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Form 1 can finished

Posted: Tue Feb 15, 2011 1:57 pm
by dod996
Thanks for the help from everyone on this site.

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Re: Form 1 can finished

Posted: Tue Feb 15, 2011 1:59 pm
by dod996
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Re: Form 1 can finished

Posted: Tue Feb 15, 2011 4:55 pm
by Transformers0704
looks very nice. how many shots have you put through your can. looks clean. Do post some videos. :D

Re: Form 1 can finished

Posted: Tue Feb 15, 2011 7:54 pm
by Wicked
Sweet!! Really nice work. Got video?

Please give us the details: weight, length, diameter, materials, construction hints, ect.

Re: Form 1 can finished

Posted: Tue Feb 15, 2011 8:16 pm
by SRM
Last time I saw that it didn`t have a center hole. How the hell did you get the hole in strait?

Re: Form 1 can finished

Posted: Tue Feb 15, 2011 9:27 pm
by daviscustom
Is that the core you posted as an oops and then decided it might be ok?

Re: Form 1 can finished

Posted: Tue Feb 15, 2011 10:11 pm
by SRM
It is, and thats the cf that disipates heat!

Re: Form 1 can finished

Posted: Wed Feb 16, 2011 8:42 am
by dod996
SRM,

You wouldn’t believe how clean a hole a solid carbide bullet can punch.

Re: Form 1 can finished

Posted: Wed Feb 16, 2011 9:16 am
by daviscustom
53 gigiwatt krypton atomizer :mrgreen:

Nice can by the way..a little flashy for my tastes, but still, well done...does it work as good as we thought it might?

Re: Form 1 can finished

Posted: Wed Feb 16, 2011 9:36 am
by dod996
Weight : about 7 oz
Length : 6"
Dia : 1.060"
Core and end cap material: 6al-v4 titanium
Split tube material 304SS
Outer tube material filament wound carbon fiber

I have around 100 rounds thru it so far. In the picture above there was probably 20 rounds thru it.

It seems quite but I want to compare it with some production cans.

Re: Form 1 can finished

Posted: Thu Feb 17, 2011 1:19 pm
by rcrdps
SRM wrote:It is, and thats the cf that disipates heat!
If ya'll don't mind me hijacking slightly. This has been bugging me off and on, so I asked my brother who is a chemical engineer. Here is our email chain snipped for addresses and extra content, and re-arranged to be in chronological order from top to bottom:

From Me:
I keep seeing people say that carbon fiber transfers heat better than aluminum, and I find it kinda hard to believe? Do you know?

My first thought would be that it acts more like plastic, and would be an insulator. That might be why they think it transfers heat better. They think that since it doesn’t get hot, then it must be transferring the heat,….

From Him
Thermal conductivity of aluminum is around 250 W/m-K. For carbon fiber, it's more like 50 W/m-K through the thickness. In-plane conduction would be much higher, but conduction in that direction is not really important for most uses of cf.

Now carbon nanotubes are an entirely different beast. They can have huge conductivity, depending on how they are constructed.

From Me:
Figured it be something like that. It’s generally “laminated” with epoxy, so that’s plastic. Since it is “Carbon”, I figured it might have some conductivity, but the heat has to go through the epoxy first.

From Him:
Ideally, there's a lot more carbon than epoxy. 50 W/m-K is actually really large. Most plastics have thermal conductivities smaller than 1 W/m-K.

<snip>

EDIT: This was a conversation when I was looking at handguards that are often made out of aluminum. Just looked up steel. Carbon steel is real close to Carbon Fiber. Carbon fiber would indeed have better conductivity than Stainless Steel. So the assumptions are true in some cases.

Re: Form 1 can finished

Posted: Thu Feb 17, 2011 2:25 pm
by jimmym40a2
VERY nice.....

Re: Form 1 can finished

Posted: Thu Feb 17, 2011 2:44 pm
by SRM
http://jenseprecision.com/abs-barrels.html

When they first started, they used the wrong weave and it insulated the barrel.

It just looked like the same stuff to me is all.

Re: Form 1 can finished

Posted: Thu Feb 17, 2011 3:20 pm
by rcrdps
You might be on to something there. I'd assume the nice "carbon fiber look" that most stuff is made out of, would insulate, or at least only be marginally better depending on what you're comparing against. But this does appear to be different, and my brother did say if it's running in the right direction that it is much better.

dod996, where did you source the tube from? I've thought of doing carbon fiber before on a monocore for lightness, but if you can use a certain tube and gain heat transfer, that'd be awesome.

Gene

Re: Form 1 can finished

Posted: Thu Feb 17, 2011 9:37 pm
by SRM
[quote="dod996"]Outer tube material filament wound carbon fiber

The fiber length is what allows heat transer. The strength is another matter. Must be reinforced I would guess.

Re: Form 1 can finished

Posted: Fri Feb 18, 2011 1:29 am
by 2Munkeez
WOW! i don't think i own a gun pretty enough to wear something so sexy :lol: seriously, that is one good lookin can. it's completely different than what i thought i was going to see, when i came into the "home grown" section.

Re: Form 1 can finished

Posted: Fri Feb 18, 2011 1:16 pm
by dod996
I bought this tubing from Ebay and used it on a barrel that I turned down to 3/8" and built it back up by winding carbon fiber and epoxy.
To cover my hand winding I used this tube then used the leftovers for the can.

The tubing is filament wound at what looks like 45-55 degrees which is ideal for high strength tubing or so I'm told.

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