ESC help...

[SweetZ28]

:) Hi can anyone please help me out here ..I have a 50amp brushed and a 100 amp brushed boat ESC....what size motors could they go down to?
both types 600 type motors and # type turn motors example 10 turn?
:D THANKS

[Steven Vaccaro]

Rating a esc by turns is only a guildline. Its a poor way of rating them for boats. IE you could run a 19 turn with a x435 and it runs great at in the 20 or so amps. But put a x447 on it and watch the esc and motor explode. You really need to gauge your escs by the motors efficiency ratings. Get one that runs at double the ratting for a cushion. For example I run a 700sc which I prop to run at 35amps with a 60amp jeti. For years with no problems.

[SweetZ28]

Hi Steve So a 50amp esc propped corectly can run a 700motor?...i was thinking about running a better 600 type motor than the 550 motor so the 50 amp ESC would be ok....the 100 amp should run a 700 easy then?

THANKS

[pompebled]

Hi Steve So a 50amp esc propped corectly can run a 700motor?...i was thinking about running a better 600 type motor than the 550 motor so the 50 amp ESC would be ok....the 100 amp should run a 700 easy then?

THANKS

Even better; I've ran a competition mono on 12 cells with a 700 motor, turning a 45K prop on a watercooled 35A Jeti electric flight ESC, for years, never any problems.

Watercooling is mandatory or it would shut down thermally getting out of the hole, drawing 25-30A. The pic shows the simple rectangular brass tube under the shrinking tube.

Once on the plane, the 20-25A was not really an issue for this ESC.

Regards, Jan.

[Mich. Maniac]

I figure this would be a good title too. I have 2 brushless esc's and need to add water cooling, I have cooling bocks and all and was wondering If someone could fill us in on what to remove. how to adhere and what to re-wrap when done?

[part time]

use either the epoxy in the store to seal the esc or acylic conformol coating. and the electrical grease thats in the store also to make sure there is good heat transfer between the fets and the cooling plates and shrink wrap

[Mich. Maniac]

HUH?So I pull off original shrink and remove alum plate from black things called fets? then use conformal coating over entire board? and stick new cooling plate to that epoxy?

[Fluid]

Skip the conformal coating if the ESCs are already waterproofed. The coating really reduces the effectiveness of the cooling plates - which do little anyway. Castle went to a different FET and coating to improve the watercooling's effectiveness on the Hydras because they knew that the original Barracudas were not helped much by the water.

On most ESCs I believe you will have better cooling with a small computer fan because the air reaches all the FETs, not just the ones in contact with the plates. And it carries away more heat until the hull tpmeerature gets too high. With LiPos that is not a problem. :) Just wire the fan to the power leads on the ESC board. I use 12volt fans up to 18 cells - but you could use 6-volt fans wired to the recriver pack. :)


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[SJFE]

For the jolly cat I'm am going to use a cooling block on the top and bottom of the esc, remove the center plates and fan cool the inboard fets. The esc will be about the size of a cell phone when I'm done but I don’t care. Plenty of room in a cat. I love over cooling electronics. My last gaming desk top had 2 separate liquid cooling systems. One for the cpu and another for the video card and primary hard drive. I said liquid because I didn’t use water. I used a synthetic coolant adapted from a motocross application. One day I would love to build an onboard self contained cooling system with real radiators fed by intakes and backed up with fans....That would be sooooo trick:D.

[Piranha2]

Now that someone mentioned hydras....does anyone know if they are pistol compatible? waterproof? I just bought a hydra240 and wonder if it will run cool with 16 cells and a 9 turn?

[Jeepers]

do you mean a 9XL? if so that motor on that speed control 16 cells should run nice and cool.

[Piranha2]

yes, a 9xl, would you happen to know if the hydra is pistol compatible?

[Jeepers]

the 2 barracuda's I have are pistol compatable so my guess is that those hydras are the same. it would be weird for castle to make them stick radio compatable, as most boaters probably use pistol radios anyway.

[Fluid]

The Hydras are marine controllers and are designed to use common marine radios - i.e. pistol transmitters.


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[Piranha2]

Now Fluid, if I were to assume that, then I would assume that all marine ESC's are waterproof.......almost like assuming that because I own an FE I can go fast....I just watched Darin Jordan's vid and his driving skills are nothing short of controlled chaos....my skills are just plain chaos.