Flight Readiness Review University of Alabama in Huntsville Charger - PowerPoint PPT Presentation

NASA USLI Flight Readiness Review University of Alabama in Huntsville Charger Rocket Works March 13, 2019

Agenda  Introductions and Team Overview  Mission Objectives  Changes Since CDR  Vehicle Overview  Payload Overview  Program Management  Safety  Testing and Verification  Outreach  Budget 2 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Introductions  Zachary Ruta, Program Manager  Hope Cash, Safety Officer  Marcus Shelton, Chief Engineer  William Hankins, Vehicle Lead  Colton Connor, Payload Lead  Tanner Schmitt, Deputy Safety Officer  Brooklyn Kirkwood, Vehicle Safety Lead  Connor Gisburne, Payload Safety Lead  Dr. David Lineberry, Faculty Advisor  Jason Winningham, NAR/TRA Mentor, Level III Certified  Bao Ha, Graduate Student Teaching Assistant 3 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Mission Statement The objective of the Charger Rocket Works (CRW) team is to construct a safe and successful Level 2 high powered rocket with deployable unmanned air vehicle as a payload through applying engineering judgement and skills. Additionally, CRW will engage with the community in STEM education events and promoting rocketry to diverse groups. 4 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Mission Objectives Vehicle : The rocket will deliver the payload to an altitude of approximately 4800 ft., descend safely and within the Mission Performance Requirements set by NASA, and be recovered in a reusable state. Payload : The payload will deploy from the rocket, fly to a target location, and drop a beacon on target zone all while meeting the desired NASA requirements for the USLI competition. Safety : Comprehensive safety methods will be implemented in all aspects of fabrication, testing, and launches of hardware using in-depth analysis and written procedures and checklists. Outreach : The CRW team will meet a minimum of 200 students through hands- on activities as per the request of NASA and will promote STEM and rocketry to diverse groups. 5 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Vehicle 6 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Vehicle Overview Parameter Value Vehicle Length 124in Body Tube Diameter 6in Vehicle Weight 50.095lb Motor Selection L1420R Predicted Apogee 4982ft 7 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Vehicle Overview Drogue Deployment at Apogee 3  Drogue deployment charge at apogee  Backup drogue deployment charge at apogee plus 1 sec Main Deployment 4 2 Launch  Main parachute deployment  Motor ignited at 600 ft AGL  Vehicle accelerates  Backup main deployment at 550 ft AGL Pre-Launch 1 Landing 5  Rocket assembled  Payload deploys  Rocket placed on pad  Rocket recovered 8 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Vehicle Changes since CDR  Key Switch has been added to nose cone such that nosecone avionics can be powered on externally  Conserves battery life and ensures signal will not be lost during flight  Tracker bracket redesigned to allow more mounting surface for the avionics  Is now a 3D printed part  3D printed component infill increased from 25% to 35% to increase strength 9 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Nose Cone and Body Tube  Body tube cut from 60in G12 fiberglass tube via wet-saw  Metal tipped 4:1 ogive nosecone purchased from Madcow  Bulkhead and key switch holes hand drilled 10 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Upper Airframe Bulkheads Nosecone Bulkhead  Upper airframe bulkhead functions as recovery retention system and payload attachment bulkhead  Drogue parachute attaches to upper airframe bulkhead via eyebolt  Nosecone Bulkhead functions as nosecone avionics and payload attachment bulkhead  Diameter: 6 in Upper Airframe Bulkhead  Aluminum thickness: 0.25 in  Fixed to body tube with six #4-40 screws  CNC machined from 6061-T6 Aluminum 11 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Coupler  Coupler 13 in. long with 1 in. switch band cut from excess body tube  G12 fiberglass bulkhead holes drilled using 3D jig and drill press  SPST key switches used to power avionics on pad  Keys not removable when system powered off  Key locks printed to prevent accidental powering during transport to pad 12 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Lower Body Tube  Cut from a 60in G12 fiberglass tube on a wet- saw  Fin slots cut using plunge router  Holes for bulkhead and fin can were hand drilled 13 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Aft Bulkhead  Functions as recovery retention system  Main parachute attached via eyebolt  Diameter: 6 in  Aluminum thickness: 0.25 in  Fixed to body tube with 6 #4-40 screws  CNC machined from 6061-T6 Aluminum 14 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Fins and Fin Can  Fins:  Adjusts CP for stability  G10 fiberglass sheet  Cut with wet saw  Through-wall mounting  Installed with eight #4-40 bolts per fin  Fin Can:  3D printed in-house with PLA  Fixed to airframe with eight #4-40 bolts 15 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Thrust Plate  Transfers force from motor  CNC machined from 0.190 in. 6061-T6 Aluminum 16 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Retention Ring  Load Path:  Boost phase  Motor case  Thrust plate  Body tube  Coast phase  Retention ring retains motor  3D printed from ABS plastic  Retained the motor during coast phase of the flight  Attached to the fin can using 2 #4-40 screws 17 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Recovery System  Drogue Parachute  FruityChutes CFC-18  1 in. tubular nylon, 50 ft.  Terminal Velocity: 83.1 ft/s  Main Parachute  FruityChutes IFC-144  1 in. tubular nylon, 50 ft.  Terminal Velocity: 11.2 ft/s 18 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Avionics  Two Stratologger CF  Drogue: Apogee / Apogee + 1s  Main: 600 ft. / 550 ft.  Inertial Measurement Unit (IMU):  Features accelerometer, gyroscope, magnetometer, and pressure sensor  Located in nose cone  Featherweight Raven3 altimeter  Records pressure (altitude), acceleration, and temperature  Located in nose cone 19 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

GPS Tracking  XBee-Pro S3B Radio Transmitter with Antenova GPS  Located in nose cone  Powered by CR123 lithium ion battery  Used with success on previous CRW flights  Transmitting frequency: 902 to 928 MHz  Transmits to distances up to six miles away 20 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Mass Statement and Margin  Wet Mass: 50.095 lbm  Burnout Mass: 39.995 lbm  Difference from CDR estimates: 2.874%  Some 3D prints strengthened with greater infill percentage  Added nose cone tracker and avionics assembly 21 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Flight Profile  Predicted Apogee: 5012 ft.  Max Velocity: 582 ft/s  Max Acceleration: 249 ft/s 2  Velocity off Rail: 57.6 ft/s  Thrust to Weight Ratio: 6.91  Time of Flight: 99.7 s  Time to Apogee: 18.4 s 22 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Flight Profile  Variable Wind Speeds:  5 MPH: 5009 ft.  10 MPH: 5021 ft.  15 MPH: 5006 ft.  20 MPH: 4963 ft. 23 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Trajectory Verification  Rocksim: 5012 ft.  OpenRocket: 4963 ft.  RASAero II: 4999 ft.  Custom Code: 4982 ft. 24 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Trajectory Verification  Variables:  Motor Impulse (±1%)  Rocket Mass (±0.25 lbf)  C D Error (±0.04)  Temperature (±15 o F)  Wind Speed (±2 MPH)  Normal Distribution  Average: 4982.7 ft.  27.5% fall outside CRW Requirement  0% fall outside SLI Requirement 25 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Stability Margin  CP location: 91.1 in.  CG location: 77.2 in.  Stability Margin: 2.25 26 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS

Kinetic Energy Vehicle Component Mass [lbm] Kinetic Energy [lbf-ft] Upper Airframe 17.56 34.20 Coupler 4.35 10.47 Lower Airframe 15.85 30.87 27 Wednesday, March 13, 2019 UNIVERSITY OF ALABAMA IN HUNTSVILLE | CHARGER ROCKET WORKS