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Student Launch Initiative AIAA OC Section STUDENT LAUNCH INITIATIVE 2010 – 2011 AIAA OC SECTION CDR PRESENTATION February 7, 2011 1 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 • Testing • Flights, and Flight Analysis Black Powder, Battery Life, GPS Range Website Educational Engagement Questions 2 Student Launch Initiative AIAA OC Section 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 3 Student Launch Initiative AIAA OC Section Final Vehicle – Black Brant 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 4 Student Launch Initiative AIAA OC Section Drogue Parachute Drogue Parachute Details Drogue 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) 5 Student Launch Initiative AIAA OC Section Main Parachute Main Parachute Details Main 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) 6 Student Launch Initiative AIAA OC Section Cesaroni K635 Redline Pro54 1994K63517A Motor Data Brandname Pro54 1994K635-17A Manufacturer Cesaroni Technology Man. Designation 1994K635-17A CAR 1994-K635-17A Designation Test Date 7/6/2003 Single-Use/Reload/Hybrid Reloadable Motor 54.00 x 488.00 Dimensions mm mm (2.13 x 19.21 in) Loaded Weight 1989.90 g (69.65 oz) Total Impulse 1749.50 Ns Propellant Weight 1281.00 g (44.84 oz) Maximum 728.70 N (163.96 Thrust lb) 656.00 N (147.60 (393.64 lb.s) Burnout Weight 658.40 g (23.04 oz) Avg Thrust Delays Tested 17 - 7 secs ISP 139.30 s Samples per second 1000 Burntime 2.66 s Notes Red Lightning™ lb) 7 Student Launch Initiative AIAA OC Section Motor Selection 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 8 Student Launch Initiative AIAA OC Section RockSim Simulation Results 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 9 Student Launch Initiative AIAA OC Section 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 10 Student Launch Initiative AIAA OC Section Dual Deployment Electronics: MAWD Perfect Flight, HCX GWiz 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) 11 Student Launch Initiative AIAA OC Section Dual Deployment Tests Christmas Tree Light: Electronic MAWD Perfect Flight HCX G-Wiz Partners Vacuum Chamber: Electronic MAWD Perfect Flight MAWD Perfect Flight HCX G-Wiz Partners HCX G-Wiz Partners HCX G-Wiz Partners Successful Yes Yes Successful yes yes No Yes Yes First Launch Flight Height Successful First Flight 1938 Yes Second Flight 1740 Partial 12 Student Launch Initiative AIAA OC Section 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 13 Student Launch Initiative AIAA OC Section GPS TRACKING 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 14 Student Launch Initiative AIAA OC Section 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 15 Student Launch Initiative AIAA OC Section Scale Model – Black Brant 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 16 Student Launch Initiative AIAA OC Section Scale Model – Black Brant 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 17 Student Launch Initiative AIAA OC Section Scale Model Test Flights Click here for video on aiaaocrocketry.org 18 Student Launch Initiative AIAA OC Section Scale Flight Analysis • 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 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 19 Student Launch Initiative AIAA OC Section Testing All the testing we have done is to help insure that our rocket is safe Testing that has been done includes: Black Powder Battery Life GPS Range Scale Model Launch 20 Student Launch Initiative AIAA OC Section 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 Located Amount Successful Scale – Main 1.01 yes Scale – Drogue 1.14 grams yes Full – Main Rocket not completed Full – Drogue Rocket not completed 21 Student Launch Initiative AIAA OC Section Testing – Battery Life 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 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 22 Student Launch Initiative AIAA OC Section 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. Transceiver Location Range Successful On the ground 3.05 miles Yes 23 Student Launch Initiative AIAA OC Section 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 24 Student Launch Initiative AIAA OC Section 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 25 Student Launch Initiative AIAA OC Section Thank you for letting us be part of SLI Questions & Comments? 26