Is this a problem?

[Pitch-Itch]

Hi guys, I mentioned in another thread that my kosmik log shows amp spikes of nearly 430. I regularly hit over 300 throughout the flight also.

Now, a couple people in that thread basically called BS which made me wonder if this is an issue?

My setup is 12s on an Avant Mostro. KDE 700xf motor and kosmik 160. This flight was at 2200 head speed.

Is there something wrong with my setup? Thanks guys.

[dl7uae]

Is there something wrong with my setup?

I would not call it that.
2200 head speed in a 700-sized just want to be served.

[Pitch-Itch]

Originally Posted by dl7uae

I would not call it that.
2200 head speed in a 700-sized just want to be served.

Ok, good. There were guys saying that even speed setups don't reach this kind of amperage so it had me a little worried I guess.

If this is going to continue I probably should add some active cooling.

[dl7uae]

If there is something abnormal, it is the motor.
How would you otherwise (based on your flight) explain the extreme power surges?
Explain to me please one thing: expensive ESC and a KDE motor?

Guys, I love your extremism. Sorry to say: It needs to have no sense of electrical and physics to fly such setups.

The motor seems more likely to "eat" energy in peaks than convert it.

[RontaryUS]

How does the PWM graph look like in your log? Also, Imot is a better and direct, non calculated, measure of the amp draw.

[dl7uae]

Arrghh! Thx, my fault.. Did not see that this is ImotPeak. Forget about this item. He's right, use only Imot.

Value of Imot may be about sqrt(2) below Ipeak.

[madeye]

Originally Posted by dl7uae

Explain to me please one thing: expensive ESC and a KDE motor?

I sense something in this sentence, but can't make sense out of it (no pun intended), without doubt due to the fact that I don't know something you're referring to.

Could you please elaborate on what you said? Did you imply that KDE motors are bad?

[Pitch-Itch]

Originally Posted by madeye

I sense something in this sentence, but can't make sense out of it (no pun intended), without doubt due to the fact that I don't know something you're referring to.

Could you please elaborate on what you said? Did you imply that KDE motors are bad?

I think he's implying that I cheaped out on the motor since I didn't get a pyro.

I actually love the kde motor. I have used pyro motors in the past, and they consistently were disappointing in the power department. If you want a light motor, sure, get a Kon motor. If you want gobs of power you need to look elsewhere. Just my own experience.

I love this kde motor. Not to mention Patrick is a hell of a lot faster than Kontronik support. I got an 8mm shaft put in my motor. Sent it out and had it back in my hands in 3 days time. Out on Monday back on Friday. It wouldn't have even made it to Germany in that time if I had needed work on a pyro.

[Pitch-Itch]

Originally Posted by RontaryUS

How does the PWM graph look like in your log? Also, Imot is a better and direct, non calculated, measure of the amp draw.

Not great, but not bad. I hit 100% pwm often, but I'm no where near being at 100% the whole flight.

[RontaryUS]

So if your gearing is fine, Imot (not the peak one) reasonable (avg around 100+ and few peaks at 200+) and your FET temperatures OK I would not worry much.

[Pitch-Itch]

Originally Posted by RontaryUS

So if your gearing is fine, Imot (not the peak one) reasonable (avg around 100+ and few peaks at 200+) and your FET temperatures OK I would not worry much.

Temps are fine. Peak imot is around 300.