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Chamber Fan ???

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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Chamber Fan ???

Unread postAuthor: Rob748 » Tue Mar 03, 2009 8:24 pm

Ok I tore apart a monitor and found two brushless motors. One is about a inch and a hafl wide and the other is 3 inches. The Smaller chamber fan went inside of the end cap. The 3 inch fan wouldnt fit even with extensive dremmeling, what and where is the biggest fan you can use in a 3 inch chamber ?

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Unread postAuthor: Rob748 » Tue Mar 03, 2009 8:53 pm

Come on. This is like my 3rd post that no body is answering..........
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Unread postAuthor: jrrdw » Tue Mar 03, 2009 9:08 pm

Sometimes it may take a day or two to get responses to questions. No more double posting, be patient.

Also UTFSE and look for the answer yourself, you do own a ruler don't you?
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Last edited by jrrdw on Wed Mar 04, 2009 7:41 am, edited 1 time in total.
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Unread postAuthor: TurboSuper » Tue Mar 03, 2009 9:56 pm

The Pythagorean theorem, as learned in high school, will immediately tell you what fans are suitable for use in a 3" chamber, and which ones aren't.
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Unread postAuthor: jimmy101 » Wed Mar 04, 2009 1:04 pm

Rob748, this isn't a chat room. You expected someone to respond within 29 minutes of your post?

As to the fan...

Do you really want the biggest fan that'll fit in the chamber?

A big fan will vent quicker than a small fan, but, a big fan will probably generate less turbulance during firing than a small fan.

Given that even a small fan will ventilate a standard size combustion gun in nothing flat why even try to jam a large fan in?
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Unread postAuthor: psycix » Fri Mar 06, 2009 3:49 pm

Also UTFSE and look for the answer yourself, you do own a ruler don't you?

UTFSE
Does that stand for: "Use The Fkin Search Engine"?

The 3 inch fan wouldnt fit even with extensive dremmeling, what and where is the biggest fan you can use in a 3 inch chamber ?

Well, any fan just a bit smaller then the 3 inch one, ofcourse!
Just THINK! :wink:
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Unread postAuthor: willarddaniels » Fri Mar 06, 2009 8:35 pm

psycix wrote:
Also UTFSE and look for the answer yourself, you do own a ruler don't you?

UTFSE
Does that stand for: "Use The Fkin Search Engine"?

The 3 inch fan wouldnt fit even with extensive dremmeling, what and where is the biggest fan you can use in a 3 inch chamber ?

Well, any fan just a bit smaller then the 3 inch one, ofcourse!
Just THINK! :wink:


That was my understanding as well.
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Unread postAuthor: TurboSuper » Sat Mar 07, 2009 10:13 am

I think confusion arises because PC fans are measured in LengthxWidth (sometimes depth too). A 3"x3" chamber fan will have a length from one corner to another of 4.24", thus not being suitable for a 3" dia. chamber.
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Unread postAuthor: jrrdw » Sat Mar 07, 2009 9:07 pm

Yes UTFSE stands for Use The freakin Search Engine. Why not take the fan with you to the parts store and hold it up next to the PVC pipe? :shock:
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Unread postAuthor: psycix » Sun Mar 08, 2009 2:51 pm

Or use calipers. Most spudders can't live without em.
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