Dead V3 - Kill the ESC Fan!

[Sparky]

Well make that 4 dead V3’s. I had two V3 and the first died after 4 or 5min on the track. I think the fans are causing a lot of the failures. So I removed the fan from the second one and ran it. It has now lasted trough about 15 batteries. I’m hoping it keeps up. We need to really push the manufactures to remove the fans from the ESC. Fans are a major problem. If it means running 22.2 volts, then remove the fan and set the ESC specs at 22.2volts.

[lincpimp]

Why do you think the fans are causing the failures? Is the wire rubbing thru and shorting out, thus killing the internal bec?

[E-fanatic]

I am holding my breath, In hopes that thats all the failures and that they are flukes. I would just like a nice 40mph truck thats reliable. Is that to much to ask?

Why do you think it was the fan?

[tedo]

Originally Posted by E-fanatic

I am holding my breath, In hopes that thats all the failures and that they are flukes. I would just like a nice 40mph truck thats reliable. Is that to much to ask?

Why do you think it was the fan?

I know people hate on these, but.... go NOVAK HV! I have had a 6.5HV geared 16/68 and I get 38mph. I have raced hard for 4 months and have not had one single problem. Not one.

Lays it down pretty good at the track against truggies. Mines the one w/ yellow dishes and yellow wing.

[JThiessen]

Originally Posted by tedo

I know people hate on these, but.... go NOVAK HV! I have had a 6.5HV geared 16/68 and I get 38mph. I have raced hard for 4 months and have not had one single problem. Not one.

Lays it down pretty good at the track against truggies. Mines the one w/ yellow dishes and yellow wing.

Responses like this are really not value added to the conversation at hand.

[Unsullied_Spy]

Originally Posted by JThiessen

Responses like this are really not value added to the conversation at hand.

+1, in fact I think of it more as trolling.

With the fans failing, do you think it's possible that they overheat and the internal temp shutoff does not work properly and they cook that way?

[tedo]

Originally Posted by E-fanatic

I am holding my breath, In hopes that thats all the failures and that they are flukes. I would just like a nice 40mph truck thats reliable. Is that to much to ask?

Sorry. It was in response to E-fanatic's question. Didn't mean to offend.

[Slash Racer]

What about taking the fan out and putting an external one near it if there is room so you do not have to worry about it?

[Dagger Thrasher]

A fan in itself shouldn't be the reason for any failure. Like Linc said, the only obvious way a fan could possibly cause a problem would be by shorting out due to pinched insulation, but Linc's re-routing of the wires fixes that. Still, sorry to hear that your MMM's died. :(

[Jabe]

looks like they should add fuse to bec output circuit, so that when something fails (shortcircuit) it wouldnt burn bec...
when replacing that fuse, you should see if there's something wrong.

[BrianG]

Even if the BEC is shorted, it should just send the circuit into a cycling condition, not fry...

[killajb]

I haven't had a chance to run my MMM yet (away for a business trip) but I did bring it along. I mentioned this in another thread, but I was amazed to find how sharp the edges of the circuit board were. The insulation on the fan, receiver out, and switch wires can easily be cut and cause shorts. A suggestion to Castle going forward would be to add another 3mm of clearance on the side of the case where these wires pass the circuit board and perhaps cover them with shrink wrap as well.

[Jabe]

well if thats the case, you should smooth edge with sandpaper etc. just to make sure...

[BrianG]

...or just use an external fan design and have the fan plug into the PCB via a servo plug...

[DRIFT_BUGGY]

Did Castle say it was the fan? I still got the original fan on my V1 (even though it is missing 2 -3 blades)