Notional System - Shark I

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Notional System - Shark I

• David J. Hewitt
• Team Leader Silver Bullet
• UAH IPT Team 2 Summer 2004
• Email DHewitt57_at_att.net
• Phone [phone]

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Overview

• Objectives
• This is a systems level summary of the Shark I
  bullet designed in the Summer 2004 IPT course by
  team Silver Bullet.
• Scope
• This presentation provides a perspective and
  context for the current evolution of the project.

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SILVER BULLET

Review of Shark I IPT TEAM 2 Summer 2004
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Requirements-Baseline Threat

• Baseline Threat- A 240mm rocket flying head on at
  an altitude of 100-1000m at a speed of 500m/s,
  launched from a range of 8km
• ECAP weapons system must have a 90 probability
  of killing multiple incoming targets with a
  maximum of 10-15 shots for each threat
• Effective range of 0.5-4km
• Launch platform, transportability, storability,
  maintainability, and availability must be similar
  to conventional 40mm ammunitions
• Operational in all weather condition environment

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Operational Scenario
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Silver Bullet Objectives

• Integrate each members skills and knowledge to
  function as a successful team
• Meet or exceed baseline threat requirements
• Function as a team to design a simple and
  affordable solution to combat the proposed
  baseline threat
• Present the design to the Review Board

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Final Concept Shark I
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Final Design Features

• Aerodynamically de-spun using 4 deployable fins
• Fin actuation provides maneuvering control
• Thermal battery powered
• MMW beam rider seeker and guidance

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System Interaction
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Power Requirements
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Power

• SAP-12116 manufactured by Eagle- Picher
  Technologies, LLC.
• Requires 25000 Gs for G-shock Activation (.064
  sec rise time)
• Dimensions 1.453(36.6mm) length x .880
  (22.3mm) diameter
• Supplies 15-20 Volts
• Exceeds CDD 20 year shelf life

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Seekers and Guidance

• MMW beamrider guidance system
• Beam-riders are effective against short and
  medium range incoming targets
• Ka band tapered rod antenna at 35Ghz located in
  the rear of the ECAP

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Controls
Aerodynamically despun using four fins.
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Controls-Airfoil Design
Clipped Double Edge Airfoil -This design
minimizes drag effects of shock waves at
supersonic speeds
Fin dimensions 5 mm thick, 14 mm tall, and have
a mean chord length of 72 mm (6065-T6 Al)
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Controls-Stowed Fins
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Controls-Fin Deployment
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Launch Platform

• Bofors L70 40mm Gun System
• Time proven design
• 24 round magazine
• upgrades compared to the Bofors MK3 assumed (101
  round capability)
• able to intercept a minimum of 2 threats assuming
  a minimum of 10 shots per kill
• Effective range greater than 4km
• Approximate weight of 5000kg will require a
  tracked vehicle or trailer for transportation

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Advanced Analysis-PRODAS
PRODAS Flowchart
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Advanced Analysis-PRODAS
ECAP Stability Confirmation
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Advanced Analysis-PRODAS
ECAP Drag(Cx0) Vs.Mach Number
ECAP Pitching Moment Vs. Mach Number Note
Negative Values Confirm Stability
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Advanced Analysis-PRODAS
ECAP Trajectory Analysis Results
In the summer 2004 analysis, the ECAP was not
able to intercept the target using PRODAS
Simulation, but came reasonably close to the
threat. Due to inexperience and time constraints,
these were the best results obtained.
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Advanced Analysis-PRODAS

• During the Fall 2004 Semester training occurred
  at Arrow Tech, the developer of PRODAS
• More refinements were done with the Shark I
  PRODAS model with what was learned
• Much better results were obtained

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Advanced Analysis-PRODAS
Revised ECAP Trajectory Analysis Results
The Fall Semester analysis showed a remarkable
improvement in performance.
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Ease of Manufacture

• Most internal items are available as
  off-the-shelf hardware
• Manufacturing of the ECAP does not involve any
  non-standard processes or machining practices
• Greatest cost of manufacture will be associated
  with assembly due to the size of the internal
  components
• The Fall 2004 MAE 493 class made a full-scale
  model of the Shark I

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CDD Compliance
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Summary

• The Silver Bullet Team believes in the potential
  for the Shark I design
• Due to time constraints, this design is still in
  its infancy much more analysis is needed
• The Shark I was the baseline design for the 2005
  IPT Student Workshop

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Bibliography

• Beginning-Level References
• Silver Bullet UAH IPT Summer 2004 Team 2 Final
  Report
• www.prodas.com
• www.iptmadness.com

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Glossary
Term Definition
CDD Concept Description Document for UAH Class
ECAP Enhanced Counter Air Projectile
MAE Mechanical and Aerospace Engineering
MMW Millimeter Wave
PRODAS Projectile Design and Analysis System