Amp draw question?

[Blackjack-sven]

I'm trying to figure out what esc to go with but the math doesn't seem to add up.
I'm looking at my Feigao 8XL which produces up to 1000watts and a 4s 14.8volt battery.
Now if I'm not mistaken the motor should draw 67.56
BUT if I increase the voltage to 6s, the motor only draws 45.05????
How is that possible? I thought that the higher the voltage and C rating the faster the boat and the bigger the amp draw from the motor?

Is there any "Amp Draw" calculator or can someone explain what I'm doing wrong or even If I'm doing anything wrong...

Thanx guys

[m4a1usr]

I'm trying to figure out what esc to go with but the math doesn't seem to add up.
I'm looking at my Feigao 8XL which produces up to 1000watts and a 4s 14.8volt battery.
Now if I'm not mistaken the motor should draw 67.56
BUT if I increase the voltage to 6s, the motor only draws 45.05????
How is that possible? I thought that the higher the voltage and C rating the faster the boat and the bigger the amp draw from the motor?

Is there any "Amp Draw" calculator or can someone explain what I'm doing wrong or even If I'm doing anything wrong...

Thanx guys

Thats part of the fallacy of using an online calculator. It uses constants that assume the dynamics dont change or remain predicable. The truth is they are variable to some degree. What seems like a conservative computation will end up being something far different in practical application. Use any tool only as a starting point. Too many variables are in most formulas. Your using a basic tool.

But to answer your question if the setup uses the same prop, the same batteries (weight/location), the same esc and the same motor. You dont change hardware/ride angle/ CG and wiring your chances are good that as voltage goes up, amperage goes down. Thats the assumption. Works for the most part. But its not gospel.


John