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› Looking for: Kontronik Jive custom heat sink...
09-10-2011 11:22 PM  6 years agoPost 81
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I looked around a little on that website link you gave me, and the price for a single 30mm x 60mm heat sink is $102 USD. OUCH!!!

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09-11-2011 12:11 AM  6 years agoPost 82
prototype3a

rrApprentice

Christiansburg,VA

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A 60x60x15 is only $6 though. I guess cutting it down yourself is more economical.

http://www.micforg.co.jp/cgi-local/...1B-T-02&ptype=2

This one might work well too and you can get it with a thermal tape already installed. It also has holes that might make securing your Jive really easy.

~Drew

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09-11-2011 12:55 AM  6 years agoPost 83
Justin Stuart (RIP)

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Plano, Texas

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I previously found this site. They sell hundreds of different kinds of aluminum heat sink extrusions in various shapes. I enquired about buying a few inches of a certain shape extrusion. They said the minimum order was $2500. Bummer.

http://www.wakefield.com/Catalog/ta...ies=123&order=0

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09-12-2011 07:45 PM  6 years agoPost 84
prototype3a

rrApprentice

Christiansburg,VA

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Are you unable to cut the larger 60mm x 60mm sink down? You can use a carbide tipped chop saw as long as the rake angle is negative and spray a little WD-40 on it to help cool it.

What are your thoughts on the rectangular one intended for power electronics that I linked?

~Drew

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09-12-2011 07:51 PM  6 years agoPost 85
Justin Stuart (RIP)

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Plano, Texas

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I think cutting in half a $6 rectangular heat sink is going to be a definite bargain. I do sincerely appreciate the link you gave me.

I am still going to investigate the "heat pipe" idea that a thermal engineering in Dallas is working on. I am going to pack up a helicopter and drive to his shop to see what ideas he has. I am always interested in new technologies.

But from a simplicity and price standpoint, the LPD60 heat sink cut to size is the very best option yet. It is large enough to eliminate the need for an active fan, allows the use of zip ties to hold it securely, is commercially available, and is cheap. Seems like a real winner. I'm so glad you mentioned it.

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09-12-2011 08:06 PM  6 years agoPost 86
prototype3a

rrApprentice

Christiansburg,VA

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Heatpipes are definitely an interesting bit of technology but you would still need a heat sink for the heat pipe to sink to.

~Drew

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11-02-2011 06:49 AM  5 years agoPost 87
HeliMan Dave

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Suburban Chicago

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Does anyone happen to have a link to a source for the original gold Zaleman heatsink that Readyheli used to sell for the Jive's?

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11-02-2011 06:50 AM  5 years agoPost 88
Justin Stuart (RIP)

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Plano, Texas

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You could get them from NewEgg for $6 shipped until recently when they appear to have become out of stock. This is the part number: N82E16835118002

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11-03-2011 05:00 AM  5 years agoPost 89
benben

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Taipei

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11-03-2011 05:14 AM  5 years agoPost 90
HeliMan Dave

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Suburban Chicago

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Thanks Justin.

Looks like I'll have to use the new model as no one seems to have that Zaleman.

The fan unit that benben posted looks interesting.

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11-03-2011 01:35 PM  5 years agoPost 91
mmc205

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PA - USA

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how about this
http://imgur.com/0ebKV,LuWq0,JGSbz,5IgMU,IKoME
(hit next on imgur to see all images)

i made a prototype but haven't tested it yet. More lenghty post here

http://www.helifreak.com/showthread.php?t=353176

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11-04-2011 05:44 AM  5 years agoPost 92
HeliMan Dave

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Suburban Chicago

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mmc, the problem I see with that design is that the fins are not open on the top. The warm air can not escape as efficiently as a heatsink with the fins open on top.

I'm sure a fan helps either way though.

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11-04-2011 01:25 PM  5 years agoPost 93
mmc205

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PA - USA

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not sure what you mean, there is a hole almost completely the size of the mount where the fan blows air into, and it channels out the sides of the fins.

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11-05-2011 07:55 AM  5 years agoPost 94
HeliMan Dave

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Suburban Chicago

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What I mean is, the fan is sitting on a solid piece of the heatsink and therefore blowing air onto the flat surface of the metal plate.

This does nothing to circulate air past the fins of the heatsink.

Elimination of heat would be much more efficient if the fan was blowing directly at (and therefore through) the heatsink's fins.

This is actually how most fan/heatsink designs are.

See the pics that Justin and eperez74 posted (Traxxas fan) on the first page.

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11-05-2011 01:54 PM  5 years agoPost 95
mmc205

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PA - USA

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if you look closely, there is a large opening right underneath the fan, almost the diameter of the fan. This blows directly onto the heatsink fins from above, and the air exits the sides of the heatsink. Whether its blowing across them (lenghtwise) or from the top, the same end is met. There are a bit less minor losses blowing side to side, but i believe the difference is pretty small.

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11-05-2011 01:59 PM  5 years agoPost 96
mmc205

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PA - USA

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pardon the poor illustration, but you can get the point. The air must go somewhere, and its channeled through all the fin passages, past all the fins, to the ends, thereby gathering heat from them on its way. Not really different than longitudinal designs, except for the fact that the flow originates on the ends instead of on top.

***Logo 600 vbar***Henseleit TDR vbar***

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11-05-2011 02:01 PM  5 years agoPost 97
mmc205

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PA - USA

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also, that traxxas fan is MUCH lower fly than mine. its probably in the neighboorhood of 5-8 CFM, where as mine is 23 CFM at 12 volts. It really does sound like a little ducted fan.

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11-06-2011 05:22 AM  5 years agoPost 98
HeliMan Dave

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Suburban Chicago

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Yes, your illustration is exactly what I mean.

After looking closer at your previous pics, I now see that there is a circular hole right in the center of the bottom block.

Sorry for the confusion. That's what I get for reading the forums late at night.

That design looks very good.

I might be interested in such a piece but only if it's reasonably priced.

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11-06-2011 03:48 PM  5 years agoPost 99
Mojave

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Palos Verdes, Ca. USA

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MMC, I really like the engineering that went into your fan mount. The only issue I see is that it relies on the heatsink to fasten it to the esc. The heatsink is bonded to the stock jive heatsink/plate which is in turn bonded dirctly to the internal components of the esc. Arctic silver is not a structural adhesive and the moment at the bonded joint is very high. The vibration alone could seperate the 2 and cause internal damage to the esc. You might want to find a way to support the fan that doesn't rely on the bonded joint, some sort of strap etc.. Just my .02
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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11-07-2011 12:56 PM  5 years agoPost 100
mmc205

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PA - USA

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mojave, point well taken, i've thought of that myself. If i sold these, i would recommend the entire fixture be strapped down due to he large moment created by the mount fan height. I strapped it down on my TDR to the frame, and its not going anywhere

I did see a mount that encompassed the whole jive, thereby strapping the sink down, but it was also pretty heavy and very expensive. I was shooting for a rather inexpensive, light, mount that would work.

Another question for anyone interested. Would you rather see a fan kitted with these, or just buy the mount and source the fan yourself?

***Logo 600 vbar***Henseleit TDR vbar***

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› Looking for: Kontronik Jive custom heat sink...
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