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A nice chamber fan I found...

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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A nice chamber fan I found...

Unread postAuthor: Blitz » Sun Apr 13, 2008 7:18 pm

They're kind of hard to find nowadays, since most people are interested in quieter computers (Not something I was ever concerned with, since my computers are in a rack). I found four of these things while rummaging through some of my old computer parts -- we dubbed these things "the woodchipper" because of its high RPM (5700RPM)

Image

I could have swore these things had ball bearings, but it does say it's DC Brushless. Anyway, they move 80CFM, so they'll find a new home inside my 6" dia chamber. :) They're 80mm x 38mm.
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Unread postAuthor: brother361 » Sun Apr 13, 2008 7:47 pm

damn good find
good luck with the 6 inch gun
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Unread postAuthor: brogdenlaxmiddie » Sun Apr 13, 2008 7:58 pm

I have one of those but it runs on AC power... what would the best way to convert it to DC use? ( Im no good with electronics like that so any help would be greatly appreciated )
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Unread postAuthor: rp181 » Sun Apr 13, 2008 10:08 pm

you cant convert the motor. AC motors use one coil of wire, dc use multiple.
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Unread postAuthor: Blitz » Sun Apr 13, 2008 11:00 pm

brogdenlaxmiddie wrote:I have one of those but it runs on AC power... what would the best way to convert it to DC use? ( Im no good with electronics like that so any help would be greatly appreciated )


You can't convert the motor. But you can get a power inverter to convert DC into AC -- they're popular in automotive stores, or pretty much anywhere automotive accessories are sold. Check here for more details.

brother361 wrote:damn good find
good luck with the 6 inch gun


Thanks man, appreciate it. I'm actually making a bit of progress.
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Unread postAuthor: starman » Sun Apr 13, 2008 11:35 pm

brogdenlaxmiddie wrote:I have one of those but it runs on AC power... what would the best way to convert it to DC use? ( Im no good with electronics like that so any help would be greatly appreciated )


Be sure whatever fan you put in a combustion cannon chamber is brushless. With brush motors comes sparks between the brushes and the spinning commutator...not usable with flammable gases.

Brushless DC fans will be the more versatile and portable than AC models.
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Unread postAuthor: Blitz » Sun Apr 13, 2008 11:39 pm

starman wrote:
brogdenlaxmiddie wrote:I have one of those but it runs on AC power... what would the best way to convert it to DC use? ( Im no good with electronics like that so any help would be greatly appreciated )

Be sure whatever fan you put in a combustion cannon chamber is brushless. With brush motors comes sparks between the brushes and the spinning commutator...not usable with flammable gases.


Not to mention it could prematurely set off your cannon! :P
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Unread postAuthor: psycix » Mon Apr 14, 2008 6:02 am

5700 RPM?! Whoa
I think the name woodchipper is very aplicapable.

I bet that will mix good enough :)
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Unread postAuthor: brother361 » Wed Apr 16, 2008 3:56 pm

so how far have you come along so far on it
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Unread postAuthor: Blitz » Wed Apr 16, 2008 5:44 pm

brother361 wrote:so how far have you come along so far on it


Well, I acquired a piezo igniter and some 4" schedule 80 fittings for the breech of the gun, as well as a 6" flange... I can finally finish the gluing. Once that's done, I can start fabricating stuff like the spark strip and fan assembly, and what-not.
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Unread postAuthor: brother361 » Wed Apr 16, 2008 6:47 pm

Blitz wrote:
brother361 wrote:so how far have you come along so far on it


Well, I acquired a piezo igniter and some 4" schedule 80 fittings for the breech of the gun, as well as a 6" flange... I can finally finish the gluing. Once that's done, I can start fabricating stuff like the spark strip and fan assembly, and what-not.

sweet sounds awesome
its gonna be a behemoth
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