Thread Tools
Old Jun 14, 2005, 07:55 PM
BING! is offline
Find More Posts by BING!
Registered User
BING!'s Avatar

Got my Rocket 3600 motor. Almost no cogging....(WOW, great motor!)


The price was right so I bit. I got a Rocket 3600 motor on sale for less the $ 39.99 shipped. Now that I have it, I did a cursory check and found that it had barely any cogging? A Johson 250 has more cogging than this motor. Ive had a B20, a Razor 300, a few MEGA 1615s, a few AXIs and all had cogging. Again, I did not expect to get much for the price, but I did expect it to have magnets. Should I be concerned?

bing
Last edited by BING!; Jun 19, 2005 at 01:33 AM.
Sign up now
to remove ads between posts
Old Jun 14, 2005, 08:25 PM
sneu is offline
Find More Posts by sneu
Registered User
sneu's Avatar
Quote:
Originally Posted by BING!
The price was right so I bit. I got a Rocket 3600 motor on sale for less the $ 39.99 shipped. Now that I have it, I did a cursory check and found that it had barely any cogging? A Johson 250 has more cogging than this motor. Ive had a B20, a Razor 300, a few MEGA 1615s, a few AXIs and all had cogging. Again, I did not expect to get much for the price, but I did expect it to have magnets. Should I be concerned?

bing

Cogging or a lack of don't say much about the magnets. What counts is how it performs.

Steve
Old Jun 14, 2005, 08:58 PM
376782 is offline
Find More Posts by 376782
Registered User
To the best of my knowledge most in runner type of motors do not have any cogging as there is no iron stator for the magnets to work against. I have both a Himax and E-flite which have absolutely no cogging.

I too have ordered the same motor and am looking forward to trying it out in my mini Funtana.
Old Jun 14, 2005, 09:02 PM
DavidB. is offline
Find More Posts by DavidB.
X-Era Motors
DavidB.'s Avatar
Ironless motors don't have any cogging. These include....

Kontronik inrunners and Tango
all hacker inrunners
feigao
Himax
great planes inrunner
millions of other cheap clones

Other motors may or may not have strong cogging depending on the magnet configuration. Usually low pole count motors have stonger cogging than high pole count varieties....so basically low cogging doesn't tell you anything about a motor.
Old Jun 15, 2005, 12:51 AM
sneu is offline
Find More Posts by sneu
Registered User
sneu's Avatar
Quote:
Originally Posted by DavidB.
Ironless motors don't have any cogging. These include....

Kontronik inrunners and Tango
all hacker inrunners
feigao
Himax
great planes inrunner
millions of other cheap clones

Other motors may or may not have strong cogging depending on the magnet configuration. Usually low pole count motors have stonger cogging than high pole count varieties....so basically low cogging doesn't tell you anything about a motor.
Actually to be correct only the Kontronik Tango are ironless. All the others you listed have iron stators. What they lack are stator teeth.

Steve
Old Jun 15, 2005, 04:24 AM
BING! is offline
Find More Posts by BING!
Registered User
BING!'s Avatar
I will solder on some connectors and do some tests. I am glad to find out that cogging is not an indicator of motor strength. Thanks people.
Old Jun 15, 2005, 03:01 PM
DavidB. is offline
Find More Posts by DavidB.
X-Era Motors
DavidB.'s Avatar
Quote:
Originally Posted by sneu
Actually to be correct only the Kontronik Tango are ironless. All the others you listed have iron stators. What they lack are stator teeth.
LOL, if you wanna get that picky then the Tango has iron too. It just rotates with the field eliminating iron losses other than those caused by harmonics. I'm not quite as clueless as you think
Old Jun 19, 2005, 01:35 AM
BING! is offline
Find More Posts by BING!
Registered User
BING!'s Avatar
I finished soldering some connectors to the Rocket 3600 motor. Hooked it up to a Castle Creations 25, a Wattage EDF and a GP2200 10 cell pack as a power supply.

WOW! It hit 24.3 amps and that EDF was singing. Thanks STUFFWELIKE! Great motor.

This one is going in a turbo vector.
Old Jun 19, 2005, 02:40 AM
ryanl2006 is offline
Find More Posts by ryanl2006
Registered User
ryanl2006's Avatar
Quote:
Originally Posted by DavidB.
....so basically low cogging doesn't tell you anything about a motor.
Amen to that...I have seen a lot of posts here lately about people saying "my motor cogs stronger so it is better" type of thing. It really means nothing...
Old Jun 19, 2005, 11:18 AM
sneu is offline
Find More Posts by sneu
Registered User
sneu's Avatar
Quote:
Originally Posted by DavidB.
LOL, if you wanna get that picky then the Tango has iron too. It just rotates with the field eliminating iron losses other than those caused by harmonics. I'm not quite as clueless as you think
Picky ?? of then the Kontronik Tango is "iron lossless" --of the bunch it does not have stator laminations. All the others do.

Clueless--that is for you to decide--I did not make any such comment! You made the comment that the Hacker--etc were "ironless" which is wrong.

Steve
Old Jun 19, 2005, 11:34 AM
DavidB. is offline
Find More Posts by DavidB.
X-Era Motors
DavidB.'s Avatar
Ironless is commonly (incorrectly) used to mean any slotless motor. I should have said slotless, but my brain was somewhere else. I think I must like to argue when we clearly both know how each motor is constructed....although I don't make money selling superb BLDC motors, so that puts you in a class by yourself


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Rocket 3600 motor getting hot newguy Power Systems 17 Jul 12, 2005 10:58 AM
Himax motor with no cogging? Parkflyer Power Systems 4 Nov 22, 2003 01:22 AM
Just got Kans.....what should be my first charge thor4944 Batteries and Chargers 13 Mar 12, 2003 12:34 PM
Just got my Tower Hobbies 12v 4.5A battery should I charge it? f2racer Electric Plane Talk 0 Oct 25, 2001 08:24 PM
Got my P-38, retracts or no? slowflyer Scale Kit/Scratch Built 15 Jul 27, 2001 11:10 PM