Quote:
Originally Posted by MathGeek
We really want a design to get baits consistently out to 600' from the beach.
We've worked a lot with combustion driven launchers both aerosols (hair spray, rem oil, Brut anti-perspirant, etc.) and pure fuels (acetylene, propane, butane, methanol, ethanol), and we've even published several papers. The bottom line with combustion driven launchers is that even when you carefully measure the fuel and have a uniform projectile, you get wide variations in velocities which translate to wide variations in distance. Yes, these things sometimes will give you a 600' flight, but you will also get a lot of 200-400' distances.
When you're launching a mullet frozen in a cylindrical ice "bullet" with a hook and a sinker, you really want a consistent distance, because each launch attempt uses up a carefully prepared frozen bait.
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oh, ok
I guess a 12v air pump isn't much different then having a bag full of cans of hair spray & such to carry around
did you look into those pneumatic pumpkin cannons that have booster tubes to increase the speed as it goes down the barrel?
from what I saw they had internal triggers that when the projectile passed the next stag it triggered the next tube (positioned at a 45* angle) to open, thereby maintaining and increasing the back pressure so it never stops accelerating and leaves the barrel with much greater velocity then the one time release of pressure of a single stage. the guy said it doubled and tripled the distances they got.
I saw it on tv show about the pumpkin chucking competitions but I cant find a link to anything about his design though.