TARCkan Nasir Almasri Audrey Kelly Kari Schulz

Overview Problem Statement Timeline Background Scope Brainstorming & Research Criteria Constraints Explore Possibilities & Select Approach Design Proposal Prototype Test & Refine

Problem Statement We need to create a rocket using TARC-approved materials that is capable of carrying a 60-gram egg to an altitude of 750 feet and safely return it to the ground using a 15-inch parachute.

Timeline Problem Statement (Start date) ▫Nov 19-Nov 29 Detailed Timeline ▫Nov 29-Dec 3 Research ▫Dec 6-Dec 17 Criteria & Constraints ▫Dec 15-Dec 16 Explore Possibilities ▫Dec 20-Jan 4 Select an Approach ▫Jan 4-Jan 7 Design Proposal ▫Jan 7-Jan 28 Prototype ▫Jan 28-Mar 20 Presentation Materials ▫Nov 19-May 5

Background Competition ▫2002 ▫Largest rocket competition ▫Washington D.C. Future of Rocketry ▫Students getting into aerospace ▫70% now interested in STEM career ▫81% connect math, science & technology

Background (cont.) General Rocketry ▫“Space race” ▫NASA used models to save money Safety rules ▫Non-metal materials ▫Certified motors only ▫Cannot weigh more than 1,500 g ▫Cannot launch rocket at targets ▫Must use recovery system such

Scope Cannot purchase rocket building kit Perfectflite ALT15K/WD altimeter Approved rocket motor Go-Box (from Mr. Pritchard) Grand total money spent: $300 Use Mr. Pritchard & Mrs. Brandner for assistance Qualification must be by April 4 th

Deliverables TARC: ▫test results Mr. Pritchard ▫Completed rocket ▫CAD drawings ▫Final report ▫PowerPoint presentation Mrs. Brandner ▫Engineering notebook

Brainstorm Questions Fuel Best materials Ideal size for competition Types of wings and fins Competition-approved motors How NASA propels rockets ▫How we can use to our benefit Payload

Research TARC handbook Manufactures RockSim

TARC Criteria Altitude 750 feet Max propellant 62.5 g 15-in parachute 1000 g Rocket g Egg (45 mm) sec. Flight Alt15KA Altimeter Carry raw egg (max 45mm in diameter & 60g) ▫With no damage Results must be received before April 4 th

Constraints All materials (PowerPoint, finished project, and report) ▫May 5, 2011 Must use prior knowledge of math and science All progress recorded in engineering notebook

Explore Possibilities ProsCons Over 750 feetEgg may not fit secondsBulkhead too small Materials obtained easilyPaper body tube weak Reliable motorG-10 Fiberglass fins expensive Design #1 Polystyrene PS nosecone Paper body tube Rip-stop nylon parachute Two G-10 fiberglass fins Shock cord Alt15KA altimeter One bulkhead & centering ring

Explore Possibilities Design #2 C2-4 engine Alt15KA altimeter Thick plastic (for wings) PC piping Nylon parachute ProsCons Materials easy to obtainPVC Body tube too big Enough space for eggToo cheap & break easily Reliable engine (C2-4)May exceed weight limit More aerodynamicRocket almost 3 feet

Explore Possibilities Design #3 B6-4 engine Nylon parachute Plastic fins Shock cord Alt15KA altimeter Thick cardboard (for body) ProsCons Extra space & shock cordMotor too weak Recovery waddingEgg too big for nosecone Cheap body & nose coneNo space for padding Large body tubeIrregular shaped fins

Select an Approach CriteriaM/O#1#2#3 Altitude 750 feetM100 Max propellant 62.5 gM in parachuteM g RocketM g Egg (45 mm)M sec. FlightM100 Alt15KA AltimeterM111 No egg damageM100 Under $150O111 ReliabilityO100 Ease of BuildO110 Total Score 11XX #2 failed altitude, time & egg criteria #3 failed altitude & time criteria #1 passed all mandatory criteria

Final Design RockSim Design

Design Proposal: Build Process Body tube & Motors ▫Motor mounts Parachute ▫Shock cord Payload & nosecone ▫Padding, plastic bag Fins Final assembly

Design Proposal: Bill of Materials PARTDESCRIPTIONQUANTITYUNIT COSTShippingTOTAL Parachute15.5” diameter nylon1 chute (6 shroud lines)$5.00$1.75$6.75 Centering Ring0.6” dia, 0.25” thick2 Centering Ring kits$1.35$4.95$7.65 G10 Fiber glass Fin7” x 5” x 5” Fiberglass2 Fins$24$8.00$32.00 AltimeterPerfectflite Alt15KA1 Altimeter$55.00$0$55.00 EngineEstes C6-3 & D12-32 packs of 3 each $10.79 & $15.99 $6.99$51.11 Body tube 2.6”/2.59” out/in dia. 14” height 2 tubes per pack$5.09$0$10.18 Body Tube 0.967”outside diameter 18” height 3 tubes per pack$4.79$5.95$10.74 Body Tube Coupler2.59” outside diameter3 couplers$3.98$0$3.98 Shock Cord140 lb Strength3 feet$.25/foot$0$0.75 Shock Cord0.5” Kevlar Tubular2 yards$3.93/yard$6.95$14.82 Clip WhipsCluster Whips2 engine clusters$13.99$4.95$18.94 Nose Cone Polystyrene PS 9” long, 2.6” diameter 1 cone$14.53$7.60$22.13 Recovery WaddingRecovery sheets75 Sheets$3.19$0$3.19 Launch Lug¼ in. dia1 launch lug$2.49$5.95$8.44 TOTAL COST $253.63

Bill of Materials Items free of expense ▫Packing peanuts ▫Launch pad ▫Go-box

Design Proposal: CAD

Prototype

RockSim Testing Original design ▫Two fins ▫D12-5 engine feet second flight

Calculations y 1 = (-m/2k)*ln ((T-mg-kv 2 )/ (T-mg))  ( / (2*.00154))*ln (( ( ))/ ( )) = *ln (.792) = y c = (m/2k)*ln ((mg+kv 2 )/ (mg))  (.38125/(2*.00154))*ln( )/( )) = *1.496) = t a = (tan -1 (v/q a ))/q b  (tan -1 (91.676/49.256))/.199 = 1.861/.199 = 9.353sec y 1 + y c = total altitude  = m = feet

Test Results Test CriteriaHow TestedExpected resultsActual Results Safety Check signs of unsafe damage Rocket remains intact Durability Check for signs of deterioration Be ready to fly again Parachute Check for rips or holes No tears, still attached Altitude Read altimeter after each test flight 725 and 775 feet Flight Consistency Time each flight Flight be between seconds

Individual Test Results TestScorePass or Fail? Safety Durability Parachute Altitude Flight Consistency

Refine Design 3 fins vs. 2 ▫Stability More room in body tube ▫Egg ▫Parachute

Final Solution Height Weight

To Conclude