Thread Tools
Old Aug 28, 2004, 12:39 AM
New Park Pilot is offline
Find More Posts by New Park Pilot
Registered User

Brushless motor kicks back at low throttle settings???

I have an E-flight park 370 and a CC-25 speed control. When you advance the throttle slowly, as soon as the motor wants to start to turn, it kinda jumps and wants to kick back, but when you advance the throttle past this point it is fine. I have checked the gear mesh and that is fine. Is this just normal behavior? Also, are different brands of brushless motors wired up differently? I have a himax 2015 and when it is plugged into the speedo red-to-red, black-to-black, etc.. it turns in the right direction, but my e-flight motor turns backwards when plugged up like this. Is it OK to just reverse the red and the black wires? Thanks in advance for any advice that you guys can lend.

Sign up now
to remove ads between posts
Old Aug 28, 2004, 01:06 AM
Foamaholic is offline
Find More Posts by Foamaholic
Electric since 1990
Foamaholic's Avatar
Many brushless motors, including my Himax which is basically the same as the E-flight, kick a little on the first click of throttle.
It's normal. Just advance the throttle a little faster at first.
It's fine to switch any two wires on a brushless motor. That's how you get it to change direction.
Old Aug 28, 2004, 01:37 AM
PGR is offline
Find More Posts by PGR
Low AltiDude
PGR's Avatar
The Phoenix 25 has 2 settings which can cause the stutter-start problem you describe if set incorrectly: Electronic Timing Advance & Soft Start.

I'm not familiar with the E-Flight motors so I can't really suggest a setting for the Electronic Timing Advance. You can experiment a little, though, but beware that more aggressive timing draws more amps.

Before messing with the timing, try turning off the Soft Start and see what happens. I had to do this on a 3D plane to get an AXI to restart reliably.

Old Aug 28, 2004, 08:22 AM
Ron van Sommeren is offline
Find More Posts by Ron van Sommeren
homo ludens modellisticus
Ron van Sommeren's Avatar
A bit of a wiggle is normal for brushless motors, ESC trying to figure out rotor position for synchronisation.

Met vriendelijke groet Ron van Sommeren
Old Aug 28, 2004, 09:49 AM
New Park Pilot is offline
Find More Posts by New Park Pilot
Registered User
Thanks for the advice guys.
Old Aug 28, 2004, 09:55 AM
Krashlnd is offline
Find More Posts by Krashlnd
Who Put that Tree There?
Krashlnd's Avatar

Same problem here

Thats what I did. I turned off the soft start. Like a charm now.
Old Mar 24, 2015, 03:30 AM
chuck75 is offline
Find More Posts by chuck75
Registered User
Some of the CC ESC's and possible motor combinations need a higher starting current setting.
A possible way to determine this is to see if the problem occurs with out a propeller, and increase the starting current setting until it is less or goes away. If adding the propeller causes it to return, try increasing the current further. Rapid throttle advance may also cause the problem to occur.
Old Mar 24, 2015, 07:43 AM
Ron van Sommeren is offline
Find More Posts by Ron van Sommeren
homo ludens modellisticus
Ron van Sommeren's Avatar
Jeez Chuck, where did you dig that one up ?

Vriendelijke groeten Ron
Old Mar 24, 2015, 08:14 AM
Mike Dubovsky is online now
Find More Posts by Mike Dubovsky
I am a nice guy! Really!
Throwback Tuesday? I hope not! Eh bien, better late than never with the help.

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
CD-ROM Motor runs rough at low throttle spudboy 3D Flying 8 Nov 30, 2004 04:56 PM
is a speed control under more stress at lower throttle settings? Matthew Cotten Power Systems 5 Oct 24, 2003 08:15 PM
Feigao China brushless motor, available here at all? (DNA?) e-sailpilot86 Electric Plane Talk 4 Aug 22, 2003 02:16 PM
Help with nose high E3D at low throttle Ninjak2k Sport Planes 15 Aug 06, 2003 12:31 AM
ZAGI 400-X ; power cutting out to motor after flying at full throttle Joe-z Foamies (Kits) 29 Jul 15, 2001 11:51 PM