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| psycix |
 Posted: 04/23/2008 9:33 AM Post subject: One week passed, and the cannon was still fueled... |
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Major General
Joined: 25 Jun 2007
Posts: 1581
58.41 Spud Bux
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Today, I got scared the hell out of me by an unexpected surprise...
It all started last week when I was spudding with my combustion cannon (50mm barrel, double spark gap, chamberfan), wich has metered butane.
At the end of the spudding session the butane tank regulator thingy screwed up again and refused to give pressure.
Screwing around with the thing, I accedentically injected ALOT of butane.
Maybe like 2 times my chamber size.
The cannon was not loaded with ammo.
I clicked the igniter, nothing happened. I took off the end cap for about one second and put it back. Still nothing.
I went home, and put the cannon up straight into a corner.
The next day I smelled butane, and found out it came from my cannon.
I clicked the igniter (yes, I fire blank shots inside my house) and nothing happened.
Today, one week further I was searching for something and stumbled across the cannon. I thought hey, why not click the igniter? 
So I did....
BOOM! 
The cannon went off with all its power. The blast of air shredded a poster on the wall into 4 pieces.
In that week enough butane had escaped and I had a good mix in the chamber and barrel.
The barrel was pointing upwards, a bit like this: /
The muzzle end was about 5 inches from the wall.
I think that the reason for this to happen is that butane is heavier then air. And since the cannon was upwards, it couldnt float out so easy. And thus took a week to mix.
Nobody was hurt, and it didnt do further damage. But it could.
So let this be a warning for you.
Always vent your cannon out at the end of a sesion.  |
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| MaxuS the 2nd |
| Posted: 04/23/2008 11:20 AM Post subject: |
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Colonel
Joined: 19 Jan 2008
Posts: 589
739.23 Spud Bux
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That's just common sense.
You should have thought about the fact that it was still loaded with butane before you left it upright inside your house. |
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| THUNDERLORD |
| Posted: 04/23/2008 11:42 AM Post subject: |
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Loose Cannon
Joined: 28 Mar 2008
Posts: 707
1319.08 Spud Bux
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I want to see a damage shot of that poster
I like your post because it reminds me, Always treat my launcher like it's loaded. It's just tempting to pull the trigger on something that has one.
Luckily, accidents I've had were because I missed something I was aiming at. Like when I shot a blow gun dart through the aluminum door frame. Or shot the arrow through the shed.
Other day I pumped up something too much and a hose went BLAM but it was Cool!!!  |
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| Brian the brain |
| Posted: 04/23/2008 11:56 AM Post subject: |
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Dutch Spud Clan Leader
Joined: 05 Dec 2005
Posts: 1271
2019.35 Spud Bux
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That would not happen with a pneumatic. 
Always...ALWAYS treat spudguns with the respect they deserve.
Guess you know now..
Good of you to warn others though. |
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| biggsauce |
| Posted: 04/23/2008 12:55 PM Post subject: |
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Captain
Joined: 07 Jun 2007
Posts: 314
587.82 Spud Bux
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Had to change yer drawers after that one, huh?
Good to hear nobody got hurt, I guess a lesson learned with a little fear is a well-learned lesson. |
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| Ragnarok |
| Posted: 04/23/2008 13:11 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2054
5220.52 Spud Bux
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| Brian the brain wrote: | | That would not happen with a pneumatic. |
Oh I dunno... if you got the seals right, I could see a pneumatic holding pressure for a week. |
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| Brian the brain |
| Posted: 04/23/2008 13:30 PM Post subject: |
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Dutch Spud Clan Leader
Joined: 05 Dec 2005
Posts: 1271
2019.35 Spud Bux
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He pressed the trigger several times.
A pneumatic doesn't misfire like that.. |
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| Ragnarok |
| Posted: 04/23/2008 14:16 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2054
5220.52 Spud Bux
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| Brian the brain wrote: | | A pneumatic doesn't misfire like that.. |
Well, of course... that's part of the appeal, isn't it? |
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| psycix |
| Posted: 04/23/2008 15:14 PM Post subject: |
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Major General
Joined: 25 Jun 2007
Posts: 1581
58.41 Spud Bux
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It was indeed the misfire that tricked me.
I thought that there was nothing in anymore. Especially, a week later. What would you expect?
But yes, a pneumatic wouldnt have that.
For some reason Im starting to like pneumatics more and more.
I might never construct a second combustion again. (maybe ONE)
For the rest: all combustions that I will build will be hybrids (if I ever make one) |
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| THUNDERLORD |
| Posted: 04/23/2008 15:29 PM Post subject: |
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Loose Cannon
Joined: 28 Mar 2008
Posts: 707
1319.08 Spud Bux
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| psycix wrote: | It was indeed the misfire that tricked me.
I thought that there was nothing in anymore. Especially, a week later. What would you expect?
But yes, a pneumatic wouldnt have that.
For some reason Im starting to like pneumatics more and more.
I might never construct a second combustion again. (maybe ONE)
For the rest: all combustions that I will build will be hybrids (if I ever make one) |
Thinking about a hybrid huh? You should check out this post:
http://www.spudfiles.com/forums/small-engine-parts-for-use-in-t14174.h tml |
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| psycix |
| Posted: 04/23/2008 15:52 PM Post subject: |
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Major General
Joined: 25 Jun 2007
Posts: 1581
58.41 Spud Bux
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Already seen that one.
I even already posted in that thread so you could have known..... |
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| dongfang |
| Posted: 05/08/2008 6:26 AM Post subject: |
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Lieutenant Colonel
Joined: 27 Aug 2006
Posts: 446
1656.71 Spud Bux
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Hi,
I always stored my combustion upright, unloaded and with the fueling end cap in the breech end OFF. For the same reason
Regards
Soren |
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| Tom |
| Posted: 05/08/2008 7:51 AM Post subject: |
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Sergeant Major
Joined: 24 Aug 2007
Posts: 186
65.64 Spud Bux
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| Respect comes from two sides |
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| starman |
| Posted: 05/08/2008 9:00 AM Post subject: |
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Big Daddio
Joined: 12 Dec 2007
Posts: 1330
2422.48 Spud Bux
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 That story tickled me in a 3 stooges sort of way... Thankfully no serious damage was done. Your ears were probably ringing after that little episode. |
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| spudmatic |
| Posted: 05/11/2008 16:43 PM Post subject: |
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Private First Class
Joined: 11 Apr 2008
Posts: 32
85.87 Spud Bux
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| Incidents like that are the reason my cannons are always stored capless. And I would think that this sort of thing shouldnt happen when you also have a fan in your gun . |
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