m_82...tm.htm#8255248

ORIGINAL: tIANci

Here is a simple guide:

64mm EDF 3S - 20mm/24mm motor - 4,200KV to 5,300 KV
70mm EDF 3S/4S - 28mm motor - 2,600KV to 3,300 KV
90mm EDF 5S/6S - 36mm motor - 1,600 to 1,800KV

Have fun ok!
That helped me determine a range of KV that I needed.
Since my fan (the 3" hayoe fan) has an impeller of 3", I chose the 2350KV motor. Being an outrunner, it should have plenty of power to spin it with low amperage draw.

Old 01-08-2009, 01:59 PM
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nzak
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Default RE: Cheap high power edf setup questions

That is one of the motors I was looking at also. Let me know how that one does, I am quite curious.
I have an F-16 also, but plan on putting the Stumax fan system in it. It has around 46" wingspan.

Nick
Old 01-09-2009, 01:34 PM
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nzak
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Default RE: Cheap high power edf setup questions

Mike, I noticed that motor has a 4mm shaft. Does the fan come with adapters?

Nick
Old 01-09-2009, 02:28 PM
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Mike SVOR
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Default RE: Cheap high power edf setup questions

yes, it does have a 4mm shaft. This is the adapter for the fan http://www.hobbycity.com/hobbycity/s...idProduct=4865
Old 01-10-2009, 11:50 AM
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nzak
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Default RE: Cheap high power edf setup questions

Excellent, please keep me posted when you get it and test it out. I would love to know how much power it puts out.

Thanks,
Nick

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