Dead Hyda 240

[krusty]

I replaced the cap in my hydra did a couple of short runs and cooked it. I have had alot of problems with ESC even my stock set up blew a cap and I don't know how to change the cap on the stock one. Any ways I am thinking about the Etti Brushless Navy Race 150 with BEC any thoughts how tough is this ESC? and can I use my castle link to program it? here is what I am running. I have definatly run out of money to throw at this boat if this ESC does not last I fear that it will be the end of my venture into F.E.

Feigao 8 xl
fullers hard ware
Maxx amps 8400 35C 7.4volt X 2
(dead) Hydra 240

[domwilson]

Krusty,
What props are you using?
Does your drive line spin freely? Does the motor spin freely?
Do you have any other batteries you can try?
If you can waterproof, try one of these...http://www.himodel.com/electric/HiMo...-200A-BEC.html

[krusty]

I was running a x- 440 prop when I killed the Hydra this is the third time killing that ESC. The drive line and motor are spining freely and I just got those batts and I have two sets. I like the ESC I have a tube of that epoxy from off shore for water profing. Any examples of adding water cooling to this ESC?

[domwilson]

DP270 epoxy it up. Sand the top FET's till they are flat. Then add one of these... http://www.offshoreelectrics.com/pro...prod=etti-a044
with some dielectric thermal paste, available here or at Radio Shack. Then heatshrink it all together.

[krusty]

ya thats the epoxy I have, now for the stupid question when you say to sand the fets is that just to ensure that no epoxy is on them beore i put the heat sink paste on with the cooling ? or to remove the old paste?

[domwilson]

After you apply the epoxy, it will leave the tops of the FET's uneven. You want to remove the epoxy from the tops of the FET's so you will have a flat contact surface for the thermal paste and cooling plate.

[krusty]

Thanks the ESC is on the way, who knows I might be able to use the cooling off of the Hydra. This is an asumtion, I remove the stock cooling fins then encase the ESC in epoxy and then clean up the fets for the paste and cooling plate and heatshrink it and of coarse break 50 mph.

What strikes me as weird is that the Hydra was not incased in anything just heatshrink. It is very modular

[domwilson]

Just the top heatsink. Some have just dremeled out a couple of fins and soldered, JB weld, whatever, cooling tubes into place. It's up to you. I just did one myself with the cooling plate.