Thanks had a look at those piston valves not easy to make seen it done with a can but parts to make up the pilot system and the piston valve are very hard to come buy in our country what's the I can just take out the ball valve and replace with a sprinkler valve but I could only find a 1" will that ...

Thanks Doctore

When you say 3 to 1 you mean barrel should be 3 meters to one meter chamber ??? Bit blonde Also to late to modify to sprinkler as its all glued up
Also due to increasing the barrel size would be hard to transport and store as I stay in a flat and space is a issue could I then ...

i built this guy recently for launching out baits
but do not feel it is powerful enough could be that the barrel to chamber ratio is of
chamber is 1 meter x 3'' diameter
current barrel is 1.2 meters by 2'' diameter
im no rocket scientist
pipe used is rated to 16 bar pressure
if only tire ...

Need help wanted to know ideal barrel length
Currently attached pic
Chamber is 3.28' long x 3" diameter
Want to hit 6-10oz projectiles at +- 300yards
Current barrel is 3.98' x 2" diameter

Hi I'm new to potatoe launchers

Have made one and need assistance

Chamber = 3.28 ' long x 3" diameter

What would be ideal barrel length to use 10oz projectile at over 300 yards ???
Trying to post a pic but not allowing me to