Smoked motor??

[NitroVal]

I finally got the 5S EKOS onto the water today. Pretty windy and choppy so it didnt make for a good run day. Both the motors (Venom 2880kVs) were running at 160*F, after only about 5 minutes, and no WOT runs. Now one of the motors will only run out of the water, but once its in the water and has a load, it wont run at all. I just want to make sure this is indicative of a blown motor, or if I may have issues in the ESC?

[eboat]

Just swap esc and see what happens

[Rumdog]

What voltage?

[Rumdog]

Oh sorry, I see 5S. Way too high rpm. Prob de-magged the motor.

[NitroVal]

I probably shouldn't have said the voltage. I'd rather see what people's opinions are on the condition that the motor has now, rather than what the conditions the motor was in while it happened..

[Rumdog]

Well, that is most definitely the problem. WAAAAY too high rpm! I'm quite sure others will agree with this.

[NitroVal]

Im willing to bet I never went past 30k RPMs. Maybe a few times when the boat got airborne. The math on this setup says it should do deep into the 70mph range, I barely got into the 40's. And yes, I do know it would never do 70mph, but I never went WOT

[Mel279]

Your motors has been d magnetize, IMO replace the motors, don't run it again or u might end up fried your esc's.

[ozzie-crawl]

you ran 2880 kv motors on 5s and then say the motors got hot after only 5 minutes
that kv even on 4s would be just acouple short squirts then bring it in.
running at partial throttle wouldnt help either

[Ub Hauled]

I finally got the 5S EKOS onto the water today. Pretty windy and choppy so it didnt make for a good run day. Both the motors (Venom 2880kVs) were running at 160*F, after only about 5 minutes, and no WOT runs. Now one of the motors will only run out of the water, but once its in the water and has a load, it wont run at all. I just want to make sure this is indicative of a blown motor, or if I may have issues in the ESC?

Windy conditions?
Over volting and not compensating with a smaller prop?
Lots of wind and chop?
REEEEEALLY LONG run times, specially for that kinda power push?

I smell setup for failure...
Try switching ESCs on the motor that is not working and see what happens, if the same happens then it's the motor, if it doesn't, it's the ESC or the battery. Then switch the battery packs and if the same happens then it's the ESC.

Im willing to bet I never went past 30k RPMs. Maybe a few times when the boat got airborne. The math on this setup says it should do deep into the 70mph range, I barely got into the 40's. And yes, I do know it would never do 70mph, but I never went WOT

The motors probably went over 30k rpm... not the 53k that the nominal state would have taken it but only because of efficiency issues due to the power that this motor can output, also, it only goes to show that you had too much prop... by over volting it you set it up to fail, I am surprise you don't have 2 fried motors and two ESCs. The math you did on this setup has obviously not taken all factors under consideration, well the really big ones at least... it would've never entered even the 60 realm with this setup, maybe 50's. Not going WOT only put some extra strain on the ESCs.

I probably shouldn't have said the voltage. I'd rather see what people's opinions are on the condition that the motor has now, rather than what the conditions the motor was in while it happened..

Why? What are you trying to achieve by not telling us the setup? An educated decision can only be made with all variables available.

On a personal note... Why are you blowing money on this? What's the point of having this Cat on 5s?

[ozzie-crawl]

i would love to see that setup data logged

[Ub Hauled]

i would love to see that setup data logged

nothing would show Scott, it would be off the charts, hehehehe

[ozzie-crawl]

your probably rite, as you know a brushless motor will fairly much put out what is jammed into it till it dies
a mate and i data logged a 380 fiegao motor that was producing around 2300 watts but yes not for long
will try and get the data run from that if he still has it
we knew it was going to have a short life but wanted to see how it would go

[Ub Hauled]

I bet it was nice.. a 2300w 380 motor, hehehehe

[Drag Boat Bob]

I finally got the 5S EKOS onto the water today. Pretty windy and choppy so it didnt make for a good run day. Both the motors (Venom 2880kVs) were running at 160*F, after only about 5 minutes, and no WOT runs. Now one of the motors will only run out of the water, but once its in the water and has a load, it wont run at all. I just want to make sure this is indicative of a blown motor, or if I may have issues in the ESC?

Is there any insulation left on the motor leads? LOL!

Sounds like not many were following you on the EKOS thread.

Well you cannot say that you really didn't expect this to happen.

Venom has told me that the ESC's thermal shutdown works very well and it survived my motor meltdown. Hopefully they are correct as I took them on faith (may have been a stupid move on my part); we'll see.

Since the option of replacing the motors from Venom is out of the question for quite a while, I guess you will install the Neu's that were waiting anyway.