## Bullet trajectory

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### Bullet trajectory

So, I am helping my 5th grade son with his science fair project and he wants to test this question: "How does change in trajectory angle effect bullet/target accuracy?" We have the ability to set this up at our local gun club, but I am at a lose as to the best procedure/methods to use in order to produce "science fair" worthy data. Any direction on this subject would be greatly appreciated. His question is due on Nov. 15th and all his research by the end of the month.
Thanks,
s
tshildreth

Posts: 3
Joined: Fri Nov 02, 2012 10:10 pm
Project Question: How does the change in trajectory affect the accuracy of a bullet?
Project Due Date: November 15th, 2012
Project Status: I am just starting

### Re: Bullet trajectory

tshildreth - Trajectory is the path of flight that a projectile takes. The trajectory is acted on by several variables. As the bullet leaves the barrel it is likely still accelerating as a result of built up gas pressure in the barrel. After leaving the barrel, it is immediately acted on by gravity and starts to drop (and this rate of drop accelerates) at a very specific rate. As it follows the trajectory, air friction will cause it to slow. As it slows, and as the force of gravity causes the drop to accelerate, the trajectory curve becomes much more dramatic. I'm not sure what you mean by trajectory angle and it's effect on accuracy. None of these dynamics really have anything to do with accuracy. There is a lot of material available on the internet that will explain all of this and more. Here is a very short explanation of simple bullet ballistics that can be a starting point. I think you have to define what you mean by accuracy before trying to apply predictable ballistic/trajectory elements to your experiment.

http://www.centerfirecentral.com/articles/traj.htm

Rick Marz
rmarz
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Joined: Sat Oct 25, 2008 1:26 pm
Occupation: Technology Consultant
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### Re: Bullet trajectory

Ok. I agree there are too many variables on trajectory. How about this one... Does bullet quality effect accuracy? Same gun, same shooting situation and distance with the only difference being the quality/cost of the bullet. Or is that hard to quantify? Would it be better to change bullet length (22 short vs. 22 long) and test how that effects accuracy?
Thank you so much for helping us narrow this down.
tshildreth

Posts: 3
Joined: Fri Nov 02, 2012 10:10 pm
Project Question: How does the change in trajectory affect the accuracy of a bullet?
Project Due Date: November 15th, 2012
Project Status: I am just starting

### Re: Bullet trajectory

http://www.extremeaccuracy.net/bullet-info/

Rick Marz
rmarz
Expert

Posts: 496
Joined: Sat Oct 25, 2008 1:26 pm
Occupation: Technology Consultant
Project Question: n/a
Project Due Date: n/a
Project Status: Not applicable

### Re: Bullet trajectory

Excellent! Thanks so much for your help. We are very excited to go forward with this project. We'll keep ya posted.
tshildreth

Posts: 3
Joined: Fri Nov 02, 2012 10:10 pm