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| Deterrent |
 Posted: 02/01/2008 11:47 AM Post subject: Chamber fan broken |
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Private
Joined: 21 Jan 2008
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Have you guys ever had trouble with chamber fans breaking? After a few shots a corner segment of my fan broke off.
Is this normal? Do you guys use metallic fans or something? And how do you guys mount the fan in place? I shaved the corners of my fan and crammed it into the chamber. Maybe the explosion makes the chamber expand, then contract, destroying my fan? If this is the case, what would be a better way to secure the fan in the chamber? |
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| MaxuS the 2nd |
| Posted: 02/01/2008 12:16 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
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| You just used a proper flimsy fan, maybe breaking the corners off to make it fit made some hairline cracks. |
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| jrrdw |
| Posted: 02/01/2008 12:16 PM Post subject: |
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Donating Moderator
Joined: 16 Nov 2005
Posts: 3043
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| Wow it's busted all rite! Thats the first I've seen anybody has shown. It's possible for the chamber to expand a little. You may have hit the nail on the head. |
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| Deterrent |
| Posted: 02/01/2008 13:18 PM Post subject: |
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Private
Joined: 21 Jan 2008
Posts: 15
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| MaxuS the 2nd wrote: | | You just used a proper flimsy fan, maybe breaking the corners off to make it fit made some hairline cracks. |
I seriously doubt it. The plastic was incredibly tough. And I didn't break pieces off it, I carefully sawed the extra flaps off the corners (which had nothing to do with the places at which the frame broke). |
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| Novacastrian |
| Posted: 02/02/2008 8:32 AM Post subject: |
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Bloody Aussie
Joined: 11 Aug 2007
Posts: 1622
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| Yeah, maxus is right in a way, the plastic seems to be as brittle as an old mans walking stick. |
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| psycix |
| Posted: 02/03/2008 18:50 PM Post subject: |
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Major General
Joined: 25 Jun 2007
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It COULD be the expanding / shrinking chamber, but I think the fan matarial would expand/shrink aswell.
Maybe it was forced to move a lil inside the chamber, but the friction broke of one of the corners? |
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| TwitchTheAussie |
| Posted: 02/03/2008 18:53 PM Post subject: |
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Brigadier General
Joined: 06 Feb 2007
Posts: 889
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| Id just say you got a dodgy fan my friend. Brittle. |
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| Carlman |
| Posted: 02/03/2008 19:42 PM Post subject: |
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The Aussie
Joined: 24 Nov 2007
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| psycix wrote: | | It COULD be the expanding / shrinking chamber, but I think the fan matarial would expand/shrink aswell. |
Th fan material would not be subject to the sudden increase in pressure as it does not have to contain it. the fan's shape should stay the same.
My bet is with a defect fan.
EDIT: TWITCH your back mate  |
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| TwitchTheAussie |
| Posted: 02/04/2008 4:45 AM Post subject: |
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Brigadier General
Joined: 06 Feb 2007
Posts: 889
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Yeah. Couldnt resist  |
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| psycix |
| Posted: 02/04/2008 5:34 AM Post subject: |
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Major General
Joined: 25 Jun 2007
Posts: 1442
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| Carlman wrote: | | psycix wrote: | | It COULD be the expanding / shrinking chamber, but I think the fan matarial would expand/shrink aswell. |
Th fan material would not be subject to the sudden increase in pressure as it does not have to contain it. the fan's shape should stay the same. |
Hmm your right about that.
The fan wont change size...  |
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| rna_duelers |
| Posted: 02/04/2008 6:10 AM Post subject: |
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Major General
Joined: 26 Sep 2005
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| Is your ignition source behind the fan or in front of it?Is the fan in the front of the chamber or the rear?It should be at the rear.Because if your ignition source is behind the fan then it basically becomes a projectile within the chamber. |
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| Deterrent |
| Posted: 02/04/2008 13:08 PM Post subject: |
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Private
Joined: 21 Jan 2008
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| Yes, the ignition was about 1cm behind the fan. |
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| rna_duelers |
| Posted: 02/04/2008 17:02 PM Post subject: |
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Major General
Joined: 26 Sep 2005
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That could be a cause of the damage to your fan,as the flame front pressure wave moves towards the barrel,in short.Your fan has pressure build up on one side and damaging it.
How to fix this?Move the ignition point to in front of the fan and have the fan as far back in your chamber as you can. |
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| Deterrent |
| Posted: 02/05/2008 7:27 AM Post subject: |
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Private
Joined: 21 Jan 2008
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| rna_duelers wrote: | That could be a cause of the damage to your fan,as the flame front pressure wave moves towards the barrel,in short.Your fan has pressure build up on one side and damaging it.
How to fix this?Move the ignition point to in front of the fan and have the fan as far back in your chamber as you can. |
How does the pressure destroy the fan?
And isn't placing the ignition at the back better in terms of power? |
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| psycix |
| Posted: 02/05/2008 8:03 AM Post subject: |
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Major General
Joined: 25 Jun 2007
Posts: 1442
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| Deterrent wrote: | | rna_duelers wrote: | That could be a cause of the damage to your fan,as the flame front pressure wave moves towards the barrel,in short.Your fan has pressure build up on one side and damaging it.
How to fix this?Move the ignition point to in front of the fan and have the fan as far back in your chamber as you can. |
How does the pressure destroy the fan?
And isn't placing the ignition at the back better in terms of power? |
Some people believe that, but I dont , a spark gap in the middle of the chamber is the most effective, I believe.
That way you create the most effective flamefront, burning the fuel as fast as possible. Unless you use DDT....
And isnt placing the fan at the back better in terms of effectiveness and durability? |
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