HiModel 4s-8s 200 amp esc

[Lasse Baardseth]

I just blew up two of the Himodel 200a 4-8s on 8s!

Both had DP270, etti coolingplate and etti capbank and i did not use the internal BEC.

The first just stopped after one day of racing, the second one blew up on pluginn.

The setup is Delta force 32" knockoff, 8s 5000, NEU 1521 1,5y prop prather 230 speed 58 mph.

The ESC was nice and cool all the time.

I think i might pushed it too far on my setup?

Next time i think i will try the Turnigy marine 240HV.

[785boats]

I havent seen this thread for a while but now its back I thought I would update you on my luck with it on 8s, a couple of months ago I got all my electronics wet which was no problem for the ESC or RX as I waterproofed those myself but foolishly I trusted the MFGs conformal coating on the UBEC, to avoid that being the end to my day I removed the UBEC put the red wire back in the HiModel's lead and carried on running, I have now had about a dozen runs on 8s using its internal BEC and no longer plan on replacing the UBEC.

I've said it before somewhere (can't remember which thread) that todays ESCs use a voltage switching circuit for the internal BEC, as opposed to the old linear regulator circuits of a few years ago. They don't create anywhere near the heat being over 90% efficieni. Whereas the old regulator circuits were only 60%-70% efficient at best. They just got too hot with anything over 4s.
The Hi Model should have no problem dropping 8s voltage down to 5V.
I always use the internal BEC in all mine with confidence. Although I have never tried an 8s setup. Only up to 6s.

Here's a story that might interest some of you.

http://www.rcgroups.com/forums/showthread.php?t=1274741

All the best.
Paul.

[ray schrauwen]

Aaaaaahhh, thats different. You can only take so much from a single "P" setup and voltage decreases underload significantly on some 1P setups.

Any data from your runs by eagle tree, really curious to see what your underload V & continous current values are ??!!

[NativePaul]

8s1p, I just looked at another one I have that isn't cooled or waterproofed yet and the FETs are FAG21AX FDD 8896.

[ray schrauwen]

I havent seen this thread for a while but now its back I thought I would update you on my luck with it on 8s, a couple of months ago I got all my electronics wet which was no problem for the ESC or RX as I waterproofed those myself but foolishly I trusted the MFGs conformal coating on the UBEC, to avoid that being the end to my day I removed the UBEC put the red wire back in the HiModel's lead and carried on running, I have now had about a dozen runs on 8s using its internal BEC and no longer plan on replacing the UBEC.

Truly amazing when the fets are rated for 30Vdc ?? or at least someone said they were FDD8896 which have a 30Vdc limit...

Kudos sir.

8S1P or 8S2P?

[Alfa Spirit]

I made water cooling with an ETTI plate, her is the result

[Jeff Wohlt]

I bought a can of the spray version and will try it soon. I also think it is clear and not black.

[NativePaul]

I havent seen this thread for a while but now its back I thought I would update you on my luck with it on 8s, a couple of months ago I got all my electronics wet which was no problem for the ESC or RX as I waterproofed those myself but foolishly I trusted the MFGs conformal coating on the UBEC, to avoid that being the end to my day I removed the UBEC put the red wire back in the HiModel's lead and carried on running, I have now had about a dozen runs on 8s using its internal BEC and no longer plan on replacing the UBEC.

[ksm2001]

Does anyone have any details about this cooling plate and the "liquid plastic" used to waterproof the HiModel ESC?

Peter and I use Plasti-Dip, Steve sells it here on his site but I see he is out of it right now, we buy the product locally here from Home Hardware and it comes in various colors. When using it though paint it on with a brush, it will take a couple coats to seal all the parts.

I use Peters cooling plates on my Himodel 200's and have to agree they are one of best.

Ken

[Jesse J]

I have gotten pretty good coolers at a great price from Scotty (Skunkworks)

Plasti-Dip works great and may be very similar to what Peter uses.

[Lasse Baardseth]

This is what i mean.

[Lasse Baardseth]

If you look at the FET's, some have extra solder where it looks like there should have been a gap between the different parts.

Do you see what i see, or am i just to worried?

[ray schrauwen]

I have one, not used it yet in a boat but, I've tested it.

I think I had to play with my radio for it to handle throttle on my 3PM FM pistol. Thought I needed a Pi-Stix but, was able to set it up.

The boat it is for isn't done yet.

Very robust (big)

[mappo]

himodel

Turnigy Monster-2000 200A 4-12S Brushless ESC

Any one familiar with this Esc from Hobby king?

[ray schrauwen]

I just bougth two of the 4-8s 200a from Himodel.

As i was popping of the cooling plate i noticed som odd soldering on both ESC`s.

Is this normal?

Yes.

This is the Bec model that has motor leads soldered to top. The non-Bec which I have recommened more solders them on the bottom which is better IMO.