My Quark Heatsink
 

OK I finally got sick of riding the edge of thermaling my quark all the time so I designed up a simple heat sink that mounts to the motor mount bracket of either the stock emaxx transmission or the gmaxx motor mount. I designed it in solidworks and had the shop at work machine it up for me in one of the cnc mills. Its flat on one side for mounting to the flat back of the quark and has radiator fins and screw holes for mounting (2) 5V 40mm fans. I mounted the quark to it using the termal paste they use for computer chips.

Hope this works....

Heres a few pics.

The mount by itself:
http://i66.photobucket.com/albums/h2...z/CIMG1269.jpg
http://i66.photobucket.com/albums/h2...z/CIMG1271.jpg
http://i66.photobucket.com/albums/h2...z/CIMG1270.jpg

With 2 fans mounted:
http://i66.photobucket.com/albums/h2...z/CIMG1281.jpg
http://i66.photobucket.com/albums/h2...z/CIMG1282.jpg

Mounted up in my e-revo with the quark:
http://i66.photobucket.com/albums/h2...z/CIMG1287.jpg
http://i66.photobucket.com/albums/h2...z/CIMG1288.jpg
http://i66.photobucket.com/albums/h2...z/CIMG1289.jpg

That is beautiful, very professional I like how the heat sink is also the mount for the ESC. What is weird is that it looks similar to the one I just put together for my controller. Especially with the twin fans. I used some memory card heat sinks that cut up to fit the bottom. Then used thermal adhesive to bond them to the ESC. I love when I plug it in. It has a nice hum to it. I keep meaning to post some pixs of it. Maybe I'll get the camera out.

Freaking sexy!!

Does the heat comes from the bottom? How much does it differ, temperature wise?

Definately looks good - the only question is - being that the fans are mounted to the heatsink - if you were to jump or flip - i wonder how durable the fans will be - the blades pop off kinda easily... Any feedback would be awesome - Maybe ill try to make one sorta kinda like it - maybe - Sweet none the less. Now i just have to find someone with a cnc machine...:005:

Very nice. Great work!

wow! nice sink dude, but will that really do anything, heat rises so really the botom of the e.s.c will be cool. Imo?

Let us know how much of a difference it makes on cooling.

The bottom of my Quark is resting on my chassis (Lightning Stadium) and it acts as a huge heatsink. Works brilliantly. The top of the quark is plastic, so only the sides and bottom are metal to put a heatsink on.

You're sure?

I wondered about just mounting the esc to an aluminium chassis with a thermal pad in between,should absorb a little shock and still conduct heat to the chassis.

Yep. I took the plastic cover and sides off and the ESC is made up of a couple layers of stacked boards (like the BK Warriors), but the bottom layer is attached to the case. You can do this too, but be careful because there is a small surface mount capacitor next to the LEDS that can get torn off if you aren't careful.

I've had great results with adding a heatsink as well. My temps went from 140F+ to 110F-115F depending on outside temps and driving.

I didn't open mine up an check, but I read on another thread that this was the case. I believe it was Brian G that opened it up and reported the fets attached to the case w/ thermal epoxy. Also, RC-Monster Mike put a heat sink on his attached to back of the case and reported great success.



Edit: Oops... :010: Cross Post. Thanks Brian.

It would be more layers with the powerfetts then. (like the BK) wonder where the tempprobe is. let's hope it's on the hottest part.

Jhautz,

Great job on the heatsink! Any chance you could have one made for a fellow Chicagoan?

If not, I'll take a stab at making one for myself when time allows. Please let us know how much temps drop with the new heatsink system!

Once again, Great Job!

I was actually looking into having a local shop run a small batch if there appeared to be enough interest.

Let us know how the prototype works, if it works well I'll bet you could line up a few buyers.

Actually, if the mount is fairly generic and easy to mount to a lot of places, maybe there would be a spot here on rc-monster for them? Maybe worth shooting an email to Mike? Just an idea...

Thought about that too.

That is a good idea. Help support the forum. :D
I was thinking of one to mount on the truck to mount a bk or schulze to.

Yeah, me too. It looks like it will work well for all ESCs on trucks with only one motor. I've been looking at my empty motor spot for 2 years now wanting to make up an ESC platform, but never did. I think this would be a great addition to RC-Monster's inventory.

thanks for corriecting me jhautz. LOL short awnser!

Sorry... That did sound kinda smart a_s.:005: Not meant to be.


Well after work tonight I just ran 2 full charges through it using 8000mah 5s setup and Feigao 9XL. Gearing started at 22/70. It was just about exactly 80 air temps outside. Before I plugged anything up and started running I took a baseline reading on the motor and the Quark. Both right about 84.

Started off running easy, then ripped into it after I saw the temps were so low. Didn't matter, ESC was still under 110.:027: The motor temp were getting a little high at 155 or so. After the first pack I changed the gearing up to 24/70. ESC still stayed nice and cool under 110 and the motor temps came down to 135-140 or so. I probably could have gone even taller on the gearing, but that was all I had with me. Toward the end of the second pack I wanted to see if i could get it hotter so I did about 5 minutes of WOT runs back and forth in the taller grass field. I was able to get a reading at 142 right where the wires are attached to the board of the esc, but the aluminum case was still a cool 112.:dft003:

I can't even believe the difference. Not even a hint of thermaling. Thats just crazy compared with the 140+ readings from the aluminum case I was getting consistently before even with the lower gearing and having to stop to let it cool every 10 minutes.

I'm HAPPY:D This is the way its supposed to run.

Sweet. That almost sounded like a sales pitch. :D
It sounds like it made a big difference.

Yeah, now I really want one!:027:

Yea...I was beaming pretty hard.:dft001: I'm just very happy with the results. :)


When i read that Monster-Mike put a heat sink on his Quark and then couldn't make it thermal on the track, I was a little skeptical cuz I've been fighting heat with it since the start. But I was willing to try it, I was just about to drop $335 on a Lehner 1950 to try and keep the system cooler. Now I don't have to. This runs great.

I'd be up for buying one! What's powering the fans?

Ive got em spliced into the output of the UBEC. They are 5V fans I bought on ebay and I'm running them on 6v. Basically just used a splitter at the batt input on the rx and soldered a servo plug on the end of the fan wires. Makes for easy hook up and diconnect for maintenance.

Ive seen people use 12v and runn them right off the battery packs also.

This heatsink is almost exactly what I have planned to offer for this controller. It is the exact same principle as mine(without being an integrated chassis component) and should work on most any vehicle. Adding the holes to mount to the stock maxx motor plate is a feature I hadn't thought of, but it is a nice feature for sure.
The heatsink/fan combo makes a tremendous difference for sure. My controller temps was under 120F after the 15 minute main this weekend - barely warm! Very nice design, Jeff. :)

Mike,

So are you planning on releaseing this soon? I was going to look into having a small batch made for those who were interested. If you are going to be releasing yours soon, then I wont bother. I'm not sure how you have yours configured, but please use the e-maxx motor plate mount idea if it make yours design able to be used in more applications. (like on any truck not using the g-maxx chassis)

I have had good luck with mine also. My temps on my buggy were almost dead on with jhautz. Mine is a little more of a hack job, but it seems to work well. I bought two packages of this memory heatsink (I wanted the fins to run longways) http://www.dealsonic.com/thera1ddrsdr.html . I cut them up and used thermal adhesive to bond them to the bottom of the ESC. Here are a few pixs.

Where are you guys getting the fans???? thanks!

http://www.allelectronics.com/cgi-bi...164&type=store
Can be powered by the UBEC or receiver pack or ESC's BEC. Just needs a connector soldered onto it to plug into the receiver.

I hope mike offers the heatsink soon! Its been hot in TX and my quark isn't liking it too much.

thanks Metalman. I picked up two 30mm 5v, should that be enough air?

Depends on the CFM.

What do you think about a couple of these?

http://www.performance-pcs.com/catal...oducts_id=2428

they would be ok, but you would be better with the one below it.

sorry, that was the one i was referring to.