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BrianG · 11.17.2005, 10:01 PM

Cool, maybe I will look into the 7xl. It's rated for 95 max amps, which is a bit close to the 9920's max rating of 99, even taking into account some variation in max values. But, if you experts say it will work relaibly and not overheat/overload, who am I to disagree? :)

I've read a bit about BL motor parameters in general, so I know that Max_RPM = kV * Total_batt_voltage, but is there a parameter that shows the torque rating? I've seen some motors do list the spec, but most don't. Is there a way to calculate it? For example, take the Feigao chart, there are columns for "Max Amps", "Resistance", "RPM/V", and "IO(A)" - nothing about torque. Also, what is the "IO(A)" rating?

Also, I notice all BL motors have three main wires (sensor wires excluded for those models). I assume this is because the motor coils are in delta configuration?

Sorry if these are noob questions. If you can just bear with me, I promise I'll try to stop asking stupid questions. :)

Crazyjr,

Thanks for the welcome! I like the black look too. Unfortunately, the chassis is simply painted, and will chip off the first time I take it out and beat on it. Someday, I'll have one anodized or powder coated for a better finish. I figure normal "chrome" or "brushed" finished wheels and black tires will still look good. I kept the battery tray the natural aluminum for some contrast. I already have a stock black series Revo body.

	(#6)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	11.17.2005, 10:01 PM Cool, maybe I will look into the 7xl. It's rated for 95 max amps, which is a bit close to the 9920's max rating of 99, even taking into account some variation in max values. But, if you experts say it will work relaibly and not overheat/overload, who am I to disagree? :) I've read a bit about BL motor parameters in general, so I know that Max_RPM = kV * Total_batt_voltage, but is there a parameter that shows the torque rating? I've seen some motors do list the spec, but most don't. Is there a way to calculate it? For example, take the Feigao chart, there are columns for "Max Amps", "Resistance", "RPM/V", and "IO(A)" - nothing about torque. Also, what is the "IO(A)" rating? Also, I notice all BL motors have three main wires (sensor wires excluded for those models). I assume this is because the motor coils are in delta configuration? Sorry if these are noob questions. If you can just bear with me, I promise I'll try to stop asking stupid questions. :) Crazyjr, Thanks for the welcome! I like the black look too. Unfortunately, the chassis is simply painted, and will chip off the first time I take it out and beat on it. Someday, I'll have one anodized or powder coated for a better finish. I figure normal "chrome" or "brushed" finished wheels and black tires will still look good. I kept the battery tray the natural aluminum for some contrast. I already have a stock black series Revo body.