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STUDENT LAUNCH INITIATIVESTUDENT LAUNCH INITIATIVE2010 – 20112010 – 2011

AIAA OC SECTIONAIAA OC SECTION

PDR PRESENTATIONPDR PRESENTATION

December 14, 2010December 14, 2010

Student Launch Initiative

AIAA OC Section

AgendaAgenda

Introduction of team members (representing 5 Introduction of team members (representing 5 high schools in Orange County California)high schools in Orange County California)

Mission statementMission statement VehicleVehicle

• DesignDesign• GPS TransmitterGPS Transmitter• Dual Deployment Recovery SystemDual Deployment Recovery System• PropulsionPropulsion

Scientific payloadScientific payload

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Mission StatementMission Statement

We, the M1 team from the AIAA We, the M1 team from the AIAA Orange County Section, will construct Orange County Section, will construct and launch a rocket that will reach a and launch a rocket that will reach a mile high while testing hard drive mile high while testing hard drive latency without exceeding mach. latency without exceeding mach. The rocket will include a dual The rocket will include a dual deployment recovery and will remain deployment recovery and will remain reusable.reusable.

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Vehicle – Black BrantVehicle – Black Brant

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• Length 80 inches• Diameter 4 inches• Material: G-10 Fiberglass (body tubes, couplers, fins)• Liftoff Weight: 18.7 pounds• Descent Weight: 15.7 pounds• Recovery: Dual Redundant Electronics• Center of Gravity: 49.85 inches behind the nose tip• Center of Pressure: 58.97 inches behind the nose tip• Stability Margin: 2.29

PropulsionPropulsion

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• Target altitude is 5,280 feet• Vehicle must remain subsonic from launch until landing• Motor must lift almost 19 pounds of vehicle and payload with GPS• Once design was completed launches were simulated using Rocksim• Motor selected is Cesaroni K635 Redline• This selection gives margin if larger or smaller motor is required

MotorWind (MPH)

Total Impulse

Rocket Mass

(Ounces)

Maximum Altitude

(feet)

Max Velocity

(ft/s)Max Accel

(ft/s2)K530 0 1414 295 3281.73 482.43 582.17K630 0 1681 286 4399.61 592.27 582.13K635 0 1973 299 5255.41 657.76 582.18K750 0 2362 309 6455.77 772.76 582.33K590 0 2415 307 6767.42 724.74 652.22

Cesaroni K635 Cesaroni K635 RedlineRedline

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Pro54 1994K635-

17AMotor Data

Brandname Pro54 1994K635-17A Manufacturer Cesaroni

Technology

Man. Designation 1994K635-17A CAR

Designation

1994-K635-17A

Test Date 7/6/2003

Single-Use/Reload/Hybrid Reloadable Motor

Dimensions mm

54.00 x 488.00

mm (2.13 x 19.21

in)

Loaded Weight 1989.90 g (69.65 oz) Total Impulse 1749.50 Ns

(393.64 lb.s)

Propellant Weight 1281.00 g (44.84 oz) Maximum

Thrust

728.70 N (163.96

lb)

Burnout Weight 658.40 g (23.04 oz) Avg Thrust 656.00 N (147.60

lb)

Delays Tested 17 - 7 secs ISP 139.30 s

Samples per second 1000 Burntime 2.66 s

Notes Red Lightning™

GPS TRACKINGGPS TRACKING

Beeline receives GPS positionBeeline receives GPS position• Encodes as AX.25 packet dataEncodes as AX.25 packet data• Sends as 1200 baud audio on 433.92 MHzSends as 1200 baud audio on 433.92 MHz

VX-6R receives at 433.92 MHz and extracts audioVX-6R receives at 433.92 MHz and extracts audio TinyTrack 4 converts audio to digital NMEA location dataTinyTrack 4 converts audio to digital NMEA location data Garmin displays the digital location data on human screenGarmin displays the digital location data on human screen

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Transmitter in Vehicle

• Big Red Bee Beeline GPS• RF: 17mW on 433.920 MHz• Battery and life: 750mAh 10 Hrs• Size: 1.25” x 3” 2 ounces

Ground Station

• Receiver: Yaesu VX-6R• TNC: Byonics Tiny Track 4• GPS: Garmin eTrex Legend

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Dual Deployment RecoveryDual Deployment Recovery

• Used to minimize bring down vehicle quickly and minimize drift• Smaller drogue parachute deploys at apogee• Larger main parachute deploys closer to ground at 900 ft• 24 inch drogue: descent rate 79.65 ft/s with 19 pound vehicle• 96 inch main: descent rate 19.9 ft/s with 16 pound vehicle• Maximum downrange distance is 2500 ft at 10 MPH• Wind margin is 7 miles (within 2500 ft to 17MPH)

Wind (MPH) Wind (ft/s)Drogue

Range (feet)Main Range

(feet)Total Range

(feet) 0 0.00 0.00 0.00 0.005 7.33 403.26 331.47 734.73

10 14.67 806.52 662.93 1469.4615 22.00 1209.78 994.40 2204.1916 23.47 1290.43 1060.70 2351.1317 24.93 1371.09 1126.99 2498.0818 26.40 1451.74 1193.28 2645.0219 27.87 1532.39 1259.58 2791.97

Dual Deployment ElectronicsDual Deployment Electronics

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• Flight Computer #1• G-Wiz Partners HCX 56G• 1.10” x 5.50” 45 grams • Accelerometer based altitude• Pyro output at Apogee• Pyro output at 900 ft altitude• 9VDC at 65ma for 3 hour battery life• Separate CPU and Pyro batteries• Safety interlock switch on body tube

• Flight Computer #2• Perfectflite MAWD•0.90” x 3.00” 20 grams• Barometric pressure based altitude• Pyro output at Apogee• Pyro output at 900 ft altitude• 9VDC at 8ma for 28 hour battery life• One battery for both CPU and Pyro• Safety interlock switch on body tube

Dual Deployment Ejection ChargeDual Deployment Ejection Charge

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• Ejection charge is measured amount of black powder• Black powder sealed in cut-off finger of glove• Glove finger contains black powder and electric match• Electronics fire electric match via pyro outputs• Three shear pins require 35lbs/pin or 105 pounds of force• 4” bulkhead has 12.56 square inches of surface area• Need a minimum of 8.4 psi – we chose 11psi to give safety margin• Main ‘chute uses 1.27 grams of black powder (on-line calculator)

• Body tube with main is 4” diameter x 18” long• Drogue ‘chute uses 0.99 grams of black powder (on-line calculator)

• Body tube with main is 4” diameter x 14 inches long

Launch SimulationsLaunch Simulations

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•

• Simulations were run using Rocksim• Over 100 simulations were run to fine tune vehicle• Dimensions, proportions around avionics bay, weights were varied• Target was a margin of stability between 2 and 2.5• Once vehicle was designed varied engines to attain 1 mile altitude• Verified top speed was still subsonic• Verified range at 10MPH wind• Determined wind margin (OK to 17MPH)

Scientific PayloadScientific Payload

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• Hypothesis is that high “G” forces and vibration will dramatically increase the latency time of a hard disk drive • Equipment

• Small Linux computer to exercise drive• 3.5” Toshiba hard disk drive (specs allow 200g forces for short time periods• G-Wiz partners HCX flight computer to measure the acceleration• LiIon Batteries and DC-DC converter

• Method• Linux script gets a file from the hard drive• The script measures the time that takes• Record the time to the thumb drive• Repeat as fast as possible (approx 100ms)

• Control: Run test while stationary and record• Experiment: Run same test at lanch

Payload/Vehicle IntegrationPayload/Vehicle Integration

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• Vehicle has a single avionics bay• Everything is located in a single 4”x12” coupler• Two electronics sleds are separated by two square, milled pieces of aluminum• One sled holds all recovery electronics together with batteries for recovery and scientific payload• Second sled holds the scientific payload

RisksRisks

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5 The Rocket weather cocks

10 The rocket landing in mud

15 The Drogue ‘chute misfires

20 Tracking device isn’t accurate

25 The altimeter isn’t set to fire the main ‘chute at the correct height

30 The battery(s) of our electronics bay fall1 out

4 The engine “chuffs”

9 The rocket landing in a dangerous area

14 The battery(s) ‘die’ during launch

19 The Main ‘chute misfires

24 The car running over the rocket

29 No recovery system

3 rocket struggles off the launch pad

8 The Linux Computer isn’t

13 The Drogue ‘chute fires at the wrong altitude

18 The Main ‘chute fires at the wrong altitude

23 shear pins aren’t put in place

28 The altimeter isn’t set to fire the main ‘chute

2 The rocket folds upon itself

7 The Payloads HCX isn’t accurate

12 The engine explodes

17 The altimeter isn’t set to fire the drogue ‘chute at correct height

22 Tracking device is damaged in launch

27 he black powder blows the rocket apart

1 rocket misfires6 Payload isn’t set up

11 The rockets fin breaking

16 The altimeter isn’t set to fire the drogue ‘chute

21 Tracking device doesn’t transmit radio waves

26 The electric match doesn’t ignite the black powder

Risks MitigationRisks Mitigation

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5 the design is not over stable

10 Make sure launch site is dry

15 double check programming on the altimeter is correct

20 Make sure tracking device works

25 double check programming on the altimeter is correct

30 Tape batteries and double check connection

4 make sure igniter is all the way in the engine

9 Launch site is clear of all hazardous materials

14 use fresh batteries

19 double check programming on the altimeter is correct

24 hope for the best 29 Double-check our rocket is set up correctly

3 use the correct size launch rod

8 double check programming before launch

13 double check programming on the altimeter is correct

18 double check programming on the altimeter is correct

23 double check the rocket before placing on the launch pad

28 double check programming on the altimeter is correct

2 body tube and nose cone are fiberglass

7 Make sure device isn’t damaged

12 make sure there is no defects in engine

17 double check programming on the altimeter is correct

22 Make sure Tracking device is secure

27 make sure black powder amount is correct

1 check continuity 6 double check the payload is set up

11 Use in wall fins 16 double check programming on the altimeter is correct

21 double check tracking device is on

26 make sure there electric match is touching the black powder

SafetySafety

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• Follow NAR and TRA safety rules for launch• Safe material usage restrictions• Safe distance from launch pad• Safe recovery area• Inspection by range safety officer before flight

• Follow our check list when preparing for launch• Have fire extinguisher and first aid kit on site• Follow our own (AIAA OC Section Rocketry) safety rules for shop as well as launch (attached to the proposal and the PDR• MSDS referred to as needed and can be found on our web site• Manuals are posted on the web site since they contain set-up information for recovery electronics• Presentation given to all team members with their signature that they attended and understand

Educational OutreachEducational Outreach

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• Girl scout workshop and launch outing in October/November 2010• Giving presentation to AIAA professional society council meeting with all AIAA members in Orange County invited in Januaury 2011• Newspaper articles

• Article in Sunny Hills High School (Fullerton, CA) school paper• Feature article being researched/written for Orange County Register• Local paper in Orange, CA – The Foothills Sentry – will carry article

• Presentations at Orange County 4H clubs• Contacted Discovery Science Center for youth booth – they are featuring space exploration

Budget - ExpendituresBudget - Expenditures

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Description Unit Costs Totals

Scale Vehicle and engines

2.6" Black Brant, engines, parachutes etc. 250

Contingent second rocket just in case first is destroyed 250 $500.00

Vehicle

4" Black Brant, parachutes, adhesive etc. 522

Contingent second rocket just in case first is destroyed 522 $1,044.00

Recovery

Flight Computers, wiring, batteries, parachutes etc. 698

Contingent second recovery just in case first is destroyed 698 $1,396.00

Payload

Computer, hard drive, accelerometer, batteries etc. 425

GPS System

Beeline GPS (70cm), TNC, Garmin, Wiring etc 545

Contingent GPS Rocket Transmitter (Beeline) 300 $845.00

Motors (full sized vehicle)

5 Grain 54 mm Cesaroni casing, delay drill, 3 motors $562.00

Educational Outreach

Travel, printing, rocket kits etc. 275 $275.00

Travel (16 team members 4 days)

Airline, food, hotel, car rental $15,920.00

Total Estimated Project Expenses $20,542.00

Budget summary – full details in PDR

Budget - IncomeBudget - Income

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• NASA Grant for SLI teams• Fundraising letters to Southern California Aerospace

• Boeing• Raytheon• Northrop Grumman• Lockheed Martin

• AIAA Orange County Section• Garage sales• Car Wash

TimelineTimeline

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ProblemsProblems

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• Inconsistency of data• Impulse values are different between Rocksim, Thrustcurve.org and Cesaroni for the same engine

• Calculations (formula) vary between tools• On-line calculators give different values than Rocksim• Different versions of Rocksim give different values

QUESTIONSQUESTIONS&&

COMMENTSCOMMENTS

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