Aerodynamic Jump and Bullet Stability

This project is to find the center of mass of bullets in order to improve testing procedures for Vista Outdoors. By locating the center of mass we find a correlation between an offset center of mass and irregular bullet paths.

Team Name	Class Accuracy
Duration	Fall 2018 - Spring 2019
Faculty Adviser	Dr. Daniel Cordon
Mentor	Brandon Hilliard
Client	Vista Outdoors
Team Members	Dustin Gross Dustan Paul Geoffrey Wood Atticus Zborowski

Problem Definition

Background

Typical bullet makeup consists of a lead alloy core and a copper alloy jacket. Irregularities in subsurface bullet geometries cause radial dispersion between individual bullets when fired. Current destructive testing methods for bullets do not allow for a direct correlation between measured eccentricities and the radial dispersion of the fired bullets. [If you deconstruct a bullet to measure its eccentricities it is impossible to fire it. Once you fire a bullet its characteristics are modified and original eccentricities are immeasurable.]

Specifications

A device capable of non-destructive testing for center of mass variance to ± .001 inches for bullet diameters from .224 thru .338 inches. The ideal device could detect variance created by the addition of a cannelure or a plastic tip, have the ability to detect voids between jacket and core, and would detect density variations, or voids, within the lead core.

Design

Selection

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Details

We went through the geometry and had wolfram alpha separate out the tipping angle then we used Matlab to solve for the uncertainty.

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Testing

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Team Information

Team "Class Acuracy"
Picture	Biography	Discipline
Dustin Gross	Hometown: Bayview Idaho Graduation Date: May 2019 Future Goals: Board member of a publically traded company Email: gros4217@vandals.uidaho.edu	Mechanical Engineering
Dustan Paul	Hometown: Minnesota Graduation Date: May 2019 Future Goals: Work in Industry Email: pauldustan@yahoo.com	Mechanical Engineering
Geoffrey Wood	Hometown: Rathdrum Idaho Graduation Date: May 2019 Future Goals: Build something and help society Email:wood5752@vandals.uidaho.edu	Mechanical Engineering
Atticus Zborowski	Hometown: Boise, Idaho Graduation Date: May 2019 Future Goals: Become the smartest human ever and conquer the world...or work in industry. Email:Zbor8186@vandals.uidaho.edu	Mechanical Engineering

Document Archive

Project Schedule

Schedule

Meeting minutes

9/11/18
9/20/18
9/28/18
10/4/18