1 STUDENT LAUNCH INITIATIVE

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STUDENT LAUNCH INITIATIVE

2010 – 2011AIAA OC SECTIONCDR PRESENTATIONFebruary 7, 2011\

Student Launch Initiative

AIAA OC Section

Slide2

Agenda

Introduction of team members (representing 5 high schools in Orange County California)Changes Since Original Posting Finalized Vehicle – Black BrantParachutes, Motor, RockSim Simulations, Parachute and Descent Rates, Dual Deployment, Payload, GPS Test Plans and ProceduresScale Model – 2.6” Black BrantFlights, and Flight Analysis TestingBlack Powder, Battery Life, GPS RangeWebsiteEducational Engagement Questions

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Student Launch Initiative

AIAA OC Section

Slide3

Changes Since Original Posting

Added slide 3Modified slide 4Modified slide 5Split slide 5Modified slide 6Modified slide 8Added slide 9Modified slide 15Modified Slide 16Modified slide 17Added slide 21 Modified slide 22Modified slide 23Modified slide 24Added photos to several slides

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Student Launch Initiative

AIAA OC Section

Slide4

Final Vehicle – Black Brant

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Student Launch Initiative

AIAA OC Section

ParameterMaterial/MeasureParameterMaterial/MeasureDiameter4 inchesLength87.5 inchesBodyG-10 fiberglassFinsG-10 fiberglassLiftoff Wt17.9 poundsDescent wt15.44 poundsCp64.3 inches from tipCg55.48 inches from tipStability Margin2.21 : 1Motor RetentionAeropack Qwik change motor retainerThrust/wt8.28:1Launch1” rail 6 feet long

Slide5

Drogue Parachute

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Drogue Parachute DetailsDrogue Parachute24” TAC-1 (Giant Leap Rocketry) gives 65 ft/s descentDrogue material1.9oz low porosity ripstop nylon weight=8oz (estimate)Drogue Construction4 shrouds ½” nylon (1400 lb test) continuous across parachuteSwivel1500 lb testShock CordTubular Nylon 5/8 inch, 15 feet long, 2250 lb testAirframe space available4” diameter x 10” long (approx 125 cu in) (8” usable)Airframe space required (Lineal inches) parachute/shock cord2 inches/1.5 inchesBlack powder for drogue1.02 gramsPressurization details16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)

Slide6

Main Parachute

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AIAA OC Section

Main Parachute DetailsMain Parachute72” TAC-1 (Giant Leap Rocketry) gives 20 ft/s descentMain material1.1oz low porosity ripstop nylon weight=18ozMain Construction4 shrouds ½” nylon (1400 lb test) continuous across parachuteSwivel1500 lb testShock CordTubular Nylon 5/8 inch, 15 feet long, 2250 lb testAirframe space available4” diameter x 17” long (approx 214 cu in)Airframe space required (Lineal inches) parachute/shock cord12 inches/1.5 inchesBlack powder for Main1.74 gramsPressurization details16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)

Slide7

Cesaroni K635 Redline

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Pro54 1994K635-17A

Motor Data BrandnamePro54 1994K635-17AManufacturerCesaroni TechnologyMan. Designation1994K635-17ACAR Designation1994-K635-17ATest Date7/6/2003Single-Use/Reload/HybridReloadableMotor Dimensions mm54.00 x 488.00 mm (2.13 x 19.21 in)Loaded Weight1989.90 g (69.65 oz)Total Impulse1749.50 Ns (393.64 lb.s)Propellant Weight1281.00 g (44.84 oz)Maximum Thrust728.70 N (163.96 lb)Burnout Weight658.40 g (23.04 oz)Avg Thrust656.00 N (147.60 lb)Delays Tested17 - 7 secsISP139.30 sSamples per second1000Burntime2.66 sNotesRed Lightning™

Slide8

Motor Selection

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AIAA OC Section

Motor Properties

Manufacturer

Cesaroni

Motor Type

K635 Redline

Max, Average Thrust

(

Newtons

)

656

Total Impulse

(Newton – Seconds)

1749.5

Mass

of Motor Before and After Burn

(Pounds)

4.38/1.45

Slide9

RockSim Simulation Results

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AIAA OC Section

Property

O MPH

Wind

15 MPH Wind

Motor

Cesaroni

K635

Cesaroni

K635

Velocity at end

of 6ft rail

56 ft/sec at .251 seconds

56 ft/sec at .251

seconds

Maximum vertical acceleration

435 ft/sec2

434 ft/sec2

Maximum velocity

678 ft/s (V) 0.0 ft/s

(H)

668 ft/s (V) 22 ft/s (H)

Maximum range from launch

0 feet

1077 feet

Maximum

altitude

5213 ft

5095 feet

Drogue

Deployment

Time=17.6

seconds

Time=17.4 seconds

Drogue

Deployment (cont’d)

Alt=5213 ft Velocity=0 ft/sec

Alt=5095 ft Velocity=63 ft/s

Main Deployment

Time=66 seconds

Time=68

seconds

Main Deployment (cont’d)

Alt=900 ft Velocity=88 ft/sec

Alt=900 ft Velocity=85 ft/sec

Time to landing

99 seconds

109 seconds

Slide10

Parachute and Descent Rates

Rocket mass = 247.09 oz (Descent Mass)Drogue chute diameter = 24 in.Main chute diameter = 72 in.Calculated projected velocity for each chute with online calculator and by hand (http://www.rocketreviews.com/tool_descent_rate.shtml)FD = ½ (ρ)(Cd)(A)(v2)Cd = 1.00FD = mg = (7.00 kg)(9.8 m/s2)ρair = 1.22kg/m3Hand: vdrogue = 65.43 ft/s Online: vdrogue = 63.51 ft/sHand: vmain = 20.49 ft/s Online: vmain = 20.09 ft/s

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Student Launch Initiative

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Slide11

Dual Deployment

Electronics: MAWD Perfect Flight, HCX G-Wiz PartnersThe electronics will “back” one another up incase one pyro (either drogue or main) does not fire.Drogue Parachute will be deployed at apogeeMain Parachute will be deployed at 900ftThe electronics have been tested four tests have been done:Christmas tree light test Vacuum Chamber testFirst flight in the scale rocket (MAWD Only)Second Flight in scale model (MAWD Only)

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Student Launch Initiative

AIAA OC Section

Slide12

Dual Deployment Tests

Christmas Tree Light:Vacuum Chamber:First Launch

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ElectronicSuccessfulMAWD Perfect FlightYesHCX G-Wiz PartnersYes

ElectronicSuccessfulMAWD Perfect FlightyesMAWD Perfect FlightyesHCX G-Wiz PartnersNoHCX G-Wiz PartnersYesHCX G-Wiz PartnersYes

Flight

Height

Successful

First Flight

1938

Yes

Second Flight

1740

Partial

Slide13

Payload

G-Wiz Partners HCX flight computer - measures acceleration of the rocketToshiba hard drive – test subject; we will run a Linux script on the hard drive over and over again; the time the hard drive takes to run the script each time is measuredSimple net computer/Linux computer – the mini computer that will execute the Linux script on the hard drive; it will be initialized by a PC; the flight data will be recorded on a flash drive inserted into this computerPower converter – Keeps a steady flow of power to the payload components

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Student Launch Initiative

AIAA OC Section

Slide14

GPS TRACKING

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Student Launch Initiative

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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 Vista

Beeline receives GPS position

Encodes as AX.25 packet dataSends as 1200 baud audio on 433.92 MHzVX-6R receives at 433.92 MHz and extracts audioTinyTrack 4 converts audio to digital NMEA location dataGarmin displays the digital location data on human screen

Slide15

Test Plans and Procedures

February 12 launch Scale model (Note: 1st launch was January 1) Test dual Deployment (MAWD and HCX) Ejection charges Full Scale model Test with modified ejection charge amountLaunch Full Scale Model March 5 and/ or March 12

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Student Launch Initiative

AIAA OC Section

Slide16

Scale Model – Black Brant

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AIAA OC Section

ParameterMaterial/MeasureParameterMaterial/MeasureDiameter2.6 inchesLength62.35 inchesBodyG-10 fiberglassFinsG-10 fiberglassLiftoff Wt5.1 poundsDescent wt4.56 poundsCp51.2 inches from tipCg43.99 inches from tipStability Margin3.19 : 1Motor RetentionAeropack Qwik change motor retainerThrust/wt6.7:1Launch1” rail 6 feet long

Slide17

Scale Model – Black Brant

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Scale modelEngineCesaroni H152Size of shock cord5/8” (sustainer) ½” (top section) flat nylonLength of shock cord15 feet (sustainer) 10 feet (top section)Drogue parachute15 inch rip stop nylonMain parachute30 inch rip stop nylonBlack powder for drogue1.01 gramsBlack powder for main1.14 grams

Slide18

Scale Model Test Flights

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Student Launch Initiative

AIAA OC Section

Click here for video on aiaaocrocketry.org

Slide19

FaultMost probable causeHow we are going to fix itInstability when reaching apogeeTeam rushed to get in one more flight and did not notice fillets on fins over the tailcone had cracked (West Systems Epoxy was used everywhere except fillets which were hobby shop epoxy)Ultilize time more wisely, and not look over look any ‘small’ detail – use fiberglass tape on fins especially over gel coat on tailcone and never use hobby shop epoxy anywhere – even just filletsDrag/impulse SeparationDid not use shear pins on main per advice of an on-site “mentor” at the launch (“rocket is so small you don’t need them”)Follow the design and don’t let others misguide you

Scale Flight Analysis

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Student Launch Initiative

AIAA OC Section

First flight to 1938 ft was very acceptable and proved design was stable

Second flight to 1749 ft began well, but:

Showed a problem with wobble as it approached apogee

Deployed both drogue and main together

Slide20

Testing

All the testing we have done is to help insure that our rocket is safe

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Student Launch Initiative

AIAA OC Section

Testing that has been done includes:

Black Powder

Battery

Life

GPS

Range

Scale

Model Launch

Slide21

Testing – Black Powder

The table below shows the testing our team has done with black powder charges. How we did the testing was by assembling the rocket as we normally would but through the pressure hole we put a wire to a battery to fire charges

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Student Launch Initiative

AIAA OC Section

Located AmountSuccessfulScale – Main1.01yesScale – Drogue1.14 gramsyesFull – MainRocket not completed Full – DrogueRocket not completed 

Slide22

Testing – Battery Life

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Student Launch Initiative

AIAA OC Section

Electronics

Life time (hours)SuccessfulHCX G-Wiz Partners 2.5YesMAWD Perfect Flight 36 (and still going)YesBig Red Bee Beeline GPS 18.7 (and still going)YesPayload 3.74 (and still going)Yes

Each device tested began with a new or just charged battery and ran under conditions close to sitting on the pad. Results were measured using a DATAQ Instruments DI-194RS four channel analog to digital converter

Slide23

Testing – GPS Range

Our team first let the electronics connect to satellites, once it had done that then we started to walk away from the transmitter (Big Red Bee Beeline) and saw how far it would transmit while being in the rocket.

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Student Launch Initiative

AIAA OC Section

Transceiver LocationRangeSuccessfulOn the ground3.05 milesYes

Slide24

Website

aiaaocrocketry.org Contains a separate tab: SLI 2010-2011DocumentsCalendersMSDSSLI Photos/Videos ManualsAllows for the team members to stay updated

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Student Launch Initiative

AIAA OC Section

Slide25

Educational Outreach

Cloverdale 4-H club

Girl Scouts workshop Presentations to Sunny Hills HighSchool Science classes to get involved Help out ABC Unified School Districtwith their annual Science OlympicsArticles published/ will be publishedin the Orange County Register,The Foothill Sentry, and the Sunny Hills High School AccoladeWe have contacted the Discovery Center to participate in their Youth BoothWe are going to have a booth at Youth Expo (4/8 – 4/10) and teach kids how to build rockets while informing them on SLI and other cool aerospace careers – approximately 2,600 students will be dropping byIn the process of contacting corporations regarding fundraising

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Student Launch Initiative

AIAA OC Section

Slide26

Thank you for letting us be part of SLI

Questions&Comments?

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Student Launch Initiative

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