OK, these motors just don't last - now what  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Helicopters >> Electric RC Helis >> OK, these motors just don't last - now what
Page: [1] 2 3   next >   >>  

Login
Message << Older Topic   Newer Topic >>
OK, these motors just don't last - now what - 2/6/2004 1:07:30 AM   
jerbo6iks


 

Posts: 49
Joined: 12/28/2003
From: Richmond, VA, USA
Status: offline 		I work at home so I have had a lot of opportunity to fly this dragonfly heli since new year. I have probably flown it every day, at least 4-6 750 mah batpacks. Seems like the 270 motor lasts about 2 weeks under that scenario. I have heat sinks. So that is about 12 hours of flight time before the main motor starts to loose power erratically, dropping down with the nose swinging right, or just erratic power requiring lots of rudder adjustments. Flight time also drops dramatically (red light on mixer comes on after a couple of minutes).

I will check that the pinion is still on there solidly. I'm pretty sure it is.

Can I get a brushless motor and use the same speed control/mixer board or do I need to replace the the electronics.

I have the seperate speed control/mixer and gw03 gyro setup.

Thanks for the help.

I like the 270 stock motor when it is working right.
       Post #: 1

RE: OK, these motors just don't last - now what - 2/6/2004 1:13:39 AM   
darkside212


 

Posts: 256
Joined: 5/15/2003
From: Milwaukee, WI, USA
Status: offline 		Here's a motor that works awesome!!! The only thing you have to do is retap the mount holes (or find a screw that fits them)

http://www.allelectronics.com/cgi-bin/category.cgi?category=400&item=DCM-189&type=store

(in reply to jerbo6iks)
       Post #: 2

RE: OK, these motors just don't last - now what - 2/6/2004 1:32:58 AM   
jerbo6iks


 

Posts: 49
Joined: 12/28/2003
From: Richmond, VA, USA
Status: offline 		I saw one of your posts on a previous questions. Is this for real? I guess you just use these and chuck them which I what I'm doing anyway. Did you solder a capacitor across the motor terminals like on the stock motor?

(in reply to darkside212)
       Post #: 3

RE: OK, these motors just don't last - now what - 2/6/2004 1:39:09 AM   
leith


 

Posts: 15
Joined: 1/16/2004
From: whitby, ON, CANADA
Status: offline 		Before each flying session spray WD40 into the brush release holes on the rear of the motor. Be generous. This lubricates the bushings and the brushes, and I have found realy extends the life of these little motors

(in reply to jerbo6iks)
       Post #: 4

RE: OK, these motors just don't last - now what - 2/6/2004 1:45:02 AM   
darkside212


 

Posts: 256
Joined: 5/15/2003
From: Milwaukee, WI, USA
Status: offline 		Yeah I took the caps off the old motor. Works great. The funniest thing is: I ordered 8 motors for $4, and the shipping was $6!! They ship real fast I ordered mine Wednesday night, and got them Saturday.

(in reply to jerbo6iks)
       Post #: 5

RE: OK, these motors just don't last - now what - 2/6/2004 2:39:15 AM   
lawnhawk



Posts: 198
Joined: 11/28/2003
From: McHenry, IL, USA
Status: offline 		darkside212,
Thanks for posting that allectronics site. I'll be on my way there now to go broke! AWESOME site...

(in reply to darkside212)
       Post #: 6

RE: OK, these motors just don't last - now what - 2/6/2004 2:45:36 AM   
darkside212


 

Posts: 256
Joined: 5/15/2003
From: Milwaukee, WI, USA
Status: offline 		I can't take credit for it. mpj220 on runryder.com first brought it to my attention. I just want everyone to know where the best stuff for your money is. Those motors rock, and they have a lot of other useful stuff as well.

(in reply to lawnhawk)
       Post #: 7

RE: OK, these motors just don't last - now what - 2/6/2004 5:54:01 AM   
Smithaw


 

Posts: 78
Joined: 1/26/2004
From: Puyallup, WA, USA
Status: offline 		these are the tail motors right. Not the main motors.

(in reply to darkside212)
       Post #: 8

RE: OK, these motors just don't last - now what - 2/6/2004 7:11:41 AM   
Super-Hornet


 

Posts: 565
Joined: 1/13/2004
From: Earth, SINGAPORE
Status: offline 		Hi

First of all.. I assume DF Stock tail motor is CN10-Plus. If anyone has the correct brand and model, plz let me know.

Ok..
By looking at the spec, the Johnson Motor might be too under voltage rating and spin slower than the stock motor. (Its rating is 1.5 to 3V. Your batteries is 8.4Volt or higher)With that, it may even easily damage. Are u running in Direct Drive? Anyway, since u said it is damn cheap, think some of u don't mind keep on replacing it once in the while.

BTW... U need the capacitor to extend the motor life a bit. Without the capacitor, u will see more sparks coming out at the brush.

Super-Hornet

< Message edited by Super-Hornet -- 2/6/2004 3:15:08 PM >

(in reply to Smithaw)
       Post #: 9

RE: OK, these motors just don't last - now what - 2/6/2004 12:47:34 PM   
jerbo6iks


 

Posts: 49
Joined: 12/28/2003
From: Richmond, VA, USA
Status: offline 		looks like the main motor to me based on the dimensions.

(in reply to Smithaw)
       Post #: 10

RE: OK, these motors just don't last - now what - 2/6/2004 12:48:22 PM   
jerbo6iks


 

Posts: 49
Joined: 12/28/2003
From: Richmond, VA, USA
Status: offline 		looks like it is rated to 6v, the desc just quotes some specs at 3V

(in reply to Super-Hornet)
       Post #: 11

RE: OK, these motors just don't last - now what - 2/6/2004 1:25:58 PM   
darkside212


 

Posts: 256
Joined: 5/15/2003
From: Milwaukee, WI, USA
Status: offline 		"these are the tail motors right. Not the main motors"

no these are the main motor. They fit perfectly with the only mod needed is retapping the holes to accept a 3mm screw (you can try to find a screw that fits the original,but its really small, and I couldn't find one)

(in reply to jerbo6iks)
       Post #: 12

RE: OK, these motors just don't last - now what - 2/6/2004 3:37:39 PM   
Super-Hornet


 

Posts: 565
Joined: 1/13/2004
From: Earth, SINGAPORE
Status: offline 		Hi jerbo6iks

if you said it is for main motor and the voltage rating is 6v then it should be ok EXCEPT that the RPM is way too low. I think u need higher teeth or bigger pinion. I wonder how is the torque?

Super-Hornet

(in reply to darkside212)
       Post #: 13

RE: OK, these motors just don't last - now what - 2/6/2004 4:08:08 PM   
jerbo6iks


 

Posts: 49
Joined: 12/28/2003
From: Richmond, VA, USA
Status: offline 		Good question. I would love to see a detailed spec sheet on the stock 270 motor and one of these Johnson motors for comparison purposes. Torque and power vs RPM at a given voltage would be great. Doubt I'll find one though.

(in reply to Super-Hornet)
       Post #: 14

RE: OK, these motors just don't last - now what - 2/6/2004 4:16:17 PM   
darkside212


 

Posts: 256
Joined: 5/15/2003
From: Milwaukee, WI, USA
Status: offline 		It has more torque and more rpm than the 280 and the 370. I have run it with a 9t 10t and 11t pinions( with a 2cell lipo), and found the 9t to give the best results.

I don't know why you guys are having such a hard time believing that this motor is better than the 280 and 370. You know those motors are junk, but if you want to keep spending $15+ on crap go right ahead. I just thought that maybe you would like to save 3000% on something that is 30 times better.

(in reply to jerbo6iks)
       Post #: 15

RE: OK, these motors just don't last - now what - 2/6/2004 4:37:47 PM   
jerbo6iks