brushless 1/5 4wd conversion about to begin! couple questions. - Page 12 - RC-Monster Forums

Ryu James · 07.23.2009, 12:59 AM

Quote:

Originally Posted by KaztheMinotaur

Do you think the 25C 5000mah Zippy batteries would be adequate? Or would the 30C be safer?

how much are they? i am not familiar with the zippy packs. i have both 25c and 30c packs and cant tell much of a difference. btw, if you are interested i have a couple of 10s 25c 5000mah thunderpower packs. they run $560 new but selling for $225. let me know if you have any interest.

but i think you would be good with either one.

Ryu James · **castle hydra hv 240 is here! -** 07.23.2009, 02:58 PM

WOOHOO!! got my speed control today. here are some pics. i also found a little ABS box at radioshack that will work perfect to mount my esc and rx in. i will mod it so a fan will sit directly over the esc and hopefully that will be sufficient to keep it cool. it is normally cooled by water. i plant to make a new center top plate out of carbon that is large enough to mount the esc to.

been working on the swaybars. should finish that today and will post pics.

brushlessboy16 · 07.23.2009, 03:05 PM

Thats a big speed controller!

As for cooling ideas.. maybe you can take off the water cooling plates and put heatsinks. Maybe take an aluminum box and fill it with mineral or silicone oil and submerge the esc 100% of the heat energy transfered away.
maybe just sync the esc to the chassis with thermal paste.

Because with the water cooling plates you just dont have the surface area of a heatsink to dissapate the heat energy...

just my .02

nitrostarter · 07.23.2009, 03:24 PM

Well the cooling plates are inbetween layers of boards sitting on top PLENTY of FET's. He would have to unsolder the layers to pull the cooling plates out.

I think it will be fine. I don't think your amp draw will be as much as the controller is rated for. SO i don't see it being a problem. The cooling plates are ALU as well so they will inturn act as heatsinks anyways.

aqwut · 07.23.2009, 04:13 PM

Ryan, she's beautiful isn't she.... :)

Ryu James · 07.23.2009, 04:42 PM

thanks for the ideas. nitro is right. there are 4 alu. plates inbetween pc boards and the alum. plates are connected to alu. pipes extending in both directions which are normally used for water cooling. i thought about just removing the shrinkwrap so that a fan can put air around all the aluminum but i am not going to do any mods yet until i try it out. i dont want to void any warranty if i dont need to. Mike has said the the hv 180 has been working fine on the brushless baja he built so i am hoping this works out. if its running too hot then i will look at doing some mods to cool it down. i am thinking with one fan on each the motor and esc i will be able to use gearing to get both temps within the ideal range. i hope so anyway.

BL_RV0 · 07.23.2009, 05:35 PM

Hi Ryan, since you bought that box at radioshack, it includes a metal and plastic top, right? If you remove the water cooling bits, you can thermal epoxy the esc to the metal Case top, then epoxy a large heatsink to the other side of the top.

Ryu James · 07.23.2009, 07:34 PM

Quote:

Originally Posted by BL_RV0

Hi Ryan, since you bought that box at radioshack, it includes a metal and plastic top, right? If you remove the water cooling bits, you can thermal epoxy the esc to the metal Case top, then epoxy a large heatsink to the other side of the top.

yes, that is right. it has both a plasic top and an aluminum top. however, after working on it today it appears the stock rampage rx box is gonna work better. it is slightly larger and will fit both my esc and rx comfortably and will be easier to mount. the RS box was just too tight of a fit. it would have looked real clean though. plus, with the rampage box i will be able to water proof it i think, even though the esc is already water resistant.

ha, i just said "box was too tight of a fit."

BL_RV0 · 07.23.2009, 10:13 PM

Oh, get your mind out of the gutter young man!

emaxxnitro · 07.23.2009, 10:16 PM

maybe you should ask pdelcast what he thinks... after all he designed it

Overdriven · 07.23.2009, 11:19 PM

If you're going to have a fan on the esc, have it blow into the alum pipes, simpliest and probably most effective. Careful wire routing would be required for this to be most effective. Removing the shrink will probably help a little too, and I wouldn't think it would void the warranty unless you solder on it. Besides, wouldn't running it in a land vehicle without the water cooling void it because it's not being run within it's design constraints?

On the more radical side I'm curious how effective a heat pipe system would be. It's what almost all pc cpu coolers are going to now. But that'll definitely void the warranty, and the aluminium pipe don't dissipate heat as well as the copper ones used in cpu coolers.

emaxxnitro · 07.23.2009, 11:47 PM

Quote:

Originally Posted by Overdriven

If you're going to have a fan on the esc, have it blow into the alum pipes, simpliest and probably most effective. Careful wire routing would be required for this to be most effective. Removing the shrink will probably help a little too, and I wouldn't think it would void the warranty unless you solder on it. Besides, wouldn't running it in a land vehicle without the water cooling void it because it's not being run within it's design constraints?

On the more radical side I'm curious how effective a heat pipe system would be. It's what almost all pc cpu coolers are going to now. But that'll definitely void the warranty, and the aluminium pipe don't dissipate heat as well as the copper ones used in cpu coolers.

heat pipes! thats it! 8 heat pipes on 1 heatsink. perfect

Ryu James · 07.24.2009, 05:52 AM

what are heat pipes? are you guys just referring to the 8 pipes on the esc?

what about this? i thought if i could find some kind of little pump i could mount a small nitro tank on the chassis with some coolant/water in it and use fuel line to pump through the esc pipes and back into the nitro tank. i just dont know where i would find a tiny pump like that. i am just gonnna stick with the fan but this would be kinda cool.

OZ-RUSTLER · 07.24.2009, 06:22 AM

Quote:

Originally Posted by Ryu James

i just dont know where i would find a tiny pump like that.

How about a washer bottle motor from a 1:1 car, pumping coolant?

florianz · 07.24.2009, 07:25 AM

cool stuff, each layer has it#s cooling.

one possibility would be to remove the pipes, grind the remaining surface flat, and put a heatsink on each side (w/ thermal glue). but this would probably void the guarantee. and is too much work.

or you could get yourself one of those water cooling systems for rc-car motors. yes, I'm not kidding!! I've seen them already a couple of times on the internet. It's mor or less the same like 1:1 cooling systems. and you have plenty of space on your car. water is actualle much better for cooling then air. here we go:http://www.rcuniverse.com/forum/m_5375253/tm.htm
get that and you have the most unique bl-converted truck on the planet!

an other strange but probably effective Idea:
you get massive aluminium (or copper)-sticks which fit tightly into the tubes, probably together with some thermal paste. the sticks would be longer than the tubes, like that you have more surface. maybe you make the ends of the aluminium sticks flat, so you can glue a cpu-heatsink on it. like that you have much more surface for cooling purposes. and it can be removed easely.

or you put a little fan on each side, right on the tubes. so the fans cool - instead a heatsink - the tubes. it would look a little bit like those mgm esc's.

florian