Transmitter not sending full throttle
06-12-2007, 12:23 AM
#1
Senior Member
Thread Starter
Join Date: Jul 2006
Location: Morton Grove,
IL
Posts: 573
Likes: 0
Received 0 Likes
on
0 Posts
Transmitter not sending full throttle
I was wondering if anyone was familiar with the situation where the transmitter's full throttle setting is not full throttle for the motor. For example, I push the throttle stick all the way up, but the motor only spins at 80% of full speed.
The reason I am posting is that my new brushless motor is giving about half the thrust it should, so I'm thinking maybe the transmitter is not sending true full throttle to the ESC/motor.
Is it guaranteed that if you listen to the motor at full throttle with trim all the way down, and then increase the trim, and you don't hear a difference in motor RPMs, it means your transmitters full throttle is motor full throttle? In other words, if changing trim at full throttle does not change motor RPM, does that mean the transmitter is definitely sending full throttle?
On my new brushless motor (2408-21T), I hear no difference between trim down and trim up full throttle, but on an old brushed 380, I do hear a difference. In fact, the stock transmitter that came with the RTF kit with the 380 (SDM Cub) causes the motor to give higher RPMs than my other transmitter (E-Sky Lama), even though they give the same max RPMs for the aforementioned brushless motor.
Do some ESCs come with a programming option to set true full throttle? Why would the brushed ESC give difference performances between transmitters but the brushless ESC exhibit no difference? Any help would be greatly appreciated.
The reason I am posting is that my new brushless motor is giving about half the thrust it should, so I'm thinking maybe the transmitter is not sending true full throttle to the ESC/motor.
Is it guaranteed that if you listen to the motor at full throttle with trim all the way down, and then increase the trim, and you don't hear a difference in motor RPMs, it means your transmitters full throttle is motor full throttle? In other words, if changing trim at full throttle does not change motor RPM, does that mean the transmitter is definitely sending full throttle?
On my new brushless motor (2408-21T), I hear no difference between trim down and trim up full throttle, but on an old brushed 380, I do hear a difference. In fact, the stock transmitter that came with the RTF kit with the 380 (SDM Cub) causes the motor to give higher RPMs than my other transmitter (E-Sky Lama), even though they give the same max RPMs for the aforementioned brushless motor.
Do some ESCs come with a programming option to set true full throttle? Why would the brushed ESC give difference performances between transmitters but the brushless ESC exhibit no difference? Any help would be greatly appreciated.
06-12-2007, 04:30 AM
#2
Senior Member
Join Date: Nov 2006
Location: ulverstone, AUSTRALIA
Posts: 638
Likes: 0
Received 0 Likes
on
0 Posts
RE: Transmitter not sending full throttle
i don't think that it will pick up on rpm because of voltage/overheating problems so if it dosent change then maby it is somthing else[&:]
by the way... how hot should these motors run at full throttle?
after a quick (12 sec) burst mine is a LITTLE warm.
shaun
by the way... how hot should these motors run at full throttle?
after a quick (12 sec) burst mine is a LITTLE warm.
shaun
06-14-2007, 02:05 PM
#3
Join Date: Aug 2002
Location: toledo,
OH
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
RE: Transmitter not sending full throttle
hi there from Toledo:
If your tx has end point adjustment / ATV, make sure it is set for 100% throw in each direction.
Motor trim is often different from the trims for other channels, in that, it may only function in the low to mid range and not at all in the upper to full range.
Some ESCs can be set for fixed span or auto span, the CC phoenix series comes to mind. It all depends on the quality of hardware you may have purchased.
ciao -rjf
If your tx has end point adjustment / ATV, make sure it is set for 100% throw in each direction.
Motor trim is often different from the trims for other channels, in that, it may only function in the low to mid range and not at all in the upper to full range.
Some ESCs can be set for fixed span or auto span, the CC phoenix series comes to mind. It all depends on the quality of hardware you may have purchased.
ciao -rjf
