Longest shot?

[Redcoat]

Furthest shooting a whole potato out of a combustion= about 165m.
It was funny cause it went straight past the target and 4 houses down it splattered all over a real estate sign.

[El Beasto]

Is that a ball valve? You should build a piston valve or even a 2" sprinkler valve would be better then a ball valve.

Yes...it is a ball valve. We never really got to experimenting with any other kind of valves cause we didn't know about them. Where could I get a 2" sprinkler valve? Would it noticably improve performance?

[jackssmirkingrevenge]

Would it noticably improve performance?

Oh you have NO idea!

Yours for less than 60 bucks but I'm sure you can find it for cheaper.

[El Beasto]

Thanks! Are they hard to install? Do you just glue it on and you're ready to go?

[thespeedycicada]

dont worry its very simple but you have to mod it to get the most performance out of it just thread in a blowgun,screw it on to the male adapters on the barrel and chamber and your ready to go! the power increase makes a ball valve look like a nerf gun and oh yeah use lots and lots and lots of teflon tape!

[williamfeldmann]

I used to build a lot of smaller ball valve pneumatic potato guns and we could always clear both goal posts on a football (american for you soccer nations) field at relatively low pressure 85ish psi. I have since moved into tennis balls.

My largest cannon will chuck a weighted tennis ball (I added sand to get the thing to 226 grams or half a pound) around 300 meters. I never accuratly measured but used the old 1 stride = 1 meter guestimate.

[El Beasto]

Yeah I'm scared to go above 80 psi on the schedule 40 6" pvc so that's as high as we're going.

Cicada, thanks for your help! I'll pm you if i need more help!

[DYI]

With a chamber that big, you should extend the barrel to at least 20' to get some real performance.

[El Beasto]

With a chamber that big, you should extend the barrel to at least 20' to get some real performance.

Really? 1:4 ratio works well? Never thought about making it longer...I'll have to try that.

[DYI]

What is the volume of your chamber? I usually aim for .25:1, because I build barrels around a specific chamber, and aim more for power than practicality.

20' was a pretty arbitrary number, but you can't get pieces of PVC much longer than that. Also, C:B ratios are always expressed as _:1, to avoid confusion. As you probably know, the 1 is the barrel.

[Dumbascii]

With a potato, map landmark measured, the Taternator II will go just over 1000' with 2X MAPP, 8' long 1.5" barrel. Beyond that much power, I can't use potatoes because they liquefy. With other projectiles at 3X MAPP or oxy/acetylene, I can go well over 2000' but have not had a chance to do this at the measuring site - I'm hoping to be happily surprised.