22LikesTekno RC EB48.3 Thread
03-13-2017, 12:03 AM - Wikipost
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09-26-2015, 09:27 PM
#393
Hi, newbe advice on electrics if i could.
Our club is running a superlite class, if you don't have a " Superlite " you are allowed to run normal buggy's but on 3s only.
With my .3 if I stick with the 1900kv motor and rx8 gen2 esc would going from 18t pinion to 19 and raising the timing get me close to the same performance as 4s ???
Txs in advance.
Our club is running a superlite class, if you don't have a " Superlite " you are allowed to run normal buggy's but on 3s only.
With my .3 if I stick with the 1900kv motor and rx8 gen2 esc would going from 18t pinion to 19 and raising the timing get me close to the same performance as 4s ???
Txs in advance.
09-26-2015, 10:18 PM
#394
Tech Regular
Hi, newbe advice on electrics if i could.
Our club is running a superlite class, if you don't have a " Superlite " you are allowed to run normal buggy's but on 3s only.
With my .3 if I stick with the 1900kv motor and rx8 gen2 esc would going from 18t pinion to 19 and raising the timing get me close to the same performance as 4s ???
Txs in advance.
Our club is running a superlite class, if you don't have a " Superlite " you are allowed to run normal buggy's but on 3s only.
With my .3 if I stick with the 1900kv motor and rx8 gen2 esc would going from 18t pinion to 19 and raising the timing get me close to the same performance as 4s ???
Txs in advance.
09-26-2015, 10:32 PM
#395
Do not think so, I do not have a calculator for these motos like Motocalc for the air frames but you would need something near 2,500 KV to be in the ballpark of what your 4S with a 1,900 kv produces. My math is most likely off a bit but that should be in the neighborhood of what you should be looking for. Adding one tooth is not going to get you there.
Would you have a link to the motor calculator ?? Txs
Txs again.
Last edited by rcfanep8; 09-27-2015 at 06:28 AM.
09-27-2015, 12:53 AM
#396
09-27-2015, 02:47 PM
#398
09-27-2015, 08:06 PM
#399
Tech Regular
Motocalc is software to match brushless motors to propellers for airplanes, not really applicable to off-road buggies but you can learn about efficiency numbers based on size and wind of a given motor as applied against a given load, the propeller. Going too far outside that zone of rpm either under loading or over loading will result in the motor using too much of the watts as heat and not usable propulsion. Using that software for quite a few years and applying to the airplanes I was flying you begin to realize that all motors have their best efficiency in a given range of rpm and torque for a given sized motor diameter and length.
You could probably get that 2,200 KV motor geared to hit the speeds you need but I am guessing it will be running mostly outside it's efficiency range and run hot, not the best way to put those lipos to good use. For the 11.1 volts you plan to run on 3S, I would try and find a motor that has a KV around your second selection, the 2,650 should be fairly easy to gear accordingly and not be forced to use some humungous pinion to get it up to speed like you would on the 1,900 KV motor.
Long winded answer to try and reply to your question on which motor to run on 3S setup. I am going my best educated guess based on 11.1 volts and trying to hit the same rpm range the 1,900 would be run at on a 4S setup, the 2,650 should be fine and you'll just have to play with the pinion size to get into the comfort zone for acceleration and heat management.
09-27-2015, 09:51 PM
#400
Motocalc is software to match brushless motors to propellers for airplanes, not really applicable to off-road buggies but you can learn about efficiency numbers based on size and wind of a given motor as applied against a given load, the propeller. Going too far outside that zone of rpm either under loading or over loading will result in the motor using too much of the watts as heat and not usable propulsion. Using that software for quite a few years and applying to the airplanes I was flying you begin to realize that all motors have their best efficiency in a given range of rpm and torque for a given sized motor diameter and length.
You could probably get that 2,200 KV motor geared to hit the speeds you need but I am guessing it will be running mostly outside it's efficiency range and run hot, not the best way to put those lipos to good use. For the 11.1 volts you plan to run on 3S, I would try and find a motor that has a KV around your second selection, the 2,650 should be fairly easy to gear accordingly and not be forced to use some humungous pinion to get it up to speed like you would on the 1,900 KV motor.
Long winded answer to try and reply to your question on which motor to run on 3S setup. I am going my best educated guess based on 11.1 volts and trying to hit the same rpm range the 1,900 would be run at on a 4S setup, the 2,650 should be fine and you'll just have to play with the pinion size to get into the comfort zone for acceleration and heat management.
You could probably get that 2,200 KV motor geared to hit the speeds you need but I am guessing it will be running mostly outside it's efficiency range and run hot, not the best way to put those lipos to good use. For the 11.1 volts you plan to run on 3S, I would try and find a motor that has a KV around your second selection, the 2,650 should be fairly easy to gear accordingly and not be forced to use some humungous pinion to get it up to speed like you would on the 1,900 KV motor.
Long winded answer to try and reply to your question on which motor to run on 3S setup. I am going my best educated guess based on 11.1 volts and trying to hit the same rpm range the 1,900 would be run at on a 4S setup, the 2,650 should be fine and you'll just have to play with the pinion size to get into the comfort zone for acceleration and heat management.
09-27-2015, 11:57 PM
#402
09-28-2015, 12:53 AM
#404
09-28-2015, 09:30 AM
#405
Finished my .2 to .3 upgrade, got a chance to run it this weekend.
My first thoughts are that the steering has been tamed down for sure. The shock setup is nice, handles the bumps and jumps great. Need to tweak on the setup a bit more to fit my driving.
Overall happy with the upgrade.
My first thoughts are that the steering has been tamed down for sure. The shock setup is nice, handles the bumps and jumps great. Need to tweak on the setup a bit more to fit my driving.
Overall happy with the upgrade.