Stupid newb question

[BP-Revo]

Can someone link me to the thread?

I find it funny that most of us users (Serum especially) have been blasting MaxAmps for discharged graphs like no other, yet they just wont put out.

Reason probably is that they don't want to make it shown that their packs are grossly overrated.

Anyways, one suggestion for the current draw is because the motor is trying to get X watts. As it draws the current for it, voltage drops, which then requires further current to get X watts. However, this further current FURTHER drops voltage, requiring more current, and it goes round and round until the pack voltage is down like no other and the pack is dishing out tons of current.

Either way, in the end, sounds like a need for a more capable pack.

[johnrobholmes]

Post three, I link the thread.

[BP-Revo]

lol...it DID sound like Jam was getting pissed off...

Ask him to do the test again with a 5000mah pack or something. Something that will undoubtedly provide PLENTY of current.

[MetalMan]

Originally Posted by BP-Revo

Anyways, one suggestion for the current draw is because the motor is trying to get X watts. As it draws the current for it, voltage drops, which then requires further current to get X watts. However, this further current FURTHER drops voltage, requiring more current, and it goes round and round until the pack voltage is down like no other and the pack is dishing out tons of current.

Good idea, but as you know these motors have resistance, and they work off of that. So if voltage drops, current will also drop. In the case of a stall, it's the same thing: as voltage drops while the motor is stalled, current also drops, and the torque output drops ('cuz torque output is proportional to kt and current).

[Serum]

at a certain point the pack can't deliver more current, due to limitations of the internal resistance. This internal resistance also heats up the pack during discharging.

[johnrobholmes]

My main concern is the micro trauma that will happen inside of a pack on such large bursts. Sure, the pack may not be warm after a 60C burst, but that doesn't mean that small burns didn't happen on the thinner spots of the lithium layers. On top of that, every user runs a different rig, a different terrain, and a different driving style. While most will know when to let up, some kids may not let off the throttle when the rig gets bound up and end up smoking, puffing, or flaming a pack that is fine for other people to use.