How Much PSI Is Needed to Launch a Fishing Lure 38.5 Meters with an Air Cannon?

In summary, the amount of PSI required to launch a fishing lure 38.5 meters with an air cannon depends on factors such as the weight of the lure, the design of the cannon, and aerodynamic principles. Calculations involve determining the necessary force to overcome gravity and air resistance, which can be estimated using physics equations related to projectile motion. Ultimately, experimentation may be necessary to fine-tune the pressure settings for optimal performance.
  • #1
GinaMitchell
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Homework Statement
Hi - I built an air cannon to launch a fishing lure for my science fair project. The air cannon launched a 1/4 oz lure 31.4 meters. Based on this, I calculated the initial velocity to be 17.54 m/s using the formula for range of a projectile. I want to be able to launch the lure 38.5 meters. I am trying to figure out how much PSI I would need to launch it 38.5 meters. Does anyone know an equation I can use to predict this? I used 100 PSI to launch it 31.4 meters. The barrel of the air cannon is 25 inches.
Relevant Equations
range of a projectile
Hi - I built an air cannon to launch a fishing lure for my science fair project. The air cannon launched a 1/4 oz lure 31.4 meters. Based on this, I calculated the initial velocity to be 17.54 m/s using the formula for range of a projectile. I want to be able to launch the lure 38.5 meters. I am trying to figure out how much PSI I would need to launch it 38.5 meters. Does anyone know an equation I can use to predict this? I used 100 PSI to launch it 31.4 meters. The barrel of the air cannon is 25 inches.
 
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  • #2
I would first look at small changes in angle (45 deg might not be optimal when drag is included) and small changes to barrel length. This would be interesting data and you might be surprised. Is the lure "self sealing" in the barrel? How about a sabot? 100psi is the typical max for an amateur system.
 
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FAQ: How Much PSI Is Needed to Launch a Fishing Lure 38.5 Meters with an Air Cannon?

What is the required PSI to launch a fishing lure 38.5 meters with an air cannon?

The exact PSI needed can vary based on several factors such as the weight and aerodynamics of the lure, the barrel length of the air cannon, and the efficiency of the air release mechanism. However, a rough estimate would be around 80-100 PSI for a standard fishing lure.

How do weight and shape of the fishing lure affect the required PSI?

The weight and shape of the fishing lure significantly impact the required PSI. Heavier lures need more pressure to achieve the same distance, and more aerodynamic shapes require less PSI to travel 38.5 meters. Generally, a streamlined, lighter lure will need less PSI compared to a bulky, heavy one.

What role does the barrel length of the air cannon play in determining the PSI?

The barrel length of the air cannon influences the acceleration of the lure. A longer barrel allows the air pressure to act on the lure for a longer period, which can reduce the required PSI for the same distance. Conversely, a shorter barrel might require higher PSI to achieve 38.5 meters.

How can I calculate the exact PSI needed for my specific setup?

To calculate the exact PSI needed, you would need to consider the mass of the fishing lure, the barrel length, the drag coefficient, and the efficiency of the air cannon. Using physics equations that involve projectile motion and fluid dynamics, you can derive a more precise PSI value. Alternatively, experimental testing with a pressure gauge and distance measurements can help fine-tune the required PSI.

Are there any safety considerations when using high PSI in an air cannon?

Yes, safety is paramount when using high PSI in an air cannon. Ensure that all components of the air cannon are rated for the intended pressure to prevent ruptures or failures. Use proper protective gear, follow safety protocols, and conduct tests in a controlled environment to minimize risks. Always start with lower pressures and gradually increase to find the optimal PSI.

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