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Old Oct 24, 2011, 10:23 AM
Lee Liddle
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Carrollton, Tx
Joined Dec 2006
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3.5kw motor for 64mm, 70mm & 80mm Fans

Yep a 3.5kw motor for small fans is comming to a mailbox near you!

Bench tests have been a Screaming Success!! Fight tests comming soon.

This thread is open to everyone. Believers, nay sayers, smack talkers...come on in. Let`s have some fun.

It won`t be cheap, because it`s difficult to get it right, but it can be done.

If you are intrested, line up.
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Old Oct 24, 2011, 11:06 AM
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Old Oct 24, 2011, 11:31 AM
ReVolt- Proprietary Insanity
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United States, MI, Wixom
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6lbs. In a 70mm has a nice sound to it. Inefficient burst only.
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Old Oct 24, 2011, 12:36 PM
Team White Llama!
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Yeah when they hit +75k, they really are "ear splitting"
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Old Oct 24, 2011, 01:42 PM
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I assume since you list 3 different sizes of fans, that you will have different KV's available???
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Old Oct 24, 2011, 02:01 PM
Lee Liddle
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Carrollton, Tx
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Quote:
Originally Posted by geostomp View Post
6lbs. In a 70mm has a nice sound to it. Inefficient burst only.
Yes, I know that's what's available now, but I'm talking about sustained operation above 3kw and long bursts at power levels approaching 4kw.

It's not for your average jet jocky for sure, but there are some "over the top" types that will HAVE to HAVE one.

Testing so far has been with the 80mm E-flight fan at over 50k.
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Old Oct 24, 2011, 02:04 PM
Lee Liddle
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Carrollton, Tx
Joined Dec 2006
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Quote:
Originally Posted by alexandermh View Post
I assume since you list 3 different sizes of fans, that you will have different KV's available???
Yes, that's the plan.
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Old Oct 24, 2011, 02:21 PM
DELTAS RULE
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tehachapi, CA
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holy crap man!
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Old Oct 24, 2011, 02:34 PM
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signing-in!
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Old Oct 24, 2011, 02:40 PM
Not Funny......
Mike Warren's Avatar
United States, CO, Redstone
Joined Dec 2010
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That's a lot of sustained power.

I wonder tho; along with that power comes the associated heat. 64mm & 70mm fans without good heat dissipation solutions might be problematic?
Unless I'm screwed up somewhere, 3000watts at say 85% efficiency = 450watts of heat to deal with.



-Mike
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Old Oct 24, 2011, 03:07 PM
Big gov never Works
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Skunk Water, Rhode Island
Joined Jul 2002
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Leave it up Lee, to push the envelope..

I would think an alum motor/stator assembly might be necc? I don't think the common plastic will suffice. And a longgggg can motor to run on 12s, to keep the amps reasonable?(lowerKv) Am I thinking in the right direction?

Fuzz
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Old Oct 24, 2011, 04:22 PM
Lee Liddle
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Carrollton, Tx
Joined Dec 2006
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An outrunner in the standoff position solves the heat problems. No heat is transfered to the shroud and there's plenty of cool air for the motor. Short answer because I'm on iPhone and at work. Lol
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Old Oct 24, 2011, 04:39 PM
Big gov never Works
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Skunk Water, Rhode Island
Joined Jul 2002
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Never thought of that, Lee. I have never used an out runner for EDF.

Fuzz
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Old Oct 24, 2011, 06:34 PM
Lee Liddle
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Carrollton, Tx
Joined Dec 2006
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The outrunners work very well for EDF. The thing I like about them is that I can customize the KV or completely rebuild the motor by rewinding and replacing bearings. The quality of these motors is much better than just a few years ago.

There are RPM limitations because outrunners have more poles than inrunners so the esc has to be able to "talk and listen" faster than with inrunners.

Here`s a little teaser.
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Old Oct 24, 2011, 07:03 PM
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ohio
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lets hear more about the one used in the E-flite 80mm fan .... and some numbers.
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