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BrianG · 08.29.2007, 10:24 AM

It is VERY tough to estimate current draw without a measuring device like an Eagletree. At best, you can determine the average current draw by your battery capacity and runtime, but it's VERY rough since BL cars are very peaky with current spikes. But, I can say that you aren't drawing 200A constantly since runtime would only be 1.5 minutes.

What seems to be pretty accurate is to figure out your average current draw by:
(battery_Ah X 60) / runtime_minutes
Then, multiply this value by about 6 to get the approximate peak current. It's not scientific, but from the various graphs I've seen, it seems to be pretty close.

4s, 4.3:1 F/R diffs, 1515/1.5d (2700kv), 5.1:1 CD gearing, 5.75" tires should give you a speed around 40mph. Is this what you are shooting for?

	(#8)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	08.29.2007, 10:24 AM It is VERY tough to estimate current draw without a measuring device like an Eagletree. At best, you can determine the average current draw by your battery capacity and runtime, but it's VERY rough since BL cars are very peaky with current spikes. But, I can say that you aren't drawing 200A constantly since runtime would only be 1.5 minutes. What seems to be pretty accurate is to figure out your average current draw by: (battery_Ah X 60) / runtime_minutes Then, multiply this value by about 6 to get the approximate peak current. It's not scientific, but from the various graphs I've seen, it seems to be pretty close. 4s, 4.3:1 F/R diffs, 1515/1.5d (2700kv), 5.1:1 CD gearing, 5.75" tires should give you a speed around 40mph. Is this what you are shooting for?