problems.

[steve-b]

Hey guys,

The last few times i have run my boat, it has died out in the water.
Its a jae 21, im running a neu 1515 1y with a SK 120A ESC with a cap board, the batteries are Turnigy 2s 40c in series. I am usually running with a x445, or smilier size/pitch.
I'm thinking that it is the LVC ????
Any thoughts?

I have disconnected the bec from the ESC and am going to run with a external pack, this wont happen until Saturday, I'm hoping to get some feedback before then

Thanks.

Steve.

[Diegoboy]

Does it suddenly stop or slow down to a stop?
Does the steering still function with no throttle or no control at all?
Does the throttle/steering return when you get it back to shore or not?
Has it run well before on the setup you stated or did this start on first run?

[steve-b]

1) It just stops.
2) No control at all.
3) It returns after about 15 mins.
4) It was the first run on this setup.

[jac4412]

I've had this problem in my brushless setup on my shockwave rs... It was a bad soldering job on my BEC and connections, I'd get a couple seconds of run then would die.. How long will the boat run before it dies??

[steve-b]

It will run about 2 mins.

[Doby]

Thermal cutoff perhaps?

[steve-b]

"Thermal cutoff"????

[JMSCARD]

Thermal cutoff perhaps?

I agree... 1515 1y on a 120amp esc is pushing it.... I would prop down to a x440 or x442 and see if the problem persists.... a x445 seems pretty ampy.... usually folks run a 150amp plus esc for the 1515 1y 2200kv motors...

[steve-b]

Is it that the 1515 1y pulls alot of amps?
UL1 setup will turn a x445 all day.

[Fluid]

The 1515/1y is a LOT more potent that the little UL-1 motor. Even the UL-1 will pull 90-100 amps with that prop (datalogged), the Neu is probably pulling 140-150 amps. Your ESC is thermalling - getting too hot and shutting itself down before it melts. If you want to run that motor, get a 180 amp minimum ESC.


.

[JMSCARD]

Is it that the 1515 1y pulls alot of amps?
UL1 setup will turn a x445 all day.

YES... I would be running a x440 or x442.... a x445 is alot of prop like i say for a 120 amp esc... the 1515 is very high 4s amp motor...

[BakedMopar]

I'll put money your hitting the LVC. Also a 120 with that motor is way too small. I ran a 1415 1y in my JAE for a couple runs and would hit the cutoff unless set at 3.0v with fresh 40-50c 5000 turnigys in 1p.

[JMSCARD]

Remember also that a ul-1 is a lower kv motor then the 1515 1y... Higher kv with same voltage = more amps...

[steve-b]

I ordered a 200amp ESC, will see what happens???
Im running out of weather here in Ontario.