First Pneumatic

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
Deactivated 1
Private 2
Private 2
Posts: 36
Joined: Mon Aug 07, 2006 7:00 pm

Sat Oct 21, 2006 6:52 am

In my opinion, you can't go wrong with a big chamber if you have a decent sized air compressor. If all you have is a bike pump, I'd go along with the suggested length from the GGDT. To check for projectile range, click "Tools" (up the top), then "External Ballistics Calculator". If you tick the max range box, it will work out the best angle for you to shoot at if you want a long distance. (Glad someone finally answered your question?)
User avatar
Tyro
Specialist
Specialist
Posts: 154
Joined: Sat Oct 07, 2006 1:03 am
Location: The Land of Plenty! (Aus)

Sat Oct 21, 2006 6:05 pm

my main worry was about the barrel once the air goes throught a smaller hole does it lose power. what i mean is should i have the barrel the same size as the sprinkler valve?
Deactivated 1
Private 2
Private 2
Posts: 36
Joined: Mon Aug 07, 2006 7:00 pm

Sat Oct 21, 2006 10:02 pm

My above post was in reference to frogy's questions. Regarding your question (Tyro) A smaller barrel will restrict airflow, but using a larger diameter barrel will allow the air to loose pressure much faster because of the increased volume. If you have a very long barrel with a small diameter, then you will achieve the highest muzzle velocity (I think, I'm just using logic to explain that, not numbers)
User avatar
Tyro
Specialist
Specialist
Posts: 154
Joined: Sat Oct 07, 2006 1:03 am
Location: The Land of Plenty! (Aus)

Sat Oct 21, 2006 10:11 pm

so same size pipe as the valve would be good, Would 1 metre be enough?
Post Reply