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Cermark motor i need specs?????

Old 11-02-2008, 11:11 PM
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ed3
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Default Cermark motor i need specs?????

If anynoby knows the kv and size of the shaft i would greatly appreciate it. I goggled it but i had no luck . Or if some one has the same motor maybe they can help me out.
Any info is helpful
thanks, ed

the motors says cem-600bl-2 ,,, brushless 600
check the pics
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Old 11-03-2008, 02:10 AM
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crash_out
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I have one, I beleive it is a 3200kv.

It is a 36mm diameter, short can sp600 type motor. Max amps is about 40. the shaft is 5mm.

I run mine in an MEC Superbox 5-1 and a 14x7 APC. It pulls a little less than 40 amps with a 3 cell lipoly. It works okay, but it builds up quite a bit of heat, so I keep flight times less than 5 minutes. I've heard they also will turn an 8x6 APC on 7 nicd cells for glider use intermittantly.

I think I have the info sheet on it around here somewhere, I'll see if I can track it down...
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Old 11-03-2008, 03:59 AM
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ed3
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I would really apreciate it if you found the data sheet, would you think i can run a 7 or 6 inch prop direct drive with a 3 or 4 cell lipo???
Thanks for the info now i can do some testing, i am thinking of putting it in a stryker or a v diamond pusher jet
thanks for the info
ed
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Old 11-03-2008, 04:48 PM
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Bill G
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Originally Posted by ed3 View Post
I would really apreciate it if you found the data sheet, would you think i can run a 7 or 6 inch prop direct drive with a 3 or 4 cell lipo???
Thanks for the info now i can do some testing, i am thinking of putting it in a stryker or a v diamond pusher jet
thanks for the info
ed
I don't think you would need the specs, as in general a 3000+ kv inrunner is usually good for a 4" prop direct drive on 3s. In the planes you have, it would be better to have a small prop anyways, as they are speed and not scale subjects.
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Old 11-03-2008, 04:53 PM
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Its going to be wierd a huge motor with a 5 inch prop, i am going to check it i my watt meter to see what it pulls
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Old 11-04-2008, 08:13 PM
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Dr Kiwi
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I just found this - which makes it even less likely that you can use this motor in Direct Drive (with a 3" prop?):

Cermark BL600-2 (with the Kv of 3750)
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Old 11-04-2008, 10:13 PM
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ed3
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what gearbox should i use??? and ratio??? i dont really use gearbox, because i dont know what pinions and gears to use but my buddy gave 2 of these motors pretty cheap and he had them for a while and just wanted to get rid of them
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Old 11-05-2008, 12:04 AM
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Dr Kiwi
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Well, 3.75:1 would get you to, effectively, about 1000Kv - fine for spinning a decent sized prop at 300-400W or whatever the motor is rated for.
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Old 11-05-2008, 02:53 PM
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Any gearbox that can handle a sp600 motor and is available with a pinion gear for a 5mm shaft should work. I like the MEC Superbox. Check them out at www.modelelectronicscorp.com

The Inner Demon gearboxes are available at www.e-flightline.com

Tower Hobbies carries models from Master Airscrew and Great Planes.

Mine is geared 5.0 to 1, and pulls a little over 40 amps with a 14x7 APC. This will easily hover a 3 lb plane. For higher speed, go with a numerically lower ratio, but you're not going to want to exceed 40 amps-the motor builds up a lot of heat.
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Old 11-05-2008, 06:29 PM
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Bill G
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You know depending on how hard you push it, the motor could still be used DD with a less aggressive 4" prop. I wouldn't run 4s and full throttle all the time however. Your motor is large enough in diameter to produce reasonable torque for small prop DD, even with its kv rating. Its considerably larger than a 370.
I ran Himax 370-4100kv motors with GWS 5030 props on 3s with good success, but knew the max throttle point from wattmeter observation.
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Old 11-05-2008, 07:48 PM
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Whats "dd"
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Old 11-06-2008, 12:19 AM
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Bill G
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Originally Posted by ed3 View Post
Whats "dd"
Direct drive
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