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The L.A.B.A Cannon

The L.A.B.A Cannon. By Shane Reddell and Charlie Albright. What is the L.A.B.A. Cannon?. Long-range Assault Blowgun Apparatus The name really says it all. So don’t stand in front of it. Some Specs. Gun Can handle up to 40 psi of pressure (at least that’s how high we have taken it)

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The L.A.B.A Cannon

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  1. The L.A.B.A Cannon By Shane Reddell and Charlie Albright

  2. What is the L.A.B.A. Cannon? • Long-range • Assault • Blowgun • Apparatus • The name really says it all. So don’t stand in front of it.

  3. Some Specs • Gun • Can handle up to 40 psi of pressure (at least that’s how high we have taken it) • 6’8” in length • Could basically kill anything in its path • PVC chamber, copper barrel • Inexpensive, about $60 (why get a professional firearm and a concealed weapons license when you could build this yourself?)

  4. Specs Cont.’d • Darts • Made of a 2 inch finish nail, a playing card, and decorative beads • Playing card cone provides airtight seal inside the barrel that gives the dart maximum velocity • Has gone completely through multiple targets, such as an apple, a coke can, a soccer ball, and even a ½ inch wooden fence.

  5. How does it work? • The L.A.B.A cannon uses the properties of pressure to fire a dart at mind-blowing speeds. • Pressure flows from the air compressor into the gun, from high to low pressure • After pressure reaches between 20 and 35 PSI inside the gun, the gun can be fired.

  6. Pressure flows from the air compressor into the gun and pressurizes the firing chamber. 140 PSI The pressure is released with the front lever and the flow from high to low pressure propels the bullet forward into the target. 1 PSI 20-35 PSI 1 PSI

  7. Field Testing • We wanted to find a correlation between the pressure inside the chamber and the average velocity of the bullet • Describe Setup • 10 psi = 32.56 m/s, or 72.8 mph • 15 psi = 42.16 m/s, or 94.3 mph • 20 psi = 47.86 m/s, or 107.1 mph • Anyone have an idea of what type of relationship there is between pressure and velocity?

  8. Equation • V = (22.178)ln(P) – 18.33

  9. Why it makes sense • The equation is logarithmic because as we continue to raise the pressure, the bullet will eventually reach a terminal velocity (the asymptote of the graph) where it can go no faster (higher on the graph) • Unfortunately the pressure is way too high for us to try and achieve without the gun exploding into a million pieces.

  10. End • Enough talking about the gun, let’s go see it in action.

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