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Flight Readiness Review: Full-Scale Low Power Rocket Attempts in Hawaii

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This document outlines the flight readiness review for two rocket attempts using K780R and K1000T motors conducted in Hawaii. The tests focus on parachute deployment, including both drogue and main parachutes, along with avionics functionality. Despite stable flight conditions, the first attempt on March 13, 2011, encountered an unsuccessful main parachute deployment. The second attempt on March 20, 2011, achieved drogue deployment but resulted in water recovery due to an excursion out to sea, damaging avionics and resulting in data loss.

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Flight Readiness Review: Full-Scale Low Power Rocket Attempts in Hawaii

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  1. Flight Readiness Review Team Hawaii

  2. Leo HanoFull Scale Low Power March 13, 2011 Motor = K780R

  3. Leo HanoFull Scale Low Power March 20, 2011 Motor = K1000T

  4. Overview

  5. Parachutes • Drogue • 42in • 83.59 ft/sec • Main • 144in • 22.45 ft/sec

  6. Dual Deployment Avionics test • Main Charge • Primary: 5.5 g • Back up: 5.5 g • Drogue Charge • Primary: 4 g • Back up: 4 g

  7. rail Exit Velocity • 65.2 ft/sec • Reach safe speed at 66.34 inches

  8. FSLP First attempt 3/13/11 • Possible causes: • E-matches pulled through • Improper packing of the main chute • Insufficient time to deploy main chute • Rocket was stable throughout flight • Drogue was deployed at apogee • Main event • No main deployment • Unsuccessful

  9. Fslp second attempt 3/20/11 • Rocket stable throughout flight even with the wind gusting between 12-19mph • Deployed drogue at apogee 12.5 sec after lift off • Main deployed shortly after • Drifted out to sea • Water recovery • Damaged avionics • Loss of data

  10. Payload – Hula-hoop 2 - Block Diagram

  11. Hula-hoop2 Subsystems • Controller • Main serial interface • Debug port serial interface • LEDs and switch • Data storage • Sensors & Analog to Digital Convertors (ADC) • Temperature • Acceleration • Magnetic field • 12 bit ADC • Power

  12. Controller Data Storage Micro Technology 24LC512 EEPROM features: 8 pin DIP capacity of 65,536 bytes or 64 Kbytes per chip I2C interface Memory sizes Model A: 4 chips for 256 Kbytes Model B: 2 chips for 128 Kbytes • Parallax Basic Stamp 2p features: • 24 pin DIP • 8 code and/or data segments at 2 Kbytes per segment • 16 digital Input/Output interfaces • Debug and program upload interface • Voltage regulator at +5 Volts

  13. Sensors Temperature: Acceleration: Parallax’s Freescale MMA7455 Accelerometer features: wider than usual 8 pin DIP SPI or I2C interface – using SPI 3 axis acceleration choices of 2g, 4g or 8 g – using 8g 8 bit or 10 bit resolution – using 8 bit Digital Output Data stream 8 bits in 8 bits out • National Semiconductor LM34 features: • 3 pin TO-92 case • Analog Output • Connected to ADC#2

  14. Sensors: Magnetic Field • Custom built inductors • Analog Output • 3 coils will be used, one for each axis (X, Y and Z) • Each coil will have its own 4 resistor network that will be connected to ADC#1

  15. Analog to digital convertors: 12 bit ADC #1 Analog to digital convertors: 12 bit adc #2 Micro Technology MCP3202 features 8 pin DIP 12 bit resolution 2 single ended input channels SPI interface Data stream 4 bits in 12 bits out • Micro Technology MCP3208 features • 16 pin DIP • 12 bit resolution • 8 single ended input channels • SPI interface • Adjustable voltage reference (.25 to 5 volts) while keeping the device’s power supply at 5 volts. Will be set at 1 volt • Data stream • 6 bits in • 12 bits out

  16. Mahalo Questions?

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