Preliminary Design Review NASA University Student Launch
Initiative University of NebraskaLincoln 2012-2013
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Team Overview Mission Build a launch vehicle to reach an 5,280
feet altitude Use a dual-deployment recovery system Deploy a
payload at 1,500 feet Recover all components in a relaunchable
condition
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Slide 4
Preliminary Design Discussion
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Vehicle Overview Length:113 Diameter:6 Nose cone:34.6Von Karman
(LD-Haack), 5.5:1 Fin span:15(3-fin configuration) Weight:35.9(With
motor and payload) Motor Mount:98mm31 long
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Kinetic Energy Section Kinetic Energy (ft-lbs) 153.459 219.498
344.604 47.06 Section Kinetic Energy (ft-lbs) 11101.7 2354.94
3811.99 4N/A Landing Velocity Terminal Velocity Wind Speed
(mph)Time (s)Distance From Launchpad (ft) No Wind137.99.02776
5137.21629.4 10138.161274.7 15137.701982.6 20136.902,761.6 Wind
Speed (mph)Time (s)Distance From Launchpad (ft) 20121.532,206.5
Ejection Charge is set for 1500ft Ejection Charge is set for
1000ft
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Stability Characteristics OpenRocket Model Will need to be
verified Mass (with motor): 35.9 lbs CG: 66.9 inches CP: 77
inches
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Flight Simulation
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Plans for Vehicle Safety RiskConsequencePrecautionary Measures
Misuse of Power Tools Bodily Injury: Cuts, Abrasions, and Bruises
Work stoppage Instructions will be given prior to student use of
equipment. Experienced technicians or upper classmen must be
present for all machining. Unintentional Ignition of Igniters or
Electric Matches Bodily Injury: Minor Burns Fire Lose of critical
supplies All electric matches will be shorted together at their
ends. Proper storage in secure grounded case
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Plans for Vehicle Safety RiskConsequencePrecautionary Measures
Unintentional Detonation of Black Powder Bodily Injury: Serious
Burns, and hearing loss Ejection charges will be filled last with
flight computers deactivated. Handlers will wear work gloves and
Ear Plugs. Unintentional Ignition of Motor Bodily Injury: Serious
Burns, Bruises, Loss of Life Cancellation of Flight Property Damage
All motors stored unloaded without igniters. Prepared motors will
not be loaded with igniters until mounted on pad. Loading must be
supervised or performed by Certified personnel.
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Plans for Vehicle Safety RiskConsequencePrecautionary Measures
Component Damage Through Testing Increased costs Project Delays
Redesigns Grounded equipment used when handling sensitive
electronics. Wearing necessary and precautionary safety equipment.
Only required personnel allowed in proximity to components during
testing. Checklists utilized to ensure proper procedures during
operation Contact with Hazardous Chemicals and Materials Bodily
Injury: Irritation, burns, and allergic reaction Work stoppage
Material Safety Data Sheets of all hazardous chemicals and
materials will be available to and reviewed by all members.
Facilities with fume hoods will be used for caustic materials.
Protective equipment including, but not limited to, gloves, safety
glasses, and filtered face masks.
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Plans for Vehicle Safety RiskConsequencePrecautionary Measures
Launch and Recovery Problems Loss of Vehicle Loss of Payload
Serious Bodily Injury or Death Property Damage Following TRA/NAR
Safety Code Use of checklists Cancellation of Launch in event of
adverse weather conditions. All personnel must be at safe distance
before ignition system is armed.
Launch Vehicle Verification SubsystemTest PlanVerification
MetricTarget Date Altimeter Accuracy Subscale Test flights
Agreement between altimeters December 2012 Recovery System
Deployment Ground Simulation Test flights Components ejected
forcefully Visually confirm deployment Vehicle recovered intact
January 2013 Tracking Equipment Ground distance test Test flights
Line of sight transmission at least 1 mile Successful tracking
after launch December 2012 Motor integration Test fit Fit adapter
if needed No shifting of motor Motor housed internally January 2013
Altitude Full scale test flight for both candidate motors Add
ballast as needed Compare recorded altitudes with that of
simulations February March 2013
Transition Assembly Components 2 6-inch bulkheads One small
step for man One 6-inch diameter polycarbonate plate One GoPro
camera Two eyebolts Material Alumium case Dimensions Length 6
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Avionics Components Perfectflite StrattoLogger Featherweight
Raven Concept of Operation Activated by external key switches
Primary charge fired by both altimeters Secondary charge fires 5
seconds later by Raven
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Recovery Mounting Nosecone Tethered to Transition Transition
Tethered to Booster Forged U-Bolts Concept of Operations Drogue @
Apogee Main @ 1,500-Feet ComponentCharacteristic DimensionComment
Main Parachute10816 Spill hole Drogue24X-form Shock Cord521 Tubular
Nylon Nomex Wadding24
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Booster Assembly Components 98mm MMT + Retaining Ring Fins x 3
Coupler Material Carbon Fiber Fiberglass (8oz) Dimensions Length 50
inches
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Fins Material 1/8-inch G10 fiberglass Fiberglass Vinyl Ester
Resin Construction Laser cutting Hand sanding Vacuum Bagging
Assembly Mounting to MMT Bond to booster Tip to tip
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Functional Requirements SystemSubsystemRequirement Nosecone
with payload bay Primary System Reduce drag force Must not deform
under flight loading Mount drogue parachute Couple with Sustainer
Communications Array Transmit GPS location to Ground Station
TransitionPrimary System House recovery and avionics bays Must not
deform under flight loading Couple to payload bay Couple to Booster
Recovery Systems Tethers the Nosecone and Booster together Avionics
Bay House Flight Computers Mount Ejections Charges Allows space for
video camera
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Functional Requirements SystemSubsystemRequirement
BoosterPrimary System House motor mount tube Fin Mounting Couple to
Sustainer Must not deform under flight loading Transfer fin moment
Fins Stabilize vehicle for flight Must not deform under flight
loading Motor Mount Tube Transfer axial motor thrust load Mount
Parachute to Engine Block Retain motor Allow quick installation of
motor
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Baseline Payload Design
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SubsystemPre-Flight Test PlanVerification MetricTarget Date
Payload Canister Mechanical Ejection Test Degree of
separationFebruary 2013 Plane Component deployment Wings unfold
Airspeed/resonance relationship Degree of MovementJanuary 2012
Sensors and transmitter Compare sensor data to know values Transmit
data Sensor output values (received data ) w/in 1% of known values
(transmitted data) February 2013
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Activity Plans
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Schedule
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Budget
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Lockheed Martin Space Day Current Collaboration Water rocketry
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