Exposing the heatsink on your MMM?

[Pdelcast]

Originally Posted by Cartwheels

CC sells the case and fan combo for approx $12. So if it doesn't work out just buy a new case/fan. I might do the same.
I wish CC would build a heavy duty fan that can hold up to some real abuse. That would be the ticket.

In the wurx!

[shaunjohnson]

i'm like brian...
NO FANS!!
but i'm not gonna tamper with my MMM in any way either.

so i try and run my setup so the fan like never comes on...i cant understand why so many people are complaining about fans failing...mine always comes on when needed and is still quiet...quite strange if you ask me.

[primus95]

Originally Posted by shaunjohnson

i'm like brian...
NO FANS!!
but i'm not gonna tamper with my MMM in any way either.

so i try and run my setup so the fan like never comes on...i cant understand why so many people are complaining about fans failing...mine always comes on when needed and is still quiet...quite strange if you ask me.

I see no real need for a fan on 4S if geared correctly, so I agree with you there. But I would also like to keep the ESC as cool as possible , hence chopping the top.

On 5s however, IMO a fan or open case is a must, the heat generated in the ESC & motor so much greater. My motor temp goes up 20C running 5S over 4S

[shaunjohnson]

but i run 6s

[primus95]

Originally Posted by shaunjohnson

but i run 6s

Without a fan? What's your gearing?

Originally Posted by primus95

Without a fan? What's your gearing?

He means that he runs 6S which is going to produce alot more heat and a higher chance of the of the ESC reaching critical temp hence why having the fan is a good backup plan

[sikeston34m]

Originally Posted by primus95

I see no real need for a fan on 4S if geared correctly, so I agree with you there. But I would also like to keep the ESC as cool as possible , hence chopping the top.

On 5s however, IMO a fan or open case is a must, the heat generated in the ESC & motor so much greater. My motor temp goes up 20C running 5S over 4S

You're seeing such an increase in temps because you're using the same gearing.

I put together a 6S setup on an Emaxx using a heli 8 pole outrunner geared for 32mph. I was SHOCKED at how cool everything ran. This was with a MMPro btw. A good indication that amp draw was relatively low.

Motor temps and Esc temps both relate to efficiency losses. These losses stack up and create more heat as amp draw increases.

To increase the voltage and drop the amp load on the motor means more power with less heat. You must gear down to see this.

[RBMike]

You guys have it wrong. Everything is cooler on 6S if your geared & motored properly. I run 6S with 1400 to 1700Kv motors, I take the fan out & forget about it. Always cool.

Power= Voltage X Current

As Voltage goes up, current goes down. Current thru the system is what causes heat not voltage.

If your stuff gets hotter on 5 or 6 S then you have the wrong motor or gearing at least.

With 6S/1400Kv, I use 950 to 1000mA in a 5 minute qualifier with a 2 minute warm up at a fairly large track (NorCal).

Originally Posted by Pdelcast

In the wurx!

You have perked my interest dear sir!