mapp

Boom! The classic potato gun harnesses the combustion of flammable vapor. Show us your combustion spud gun and discuss fuels, ratios, safety, ignition systems, tools, and more.
fom
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Wed Feb 21, 2007 8:05 pm

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Last edited by fom on Tue Mar 13, 2007 9:04 pm, edited 6 times in total.
SpudBlaster15
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Wed Feb 21, 2007 10:28 pm

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Last edited by SpudBlaster15 on Wed Jul 14, 2021 1:17 pm, edited 2 times in total.
fom
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Wed Feb 21, 2007 10:31 pm

SpudBlaster15 wrote:Looks good, my only suggestion would be to tap the fuel meter fitting through 2 layers of pipe next time, and maybe use a meter that has 2 ball valves, it would be easier to operate, and more accurate.
With a 1/2" to 3/4" bushing it holds in fine, and when it is cold outside I would need multiple shots of Mapp gas because the PSI drops low in the tank, 1 valve works fine for me.
fom
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Fri Feb 23, 2007 12:51 pm

Does Anyone have anything to say?
SpudBlaster15
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Fri Feb 23, 2007 7:41 pm

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nec placerat erat. Vivamus dapibus egestas nunc, at eleifend neque. Suspendisse potenti. Sed dictum lacus eu nisl pretium vehicula. Ut faucibus hendrerit nisi. Integer ultricies orci eu ultrices malesuada. Fusce id mauris risus. Suspendisse finibus ligula et nisl rutrum efficitur. Vestibulum posuere erat pellentesque ornare venenatis. Integer commodo fermentum tortor in pharetra. Proin scelerisque consectetur posuere. Vestibulum molestie augue ac nibh feugiat scelerisque. Sed aliquet a nunc in mattis.
Last edited by SpudBlaster15 on Wed Jul 14, 2021 1:17 pm, edited 1 time in total.
fom
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Sun Feb 25, 2007 7:59 pm

SpudBlaster15 wrote:
fom wrote:when it is cold outside I would need multiple shots of Mapp gas because the PSI drops low in the tank, 1 valve works fine for me.
The steel pipe is of considerably more volume than the hose per any given length, simply extending the pipe a few inches (you can certainly afford to with that long chamber) and using 2 ball valves would increase the meter volume to substantially more than it is now.
Well, I might change it, not sure tho.
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c19o
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Sun Feb 25, 2007 8:12 pm

Nice gun, I like mapp gas
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risto
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Sun Feb 25, 2007 8:31 pm

fom wrote:Does Anyone have anything to say?
nope.

im just messin, looks great!
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Pete Zaria
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Sun Feb 25, 2007 8:47 pm

Nice gun, very well thought-out, very clean construction. Looks a lot like my over/under metered propane gun.

How do you hold it? Are you going to add handles?

Peace,
Pete Zaria.
fom
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Sun Feb 25, 2007 10:51 pm

Pete Zaria wrote:Nice gun, very well thought-out, very clean construction. Looks a lot like my over/under metered propane gun.

How do you hold it? Are you going to add handles?

Peace,
Pete Zaria.
I hold the front on the barrel, then my other hand by the rear where the elblows are. I'm not entirely sure if im gonna make a handle, I might tho.

Do you have a link of your gun? I would like to see it.
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Pete Zaria
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Sun Feb 25, 2007 11:01 pm

@fom
http://www.spudfiles.com/forums/viewtop ... 666&#57666

I'll try to post some better pics sometime soon.

Note, I used zip ties instead of hose clamps - either seem to work fine. I might change to hose clamps when I paint it. I'm going to paint it glossy black - but I'm waiting for it to warm up outside. I'm also going to add a stungun circuit. The BBQ sparker jumps all the gaps on the spark strip and it's never misfired yet, but I want to say I have a 100,000 volt ignition. So stun gun it is.

Peace,
Pete Zaria.
fom
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Mon Feb 26, 2007 8:35 pm

Pete Zaria wrote:@fom
http://www.spudfiles.com/forums/viewtop ... 666&#57666

I'll try to post some better pics sometime soon.

Note, I used zip ties instead of hose clamps - either seem to work fine. I might change to hose clamps when I paint it. I'm going to paint it glossy black - but I'm waiting for it to warm up outside. I'm also going to add a stungun circuit. The BBQ sparker jumps all the gaps on the spark strip and it's never misfired yet, but I want to say I have a 100,000 volt ignition. So stun gun it is.

Peace,
Pete Zaria.
Wow, your gun is insane! Very nice job, it would look awesome with black paint. I would suggest you change to hose clamps, they look better and you dont need to cut (and throw away) when you need to take them off.

Right now im finishing off breech loading for this gun, I will post pics ASAP.
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nuclearspud
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Tue Feb 27, 2007 6:01 pm

I like your gun, I am pretty new on here, however I have some cannons myself, but this is definetly one of the top 5.

Nice clean construction too.
fom
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Tue Feb 27, 2007 6:55 pm

nuclearspud wrote:I like your gun, I am pretty new on here, however I have some cannons myself, but this is definetly one of the top 5.

Nice clean construction too.
wow, top 5, thanks.
Its gonna be even better soon, breech load is almost done, I ran into a few problems.
fom
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Sun Mar 04, 2007 1:15 am

bump
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