1 STUDENT LAUNCH INITIATIVE 2010 – 2011 AIAA OC SECTION CDR PRESENTATION February 7, 2011 \...
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Transcript of 1 STUDENT LAUNCH INITIATIVE 2010 – 2011 AIAA OC SECTION CDR PRESENTATION February 7, 2011 \...
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STUDENT LAUNCH INITIATIVE2010 – 2011
AIAA OC SECTION
CDR PRESENTATION
February 7, 2011
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Student Launch Initiative
AIAA OC Section
Agenda Introduction of team members (representing 5 high schools in
Orange County California) Changes Since Original Posting Finalized Vehicle – Black Brant
• Parachutes, Motor, RockSim Simulations,
Parachute and Descent Rates, Dual Deployment, Payload, GPS
Test Plans and Procedures Scale Model – 2.6” Black Brant
• Flights, and Flight Analysis Testing
• Black Powder, Battery Life, GPS Range
Website Educational Engagement Questions
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Changes Since Original Posting Added slide 3 Modified slide 4 Modified slide 5 Split slide 5 Modified slide 6 Modified slide 8 Added slide 9 Modified slide 15 Modified Slide 16 Modified slide 17
Added slide 21 Modified slide 22 Modified slide 23 Modified slide 24 Added photos to
several slides
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Final Vehicle – Black Brant
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Parameter Material/Measure Parameter Material/Measure
Diameter 4 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 : 1 Motor Retention
Aeropack Qwik change motor retainer
Thrust/wt 8.28:1 Launch 1” rail 6 feet long
Drogue Parachute
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Drogue Parachute DetailsDrogue Parachute 24” TAC-1 (Giant Leap Rocketry) gives 65 ft/s descent
Drogue material 1.9oz 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 drogue 1.02 grams
Pressurization details 16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)
Main Parachute
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Main Parachute DetailsMain Parachute 72” TAC-1 (Giant Leap Rocketry) gives 20 ft/s descent
Main material 1.1oz 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 inches
Black powder for Main 1.74 grams
Pressurization details 16 psi - 200 lbs (3x#2 screws @ 35lbs each + friction)
Cesaroni K635 Redline
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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™
Motor Selection
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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
RockSim Simulation Results
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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
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 = 1.00
• FD = mg = (7.00 kg)(9.8 m/s2)
• ρair = 1.22kg/m3
Hand: vdrogue = 65.43 ft/s Online: vdrogue = 63.51 ft/s Hand: vmain = 20.49 ft/s Online: vmain = 20.09 ft/s
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Dual Deployment Electronics: MAWD Perfect Flight, HCX G-
Wiz Partners The electronics will “back” one another up
incase one pyro (either drogue or main) does not fire.
Drogue Parachute will be deployed at apogee
Main Parachute will be deployed at 900ft The electronics have been tested four tests
have been done:• Christmas tree light test • Vacuum Chamber test• First flight in the scale rocket (MAWD Only)• Second Flight in scale model (MAWD Only)
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Dual Deployment Tests
Christmas Tree Light:
Vacuum Chamber:
First Launch
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Electronic SuccessfulMAWD Perfect Flight YesHCX G-Wiz Partners Yes
Electronic SuccessfulMAWD Perfect Flight yesMAWD Perfect Flight yesHCX G-Wiz Partners NoHCX G-Wiz Partners YesHCX G-Wiz Partners Yes
Flight Height Successful
First Flight 1938 Yes
Second Flight 1740 Partial
Payload G-Wiz Partners HCX flight
computer - measures acceleration of the rocket
Toshiba 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 measured
Simple 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 computer
Power converter – Keeps a steady flow of power to the payload components
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GPS TRACKING
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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 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 screen
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 amount Launch Full Scale Model
March 5 and/ or March 12
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Scale Model – Black Brant
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Parameter Material/Measure Parameter Material/Measure
Diameter 2.6 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 Retention
Aeropack Qwik change motor retainer
Thrust/wt 6.7:1 Launch 1” rail 6 feet long
Scale Model – Black Brant
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Scale model
Engine Cesaroni H152
Size of shock cord 5/8” (sustainer) ½” (top section) flat nylon
Length of shock cord 15 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 grams
Scale Model Test Flights
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Click here for video on aiaaocrocketry.org
Fault Most probable cause How we are going to fix it
Instability when reaching apogee Team 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 fillets
Drag/impulse Separation Did 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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• 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
Testing
All the testing we have done is to help insure that our rocket is safe
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Testing that has been done includes:Black PowderBattery LifeGPS RangeScale Model Launch
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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Located Amount Successful
Scale – Main 1.01 yes
Scale – Drogue 1.14 grams yes
Full – Main Rocket not completed
Full – Drogue Rocket not completed
Testing – Battery Life
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Electronics Life time (hours) Successful
HCX 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 converter
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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Transceiver Location
Range Successful
On the ground 3.05 miles Yes
Website aiaaocrocketry.org Contains a separate tab:
SLI 2010-2011• Documents• Calenders• MSDS• SLI Photos/Videos • Manuals
Allows for the team members to stay updated
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Educational Outreach Cloverdale 4-H club Girl Scouts workshop Presentations to Sunny Hills High
School Science classes to get involved Help out ABC Unified School District
with their annual Science Olympics Articles published/ will be published
in the Orange County Register,The Foothill Sentry, and the Sunny Hills High School Accolade
We have contacted the Discovery Center to participate in their Youth Booth
We 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 by
In the process of contacting corporations regarding fundraising
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Thank you for letting us be part of SLI
Questions&
Comments?
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