SpudFiles

my friend recently made a spud gun (after i showed him mine) and his dimensions are a four in chamber (about 13 in long) and a 2 in barrel that is aproximately 2ft 6in. mine is a 3in chamber (13in long) and an 1 1/2 barrell (4ft long). After testing his, he told me that it fires better thatn mine! Im not really sure how this would work better, so if anyone has any thoughts on the dilema, please reply.

well he has more room in his for a bigger bang hopw that helps

hmm...
3² *13
4² *13

So, he has a 75% higher volumed chamber.

1.5² *48
2² *30

And a 20% higher volumed barrel.

Now, this is going to lead to 2 things: his will be louder (higher volume ratio, and bigger), and he'll have a (30-40%?) higher muzzle energy.
...so, yeah, his preformance is better.

ahh, i see. thanks for clearing things up for me. and ur right, his is louder.

hope that helped

So the bigger the better i geuss u could say