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Old Apr 27, 2012, 11:39 AM
Registered User
Canada, ON, Brantford
Joined Mar 2011
13 Posts
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Atlas motor specs???

Gooday all,
I am hoping that somebody might know something about a discontinued motor I have. It is an Atlas .46 trainer AM2927/07 outrunner. The specs on this creature have proven to be elusive. I don't want to burn it by guessing at the optimum battery and prop size. I would like to put it on a Goldberg J3 Cub (5-6lb) that I am converting/rebuilding. Any information at all would be greatly appreciated.
Thanks...KenS
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Old Apr 27, 2012, 12:42 PM
Jack
USA, ME, Ellsworth
Joined May 2008
17,000 Posts
Quote:
Originally Posted by KenS22 View Post
Gooday all,
I am hoping that somebody might know something about a discontinued motor I have. It is an Atlas .46 trainer AM2927/07 outrunner. The specs on this creature have proven to be elusive. I don't want to burn it by guessing at the optimum battery and prop size. I would like to put it on a Goldberg J3 Cub (5-6lb) that I am converting/rebuilding. Any information at all would be greatly appreciated.
Thanks...KenS
The attachment is the spec sheet that was included in the box with the 29xx Atlas motors.

That has the 2927/08 (920 Kv) motor on it, your 2927/07 would have a little Higher Kv than that, maybe 1050 or so.

The specs ratings would otherwise be similar and your motor would draw just a little more current with the props recommended for the 2027/08. Both were 200 gram motors and would handle peak input currents of about 3 Watts per gram or 600 Watts.

Jack
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Last edited by jackerbes; Apr 27, 2012 at 12:54 PM.
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Old Apr 27, 2012, 12:52 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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duplicate post deleted...
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Old Apr 30, 2012, 12:15 PM
Registered User
Canada, ON, Brantford
Joined Mar 2011
13 Posts
Jack,
I thank you very much for the info. You just, potentially, saved me having to buy a new motor. Later...Ken
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Old Sep 07, 2014, 12:32 AM
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United States, OR, Eagle Creek
Joined Apr 2007
169 Posts
Atlas 2915/08

HI all ... well I was given a fuse today that I may put to use with a pair of old wings I have laying around and wanted to know how well that atlas 2915/08 would work on it seems to be 1700 kv pretty high suggests 8x4 on 3 cell what can I get by with and not burn it up . 8x4 is pretty small for what I understand or plan on doing . any one using this motor on 3 cell what size prop are you being able to run without overloading the motor to much hope to run a 9" at least for good airflow over the surfaces
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Old Sep 07, 2014, 01:18 AM
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manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
5,270 Posts
I think, not problem with APC 8x4 around 14,000 rpm and 30-32A.
Estimated.

Manuel V.

Note.
I missed the question of using a propeller 9 inches.
Do not think I can handle it.
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Last edited by manuel v; Sep 07, 2014 at 01:07 PM.
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Old Sep 07, 2014, 06:32 AM
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Lnagel's Avatar
Moab, Utah, USA
Joined Apr 2003
6,141 Posts
Motorhead, according to the specs attached to post #2 that motor is pretty much maxed out at 40 amps with and 8x4 prop and a 3s battery. Increasing the prop diameter to 9" will increase the current to approximately 60 amps. I doubt the motor would last very long.

Larry
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Old Sep 07, 2014, 06:37 AM
Jack
USA, ME, Ellsworth
Joined May 2008
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One of the first non CD-ROM style motors I ever bought was an Atlas. And I downloaded a bunch of specs and stuff for them. And it is still on my computer! I think I even still have one or two new in the box Atlas motors somewhere.

The image is the specs for the 2908/15 and the *.pdf file will prepare you for the trivia quiz on Atlas 29xx series motors.

Jack
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Old Sep 07, 2014, 01:14 PM
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manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
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Displaying Jack specifications.
I see that with a 8x4 3slipo, efficiency is very poor in case it was a APC.
Possibly the tests made ​​with a MA 8x4 or equivalent, then this OK.

I rewind 3 motors of these Atlas and am very satisfied with the result.
http://www.rcgroups.com/forums/showthread.php?t=868248

Manuel V.
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Old Sep 07, 2014, 03:50 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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And that was back when the guys that made and sold them knew less about them that the people that used them. So if they got the weight right, and we applied the newly learned 3W per gram rule, and used a watt meter, you would figure out what you had!

But they were solid little motors.

Anyone remember the SkyFly? That was the gift from my son that got me started in RC. And started my learning curve on it too.

Jack
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