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Rocket Based Deployable Data Network. University of New Hampshire Rocket Cats Collin Huston, Brian Gray, Joe Paulo, Shane Hedlund, Sheldon McKinley, Fred Meissner , Cameron Borgal. 2012-2013 Preliminary Design Report Submission Deadline: October 29, 2012. Overview. Objective

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Rocket Based Deployable Data Network

University of New Hampshire Rocket Cats

Collin Huston, Brian Gray, Joe Paulo, Shane Hedlund,

Sheldon McKinley, Fred Meissner, Cameron Borgal

2012-2013 Preliminary Design Report

Submission Deadline: October 29, 2012

  • Objective
  • Vehicle Design
  • Materials and Justification
  • Vehicle Safety
  • Major Components
  • Recovery Design
  • Payload Design
  • The UNH Rocket Cats aim to create a Rocket Based Deployable Data Network (RBDDN). The objective is to design a low cost data network that can be deployed rapidly over a large area utilizing rockets.
vehicle design
Vehicle Design
  • Vehicle Dimensions
  • 67.75” in length
  • 4.014” Outer Diameter
  • 10.014” Span Diameter
stability margin
Stability Margin
  • Static Stability Margin
    • 1.528
  • Center of Pressure
    • 48.321” from the nose tip
  • Center of Gravity
    • 42.211” from the nose tip
vehicle safety
Vehicle Safety
  • Equipment Concerns:
    • Black Powder
    • Hazardous Materials
    • Motor
  • Precautions:
    • Refer to Material Safety Data Sheet (MSDS) for related material
    • Mentor and safety officer on site for supervision
motor safety
Motor Safety
  • Pre-Launch
    • Appropriate motor selection
    • Full inspection of motor assembly and compartment
    • Safe distance before launch
  • Post-Launch
    • Allow motor to cool before handling
motor selection

Cesaroni Technology Inc. K400-GR-13 Reloadable Motor

    • Total Length: 15.9 in
    • Diameter: 2.13 in
    • Launch Mass: 54.7 oz
    • Total Impulse: 1595 Ns
    • Average Thrust: 399 N
    • Maximum Thrust: 475 N
    • Burn Time: 4 s
    • Thrust to weight ratio: 5.9:1
    • Exit Rail Velocity: 55.5 ft/s

Motor Selection

motor justification
Motor Justification
  • The primary reasoning for this motor choice is to reach the 1 mile apogee goal
  • Sufficient thrust to achieve safe rail exit velocity
  • Iterative approach to select motor based on OpenRocket simulations
  • The size of the motor fits very well in our vehicle design
launch vehicle verification and test plan overview
Launch Vehicle Verification and Test Plan Overview
  • Verification of Vehicle Components
    • Perform tensile testing on all the load bearing portions of the recovery system
    • Perform compression testing on the tubing and all other necessary portions of the vehicle
  • Conducting planned test launches
    • To ensure payload electronics are working
    • Parachutes deploy properly
    • Sustains stable flight
recovery subsystem

3 Event Recovery System:

  • Drogue parachute deployment at apogee
  • Payload deployment at Range Safety Officer announcement
  • Main parachute deployment at 700ft

Recovery Subsystem

vehicle recovery system
Vehicle Recovery System
  • Fully redundant recovery circuit
  • #4-40 nylon screws for shear pins
  • Black powder charges for separation
payload recovery system
Payload Recovery System
  • Ejection charge initiated by signal from ground station
  • Nose cone separates and lands independently with PAR-24 parachute
  • Utilize one way bulkhead to ensure that vehicle recovery system is not compromised
one way bulkhead
One Way Bulkhead
  • Ejection charges will remove bulkhead from only one direction
  • Shear pins to hold in bulkhead
payload design
Payload Design
  • Primary Payload
    • Raspberry Pi
    • Sensor Suite (coincides with SMD)
    • GPS
    • XBee Pro 900
  • Secondary Payload
    • Raspberry Pi
    • GPS
    • Xbee Pro 900
payload verification
Payload Verification
  • Power: Payloads will require power for a minimum of 2.5 hours. Our goal will be to have enough power for 5 hours. The amount of required power will be calculated and tested
  • Data Acquisition: Testing will be done by collecting data from all sensors and analyzing the results
  • Network: Both payloads will be tested by being able to successfully communicate with each other
payload verification1
Payload Verification
  • Data storage: Payloads will be given data to store over the network. Successful storage will be tested
  • Location tracking: Payloads will have a GPS module. Correct location data will be tested
  • Network Range: Payloads will be required to be able to communicate and maintain a network at a distance of 1 mile. Our goal of 2 miles will be tested with a clear line of sight for 2 miles and analyzing signal loss