HiModel 4s-8s 200 amp esc

[lomdel]

Yes the top of the fets , doesn't matter what is there conductive or non conductive if you don't glob it on there is no chance of contaminating any circuits . epoxy steel is magnetic so be carefull there

So you mean, just put a small drop of epoxy steel on top of each smal FET? Then press the heatsink onto that without messing any epoxy onto the circuit board... Is epoxy steel thermally conductive enough?

[Punisher 67]

Yes the top of the fets , doesn't matter if its conductive or non conductive if you don't glob it on there is no chance of contaminating any circuits . epoxy steel is magnetic so be carefull there

[lomdel]

Isn't the epoxy steel conductive? To what did you glue it, to the FET's?

[Punisher 67]

I hate to be a show-off but this is what I did to my Himodel 200 , glued the heatsink with epoxy steel

[lomdel]

The HM 200A is by no means magnificent, but a quick cheap way to get back on the water while saving for another Etti.
Skipskip, that 580A probably refers to something else. No ESC for general brushless RC use can handle that load to my (limited) knowledge...

I added another two tubes to the heatsink. See pic...

[Punisher 67]

Can you post a picture of this magnificent unit , send it to me I'll bet you I can blow it up in 30 seconds

.......................................

200 amp esc's are pretty much what most anyone will need unless you go to the mega sized 3060/3080 lehners under 9 turn or the 2215/2230 1Y's , there is no RC HOBBY esc that I have ever seen that will take that kind of heat with a continuous draw , schulze is coming out with a 40/300 that is rated for 400amps spikes

what is the Novak rated for continuous usage........................

[skipskip]

probably dumb question but?

hey this is probably a dumb question but i have a novak GTB brushless esc and on the spec it says 580 ap for burshless motors and 1620 a for brushed and will handel 3s lip 7c nic it makes my truck haul ive been looking and at these esc u guys are talking about and a 100a and 250a rating sounds kind of wusy to me
or are these esc rated diffrent please educate me i would much rather buy a 50 dollar esc than a 220 dollar one thnx

[lomdel]

Cooling them!

I just watercooled mine with brass tubes in the heatsink fins AND a small 3Racing fan on one side to aid airflow between the plates. See pics... One question, though : should the fan blow air into the ESC or extract air from it??
I am going to waterp[roof it with CorrosionX and leave it unwrapped. The only problem being, keeping the heatsink attached onto the FET's...

[Ub Hauled]

They are step by step with the Tx... I am yet to test them since I had radio problems
when I went to the pond on Sunday morning.

[lomdel]

Any updates on these ESC's? How are they programmed, by beeps, a card or PC interface?

[planezero]

Recon I could get another one of these ESCs and follow Berry's wisdom, need me an amp meter - how do you measure the amperage while the boat is going 40 mph?

When you bring your boat in you can read the maximum amps that passed through the logger off a lcd display. For the Eagletree you have to get the display seperately. Here you can see me checking mine in the beginning of the vid to give you an idea.

My avatar is what is left of my SV27 after bringing it in too quickly and prying it out of the lake bank.

[ReddyWatts]

FeCalc will not give an exact real life reading, but will give you a good estimate of which prop to start testing with and keep you out of trouble when buying equipment.

http://forums.offshoreelectrics.com/...ead.php?t=5757

[Jesse J]

Berry, what the heck is your avatar? is that a wrecked bow and some bondo bandaids?

[Jesse J]

No parallel, just two packs in series, so 5000 mah truly. Is that 4466 a lot of pitch? KB45, kinda like an Octura X445? Ohhh, is that 44mm diameter and 66mm (2.6") of pitch? if so that is twice the pitch of the X445... YIPES. I need to get on that FeCalc.

Recon I could get another one of these ESCs and follow Berry's wisdom, need me an amp meter - how do you measure the amperage while the boat is going 40 mph?

[planezero]

Just some advice to avoid smoking stuff...

Start with small props, take temp readings a after a few passes and move up in prop size if everything stays cool.
Get an amp meter (watts-up meter or better an Eagletree logger) if you really want to know whats going on in your boat, they are great tools.