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Reedy Sonic 17.5 with a Tekin ESC - 12/2/2012 1:11 PM   
samw2278


 

Posts: 22
Score: 100
Joined: 2/18/2009
Last Login: 12/5/2012
From: KillingworthNSW, AUSTRALIA
Status: offline 		Hi guys,

I was running a Fantom 17.5 T Brushless motor with a Tekin RS ESC and keeping up with the other Stock cars. Th shaft broke in the motor, so I bought a Reedy Sonic 17.5 T Brushless to replace it. The new motor is running with the same gearing (6:1 FDR) and the same Tekin ESC and settings. But the car is dead slow. My speedo used to show 68 km/hr down the straight before, not even with 45 deg motor timing, the best I get is 50 kms/hr.

Can anyone gve me any ideas why the motor/ESC are running so slow.

PS This is in a Serpent S411 with a Reedy 5000 mAHr 60 C battery.

Sam

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RE: Reedy Sonic 17.5 with a Tekin ESC - 12/3/2012 2:17 AM   
OvalRacer99



Posts: 597
Score: 153
Joined: 7/6/2009
Last Login: 5/24/2013
From: Watertown, SD, USA
Status: offline 		Not all motors are created equal. You will get some that will run better than others and also, some motors like diffrent gearing.
I would recamend double checking all conections, make sure your esc setings are good and if that doesn't help, try diffrent gearing.



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RE: Reedy Sonic 17.5 with a Tekin ESC - 12/5/2012 3:33 PM   
i8tweety



Posts: 4207
Score: 133
Joined: 10/27/2002
Last Login: 5/24/2013
From: Northridge, ON, CANADA
Status: offline 		Make sure the entire drivetrain is smooth and nothing is bent. When the rotor shaft failed, it may have caused some damage.

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RE: Reedy Sonic 17.5 with a Tekin ESC - 12/5/2012 8:41 PM   
samw2278


 

Posts: 22
Score: 100
Joined: 2/18/2009
Last Login: 12/5/2012
From: KillingworthNSW, AUSTRALIA
Status: offline 		I am almost positive that there is a problem with the motor. It is acting like the stator is assembled incorrectly or something similar. I set up the ESC to have zero boost and have forward and reverse.

When I run the car forward it has half the speed that it has in reverse. I have to move the timing to 45 deg for forward and reverse to have equal speed.

When I set the ESC to have boost, in the air with zero motor timing, the car shows 30 kms/hr forward and 140 kms/hr in reverse.

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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Electric On-Road vehicles, race cars and more >> Reedy Sonic 17.5 with a Tekin ESC
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