2010 2011 AIAA OC SECTION CDR PRESENTATION February 7 2011 Student Launch Initiative AIAA OC Section Agenda Introduction of team members representing 5 high schools in Orange County California ID: 391644
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STUDENT LAUNCH INITIATIVE
2010 – 2011AIAA OC SECTIONCDR PRESENTATIONFebruary 7, 2011\
Student Launch Initiative
AIAA OC SectionSlide2
AgendaIntroduction 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
2
Student Launch Initiative
AIAA OC SectionSlide3
Changes Since Original PostingAdded 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 24
Added photos to several slides3
Student Launch Initiative
AIAA OC SectionSlide4
Final Vehicle – Black Brant 4
Student Launch Initiative
AIAA OC SectionParameterMaterial/Measure
ParameterMaterial/MeasureDiameter4 inches
Length
87.5 inches
Body
G-10 fiberglass
Fins
G-10
fiberglass
Liftoff Wt
17.9 pounds
Descent wt
15.44 pounds
Cp
64.3 inches from tip
Cg
55.48
inches from tip
Stability Margin
2.21 : 1Motor RetentionAeropack Qwik change motor retainerThrust/wt8.28:1Launch1” rail 6 feet longSlide5
Drogue Parachute 5
Student Launch Initiative
AIAA OC SectionDrogue Parachute Details
Drogue Parachute24” TAC-1 (Giant Leap Rocketry) gives 65 ft/s descentDrogue material1.9oz low porosity ripstop nylon weight=8oz (estimate)
Drogue Construction
4 shrouds
½” nylon (1400 lb test) continuous across parachute
Swivel
1500 lb test
Shock Cord
Tubular
Nylon
5/8 inch, 15 feet long,
2250 lb test
Airframe
space available
4” diameter x 10” long (approx 125
cu in) (8” usable)
Airframe
space required (Lineal inches) parachute/shock cord
2 inches/1.5 inches
Black powder for drogue1.02 gramsPressurization details16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)Slide6
Main Parachute 6
Student Launch Initiative
AIAA OC SectionMain Parachute DetailsMain Parachute
72” TAC-1 (Giant Leap Rocketry) gives 20 ft/s descentMain material1.1oz low porosity ripstop nylon weight=18oz
Main
Construction
4 shrouds
½” nylon (1400 lb test) continuous across parachute
Swivel
1500 lb test
Shock Cord
Tubular
Nylon
5/8 inch, 15 feet long,
2250 lb test
Airframe
space available
4” diameter x 17” long (approx 214
cu in)
Airframe
space required (Lineal inches) parachute/shock cord
12 inches/1.5 inchesBlack powder for Main1.74 gramsPressurization details16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)Slide7
Cesaroni K635 Redline7
Student Launch Initiative
AIAA OC Section
Pro54 1994K635-17A
Motor 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™Slide8
Motor Selection 8
Student Launch Initiative
AIAA OC SectionMotor PropertiesManufacturerCesaroni
Motor TypeK635 RedlineMax, Average Thrust(Newtons)656Total Impulse
(Newton – Seconds)
1749.5
Mass
of Motor Before and After Burn
(Pounds)
4.38/1.45Slide9
RockSim Simulation Results 9
Student Launch Initiative
AIAA OC SectionPropertyO MPH Wind15 MPH Wind
MotorCesaroni K635Cesaroni K635Velocity 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 DeploymentTime=17.6 secondsTime=17.4 secondsDrogue Deployment (cont’d)Alt=5213 ft Velocity=0 ft/secAlt=5095 ft Velocity=63 ft/sMain DeploymentTime=66 secondsTime=68 secondsMain Deployment (cont’d)
Alt=900 ft Velocity=88 ft/sec
Alt=900 ft Velocity=85 ft/sec
Time to landing
99 seconds
109 secondsSlide10
Parachute and Descent RatesRocket 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/s10
Student Launch Initiative
AIAA OC SectionSlide11
Dual DeploymentElectronics: 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)11
Student Launch Initiative
AIAA OC SectionSlide12
Dual Deployment TestsChristmas Tree Light:Vacuum Chamber:First Launch12
Student Launch Initiative
AIAA OC Section
Electronic
Successful
MAWD Perfect Flight
Yes
HCX G-Wiz Partners
Yes
Electronic
Successful
MAWD Perfect Flight
yes
MAWD Perfect Flight
yes
HCX G-Wiz Partners
No
HCX G-Wiz Partners
Yes
HCX G-Wiz Partners
Yes
Flight
Height
Successful
First Flight
1938
Yes
Second Flight
1740
PartialSlide13
PayloadG-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 components13
Student Launch Initiative
AIAA OC SectionSlide14
GPS TRACKING14
Student Launch Initiative
AIAA OC SectionTransmitter 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 ouncesGround Station
Receiver: Yaesu VX-6R TNC: Byonics Tiny Track 4 GPS: Garmin
eTrex
Vista
Beeline receives GPS position
Encodes as AX.25 packet data
Sends as 1200 baud audio on 433.92 MHz
VX-6R receives at 433.92 MHz and extracts audio
TinyTrack
4 converts audio to digital NMEA location data
Garmin
displays the digital location data on human screenSlide15
Test Plans and ProceduresFebruary 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 1215
Student Launch Initiative
AIAA OC SectionSlide16
Scale Model – Black Brant 16
Student Launch Initiative
AIAA OC SectionParameterMaterial/Measure
ParameterMaterial/MeasureDiameter2.6 inches
Length
62.35 inches
Body
G-10 fiberglass
Fins
G-10
fiberglass
Liftoff Wt
5.1 pounds
Descent wt
4.56 pounds
Cp
51.2 inches from tip
Cg
43.99 inches from tip
Stability Margin
3.19 : 1
Motor RetentionAeropack Qwik change motor retainerThrust/wt6.7:1Launch1” rail 6 feet longSlide17
Scale Model – Black Brant 17
Student Launch Initiative
AIAA OC SectionScale modelEngine
Cesaroni H152Size of shock cord5/8” (sustainer) ½” (top section) flat nylonLength of shock cord15 feet (sustainer) 10 feet (top section)
Drogue parachute
15 inch rip stop nylon
Main
parachute
30 inch rip stop nylon
Black powder for drogue
1.01 grams
Black powder for main
1.14 gramsSlide18
Scale Model Test Flights18
Student Launch Initiative
AIAA OC SectionClick here for video on aiaaocrocketry.orgSlide19
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 Analysis19
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 togetherSlide20
TestingAll the testing we have done is to help insure that our rocket is safe20
Student Launch Initiative
AIAA OC Section
Testing that has been done includes: Black Powder
Battery
Life
GPS
Range
Scale
Model LaunchSlide21
Testing – Black PowderThe 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 charges21
Student Launch Initiative
AIAA OC Section
Located AmountSuccessful
Scale – Main
1.01
yes
Scale – Drogue
1.14 grams
yes
Full – Main
Rocket not completed
Full – Drogue
Rocket not completed
Slide22
Testing – Battery Life22
Student Launch Initiative
AIAA OC SectionElectronicsLife
time (hours)SuccessfulHCX G-Wiz Partners
2.5
Yes
MAWD Perfect Flight
36 (and still going)
Yes
Big Red Bee Beeline GPS
18.7 (and still going)
Yes
Payload
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 converterSlide23
Testing – GPS RangeOur 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. 23
Student Launch Initiative
AIAA OC Section
Transceiver LocationRange
Successful
On the ground
3.05 miles
YesSlide24
Websiteaiaaocrocketry.org Contains a separate tab: SLI 2010-2011DocumentsCalendersMSDSSLI Photos/Videos ManualsAllows for the team members to stay updated 24
Student Launch Initiative
AIAA OC SectionSlide25
Educational OutreachCloverdale 4-H clubGirl 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 SectionSlide26
Thank you for letting us be part of SLIQuestions&Comments?26
Student Launch Initiative
AIAA OC Section