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Crap!

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Crap!

Unread postAuthor: TwitchTheAussie » Tue Jan 08, 2008 4:41 am

OK I read somewhere on here that 1/2 pipe will fit marbles. It seems it is wrong. I now have 15mm pipe and not 16mm and have to buy ammo for it. So where did I go wrong? Is it 3/4 instead?
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Unread postAuthor: MrCrowley » Tue Jan 08, 2008 4:56 am

Depends what type of marbles. The most common ones are too small for 15mm pressure PVC (paintball type) yet are too big for 10mm copper :)
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Unread postAuthor: jackssmirkingrevenge » Tue Jan 08, 2008 4:58 am

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Re: Crap!

Unread postAuthor: Hotwired » Tue Jan 08, 2008 5:05 am

TwitchTheAussie wrote:OK I read somewhere on here that 1/2 pipe will fit marbles. It seems it is wrong. I now have 15mm pipe and not 16mm and have to buy ammo for it. So where did I go wrong? Is it 3/4 instead?

Meh... in the UK the marbles we have are about 15mm so they're too big for the pipe :?
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Unread postAuthor: TwitchTheAussie » Tue Jan 08, 2008 5:05 am

My standard marble (seeing as I have nearly 2 kg of em) is 16mm.
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Unread postAuthor: Carlman » Tue Jan 08, 2008 5:10 am

i bought some 15mm pressure pvc from total eden and it fits marbles from Toyworld PERFECTLY (takes 5 secs to get 1m down barel). Thebag of marbles said they were 16mm but they must of been infact less than 15mm.

I dont know if that helps but yea, you should be able to find some pipe that will work :D

pS: hows that forum going Twitch? *cougheveryonejoin* :D
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Unread postAuthor: MrCrowley » Tue Jan 08, 2008 5:22 am

Carlman wrote: they must of been infact less than 15mm.


The pipe's nominal diameter is 15mm, it's true diameter is much different.

e.g 50mm pressure pipe has a real I.D Of around 65mm.
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Unread postAuthor: Carlman » Tue Jan 08, 2008 6:01 am

oh well, the point is 15mm pvc pipe fits 16mm marbles perfectly lol
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Unread postAuthor: Hotwired » Tue Jan 08, 2008 10:20 am

MrCrowley wrote:e.g 50mm pressure pipe has a real I.D Of around 65mm.


Over here on good solid earth soil, specifically the UK, 50mm pressure pipe has an ID of 40mm.
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Last edited by Hotwired on Tue Jan 08, 2008 4:54 pm, edited 2 times in total.
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Unread postAuthor: Carlman » Tue Jan 08, 2008 10:25 am

yea now i think about it, when i was carrying home my parts for my gb gun my 40mm barrel fitted in my 50mm pipe with little to spare, so MRC u gots some weird ass pipe :D
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Unread postAuthor: locksmith » Tue Jan 08, 2008 12:20 pm

1/2 inch metal conduit fits standard marbles very well[/img]
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Unread postAuthor: MrCrowley » Tue Jan 08, 2008 4:14 pm

Carlman wrote:yea now i think about it, when i was carrying home my parts for my gb gun my 40mm barrel fitted in my 50mm pipe with little to spare, so MRC u gots some weird ass pipe :D


Well 40mm pressure rated PVC has an I.D of about 45mm, add about 5mm for thickness you get 50mm O.D.

Since we import/co-own the same pipe as you Aussies, your 50mm pipe and 40mm pipe is exactly the same to ours.

There is no way 40mm golfball pipe would fit in 50mm pressure pipe, because Hotwired said 50mm I.D is 40mm.

A golfball has a diameter of 44mm, so that mean your 40mm must also have a 45mm I.D, therefore it simply can't fit, I think HotWired has the weird ass pipe.

So I don't have weird pipe, all pressure rated pipe should be very similar no matter where you go.

You sure that soil pipe is pressure rated HotWired? DWV has very different I.D's and O.D's to pressure pipe.
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Unread postAuthor: grumpy » Tue Jan 08, 2008 4:31 pm

a golf ball wil not not fit standard 1 1/2 sch 40 pipe, but a golf ball will fit in 1 1/2 sch 40 sdr 21 pipe, they both have the same outer dia. . but the inner dia, is different,
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Unread postAuthor: MrCrowley » Tue Jan 08, 2008 4:38 pm

We're talking about Metric pipe, not American.

Pressure Rated 40mm pipe will fit golfballs here, because we have a larger I.D, but the O.D reamins the same as your 1.5" pipe.
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Unread postAuthor: BigGrib » Tue Jan 08, 2008 4:44 pm

grumpy wrote:a golf ball wil not not fit standard 1 1/2 sch 40 pipe, but a golf ball will fit in 1 1/2 sch 40 sdr 21 pipe, they both have the same outer dia. . but the inner dia, is different,


if a golfball will not fit in 1 1/2 sch 40 then what makes you think that it will fit in a 1 1/2 "sch40 sdr21" there is no such think. sch is the wall thickness there buddy. so sch 40 is sch 40. sdr 21 is sch200. that is why a golfball fits because the wall thickness is less than sch40 making the ID bigger.
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