57LikesThe Speed Passion Thread
02-11-2010, 08:31 PM
#2416
Tech Master
Join Date: Sep 2007
Location: Oreganastan Pacific Wonderland home to Indoor Farming
Posts: 1,059
I have tried to run both the 107 and the 110 with my 1s and booster in my 12th Scale and it does not seem to run properly. It winds out when I run it on my bench but as soon as I put it down for a lap, the car is totally slow. I have been stuck running the 312 or the 323 with this set-up. I would like to know how the 107 or 110 can be run with a 1s LiPo and booster in 12th Scale?
Thanks...
Thanks...
I've got pinions from 12 to 65 and could not get the above to work any differently than you have.........It seems I have read this post before............
Mark
02-12-2010, 12:00 AM
#2417
Sp feigao endless brushless esc
i need info if anyone have use this esc speed passion feigao EXT68801 ....because for its cheap price i might consider to buying it...and its the only available speed passion esc at my LHs now. planing using it with my v3 11.r motor... so f anyone have info... greatly appreciated...
02-12-2010, 02:17 AM
#2419
Tech Initiate
Power = Torque x RPM, so If you want to limit the torque I suggest you reduce the power (Turn down the endpoints on your Tx). I thought that DDRS was basically a dynamic torque control, it limits the initial torque making acceleration smoother. Alternatively you can adjust the throttle exponential to control the initial torque.
At low RPM you have more torque, which is general for all electric motors, which are very different to IC engines! If you assume a decent efficiency through the whole finite RPM range for electric then the way to limit the torque is to decrease the power delivered.
However I do think that it would be cool if you could set a limit in the ESC to, say, 90 Nm (a back of the envelope calculation for a 13.5t motor) over a certain RPM range, independent of which motor you were running, then that would be cool. You could have a 5.5t motor feel like a 13.5t up to 10,000 rpm then progressively get faster and faster.
Ben
At low RPM you have more torque, which is general for all electric motors, which are very different to IC engines! If you assume a decent efficiency through the whole finite RPM range for electric then the way to limit the torque is to decrease the power delivered.
However I do think that it would be cool if you could set a limit in the ESC to, say, 90 Nm (a back of the envelope calculation for a 13.5t motor) over a certain RPM range, independent of which motor you were running, then that would be cool. You could have a 5.5t motor feel like a 13.5t up to 10,000 rpm then progressively get faster and faster.
Ben
02-12-2010, 02:29 AM
#2420
But why is the cont. current and burst current of LPF significantly lower than that of Pro version? Will it affect performance and how?
02-12-2010, 02:39 AM
#2421
The main and really only difference between the GT and the LPF is that the GT is made for mod or lower turn motors. The LPF cannot handle motors below 5.5t I believe. You save money to use on track time or the LCD programmer. If your only going to run between 21.5 to 105 turn motors get the LPF.
02-12-2010, 03:03 AM
#2422
Power = Torque x RPM, so If you want to limit the torque I suggest you reduce the power (Turn down the endpoints on your Tx). I thought that DDRS was basically a dynamic torque control, it limits the initial torque making acceleration smoother. Alternatively you can adjust the throttle exponential to control the initial torque.
At low RPM you have more torque, which is general for all electric motors, which are very different to IC engines! If you assume a decent efficiency through the whole finite RPM range for electric then the way to limit the torque is to decrease the power delivered.
However I do think that it would be cool if you could set a limit in the ESC to, say, 90 Nm (a back of the envelope calculation for a 13.5t motor) over a certain RPM range, independent of which motor you were running, then that would be cool. You could have a 5.5t motor feel like a 13.5t up to 10,000 rpm then progressively get faster and faster.
Ben
At low RPM you have more torque, which is general for all electric motors, which are very different to IC engines! If you assume a decent efficiency through the whole finite RPM range for electric then the way to limit the torque is to decrease the power delivered.
However I do think that it would be cool if you could set a limit in the ESC to, say, 90 Nm (a back of the envelope calculation for a 13.5t motor) over a certain RPM range, independent of which motor you were running, then that would be cool. You could have a 5.5t motor feel like a 13.5t up to 10,000 rpm then progressively get faster and faster.
Ben
02-12-2010, 03:09 AM
#2423
Power = Torque x RPM, so If you want to limit the torque I suggest you reduce the power (Turn down the endpoints on your Tx). I thought that DDRS was basically a dynamic torque control, it limits the initial torque making acceleration smoother. Alternatively you can adjust the throttle exponential to control the initial torque.
At low RPM you have more torque, which is general for all electric motors, which are very different to IC engines! If you assume a decent efficiency through the whole finite RPM range for electric then the way to limit the torque is to decrease the power delivered.
However I do think that it would be cool if you could set a limit in the ESC to, say, 90 Nm (a back of the envelope calculation for a 13.5t motor) over a certain RPM range, independent of which motor you were running, then that would be cool. You could have a 5.5t motor feel like a 13.5t up to 10,000 rpm then progressively get faster and faster.
Ben
At low RPM you have more torque, which is general for all electric motors, which are very different to IC engines! If you assume a decent efficiency through the whole finite RPM range for electric then the way to limit the torque is to decrease the power delivered.
However I do think that it would be cool if you could set a limit in the ESC to, say, 90 Nm (a back of the envelope calculation for a 13.5t motor) over a certain RPM range, independent of which motor you were running, then that would be cool. You could have a 5.5t motor feel like a 13.5t up to 10,000 rpm then progressively get faster and faster.
Ben
I always understood that the DDRS also had an effect upon where the timing came in and how 'soft' or 'brutal' it came in.
If anyone else knows anything about this could you share please?
The main and really only difference between the GT and the LPF is that the GT is made for mod or lower turn motors. The LPF cannot handle motors below 5.5t I believe. You save money to use on track time or the LCD programmer. If your only going to run between 21.5 to 105 turn motors get the LPF.
02-12-2010, 03:16 AM
#2424
Speed Passion Torque Limit
Power = Torque x RPM, so If you want to limit the torque I suggest you reduce the power (Turn down the endpoints on your Tx). I thought that DDRS was basically a dynamic torque control, it limits the initial torque making acceleration smoother. Alternatively you can adjust the throttle exponential to control the initial torque.
Ben
Ben
it's Digital Racing Response System
DRRS Control your aggressiveness related to Throttle response.
and the way what you do to control Torque is Classic.
DRRS must not control DMTS.
The reason is because kV changes.
DRRS does not change those kV and didn't involved timing.
The key is that, there is certain Timing is not allowed to appear
when ever the throttle is. Those Timing is only allowed depend on
certain RPM, and that also depend which motor Turn/Winds.
That's why DMTS for.
unlike DRRS where it control the power it opens.
Torque Control is Maintain torque on DMTS.
The result is Highest RPM to Achieve by having Maximum Torque.
The best Acceleration, and Maximum Efficiency.
02-12-2010, 03:46 AM
#2425
DRRS must not control DMTS.
The reason is because kV changes.
DRRS does not change those kV and didn't involved timing.
The key is that, there is certain Timing is not allowed to appear
when ever the throttle is. Those Timing is only allowed depend on
certain RPM, and that also depend which motor Turn/Winds.
That's why DMTS for.
The reason is because kV changes.
DRRS does not change those kV and didn't involved timing.
The key is that, there is certain Timing is not allowed to appear
when ever the throttle is. Those Timing is only allowed depend on
certain RPM, and that also depend which motor Turn/Winds.
That's why DMTS for.
02-12-2010, 03:55 AM
#2426
It's not DDRS it's DRRS
it's Digital Racing Response System
DRRS Control your aggressiveness related to Throttle response.
and the way what you do to control Torque is Classic.
DRRS must not control DMTS.
The reason is because kV changes.
DRRS does not change those kV and didn't involved timing.
The key is that, there is certain Timing is not allowed to appear
when ever the throttle is. Those Timing is only allowed depend on
certain RPM, and that also depend which motor Turn/Winds.
That's why DMTS for.
unlike DRRS where it control the power it opens.
Torque Control is Maintain torque on DMTS.
The result is Highest RPM to Achieve by having Maximum Torque.
The best Acceleration, and Maximum Efficiency.
it's Digital Racing Response System
DRRS Control your aggressiveness related to Throttle response.
and the way what you do to control Torque is Classic.
DRRS must not control DMTS.
The reason is because kV changes.
DRRS does not change those kV and didn't involved timing.
The key is that, there is certain Timing is not allowed to appear
when ever the throttle is. Those Timing is only allowed depend on
certain RPM, and that also depend which motor Turn/Winds.
That's why DMTS for.
unlike DRRS where it control the power it opens.
Torque Control is Maintain torque on DMTS.
The result is Highest RPM to Achieve by having Maximum Torque.
The best Acceleration, and Maximum Efficiency.
Open to the floor.
02-12-2010, 04:51 AM
#2427
Tech Addict
The point is that you cannot control yourself each individual parameter like you can on for example a GM speedo (should "turbo" come in at 10000 RPM or 11500 RPM etc...) Would be nice if SP would provide this kind of software...
02-12-2010, 06:51 AM
#2428
Perhaps. But I think it would be far better to have a smooth transition, rather than a sudden change at a specified point. Otherwise you are giving something up before reaching the set point. And in low traction conditions the sudden shift can be challenging. This appears to be what SP is providing. And continuing to improve.
02-12-2010, 10:35 AM
#2430
Tech Addict
Perhaps. But I think it would be far better to have a smooth transition, rather than a sudden change at a specified point. Otherwise you are giving something up before reaching the set point. And in low traction conditions the sudden shift can be challenging. This appears to be what SP is providing. And continuing to improve.
...