[NSRCA-discussion] Heat Sinks

[Jay Marshall]

Yep, except that would require another POWER to operate them!

 

Jay Marshall 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Pavlick
Sent: Friday, August 01, 2008 9:07 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Heat Sinks

 

You didn't fly fast enough to heat them up! <LOL> Seriously, LiPOs perform
best within a certain temperature range. You electron heads should look into
something that can keep the batteries within this range. Maybe Peltiers?
These are nice because thay can generate heat OR provide a cooling effect.
If anyone wants to explore this I'd be glad to help.

 

John Pavlick

JEREMY CHINN <lagrue at hotmail.com> wrote:

The assessment on my Kudzu at the Nats was that my batteries never even got
to optimum operating temperature...... 


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From: jpavlick at idseng.com
To: nsrca-discussion at lists.nsrca.org
Date: Thu, 31 Jul 2008 22:12:06 -0400
Subject: Re: [NSRCA-discussion] Heat Sinks

Sounds heavy. Don't electric airplanes have trouble making weight (except
for Dave Lockhart's of course)? What are you guys doing for letting air in /
out of the fuse. Without proper airflow, even a good heat sink won't work.
Actually wouldn't it be better to make some kind of (light weight)
thermostatically controlled cooling system? Cold LiPOs don't make optimum
power.

 

John Pavlick
http://www.idseng.com <http://www.idseng.com/> 

----- Original Message ----- 

From: Earl Haury <mailto:ejhaury at comcast.net>  

To: Discussion List, NSRCA <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Thursday, July 31, 2008 9:49 PM

Subject: [NSRCA-discussion] Heat Sinks

 

We all tend to mount E batteries on some sort of wooden / carbon / nomex
shelf and tie them down with Velcro or a clamp plate - none of which are
very good at transferring heat. Possibly we could improve heat transfer from
the batts to the cooling air by using aluminum, or better yet - finned
aluminum heatsink material for the shelf / clamp. 

 

I've spent a fair bit of time trying for find appropriate heatsink material
online - something 4" long x 3" wide with a high count of thin,  maybe 1/4
high, fins might work. Unfortunately, there's tons of heatsink material
available from Newark, Mauser, etc. but it's difficult to find the right
stuff - especially material light enough for our use. The closest I've come
is Thermaflo # E1243, but I'm lacking a small quantity source. 

 

Anybody work with this stuff & have recommendations or sources?

 

Earl


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