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has anyone tried barrel porting

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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has anyone tried barrel porting

Unread postAuthor: feathers » Wed Jul 08, 2009 2:22 am

has anyone ever tried drilling porting in their barriel or will it shred the potato
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Unread postAuthor: inonickname » Wed Jul 08, 2009 2:28 am

Muzzle brakes.

Yep, the main purpose would be for aesthetics but in higher performance cannons it will reduce projectile climb, tumble and recoil if built correctly. Barrel crowning is also a good addition.

A series of holes won't wreck a potato, but more aggressive porting definitely can. I had a muzzle brake for my newest cannon, though you were lucky if half the qev even got out of the barrel it was so aggressive.

(400 psi didn't help either)
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Unread postAuthor: feathers » Wed Jul 08, 2009 2:31 am

i just have a very simple pvc grill starter gun and its really loud to shoot i thought about copying the porting on my paintball barrel, but my friend told me it would shred the potato
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Unread postAuthor: inonickname » Wed Jul 08, 2009 2:36 am

feathers wrote:i just have a very simple pvc grill starter gun and its really loud to shoot i thought about copying the porting on my paintball barrel, but my friend told me it would shred the potato


Just post a picture and it will be easy for us to tell you. A series of holes in the barrel wouldn't matter much.
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Unread postAuthor: UKSGC » Wed Jul 08, 2009 3:40 am

Rag is the muzzle break king. He put me on to the idea and I use them all the time. I have noticed an increase in accuracy but I am not sure about anything else.
This is the first launcher I used it on.

http://www.uksgc.co.uk/forums/index.php?showtopic=1681
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Unread postAuthor: Technician1002 » Wed Jul 08, 2009 4:09 am

Used them on our t shirt launcher. Reduced end for end tumble which improved range and accuracy. Did not hurt the apples and oranges we launched from the larger barrels. (spuds too small for the 3 inch.) A little sanding to soften the edge of the holes helps.
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Unread postAuthor: Hubb » Wed Jul 08, 2009 7:11 am

I wrote a book about 'em (along with other barrel stuff). It's in my sig.
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