PHS Student Launch Team 2 Preliminary Design Review

PHS Student Launch Team 2 Preliminary Design Review Presentation

Launch Vehicle Dimensions Size and mass ● Length: 110” ● Diameter: 5. 5” ● Mass Without Motor: 236. 36 oz ● Mass With Motor: 311. 44 oz

Stability Margin ● CP (from nose): 77. 03 in. ● CG (without motor): 48. 37 in. ● CG (with motor): 60. 14 in.

Launch Vehicle Materials • Blue Tube Airframes • Fiberglass Bulkheads, Fins, and Centering Rings • 3 D Printed ABS Plastic Payload Plates • ½” Tubular Kevlar Recovery Harness • 84” and 24” Nylon Parachutes • Plastic, 13” Nosecone

Material Justifications • ½” Kevlar has a test strength of 7200 lbs. • ABS is stronger than PLA, and can be used with adhesives. • Blue Tube is durable and has high resistance to abrasion and cracking. • Fiberglass is a strong composite material, with lower cost than alternatives such as carbon fiber. • Parachutes minimize descent rate to 22. 2 ft/s, while decreasing drift. • The nosecone reduces drag on the vehicle and secures the payload.

Vehicle Safety Verification • The team will follow all safety precautions in the NAR safety handbook. • The safety officer will oversee all construction and launch procedures. • The team will follow the Launch and Assembly checklist detailed in the PDR. • All material, tool and environmental hazards have been analyzed, and mitigations have been planned.

Vehicle Safety Test Plan • Ground ejection tests will be run to test the recovery system. • Fins, bulkheads and other epoxied components will be stress tested. • D-Links will be wrenched tight. • Entire rocket assembly will be functionally tested during test flight.

Motor Selection and Justification • • Aerotech K 1050 White Lightning Total Impulse: 2426. 4 Ns Average Thrust: 1132. 9 N Maximum Thrust: 2172. 0 N

Simulation Data • Predicted Altitude: 5539 ft. • Thrust to Weight Ratio: 14/1. • Rail Exit Velocity: 95. 71 f/s.

Flight Profiles

Launch Vehicle Verification • The team will use detailed simulations to ensure the vehicle reaches a maximum altitude of 5280 ft. • The launch vehicle will use only one K 1050 WL motor. • The use of two parachutes will ensure that the vehicle is recoverable. • Vehicle will comprise only three sections. • Drag will be hand calculated to ensure proper simulation data. • Vehicle will use a 12 volt firing system to initiate launch.

Vehicle Test Plan • A sub-scale launch vehicle will be flown in December. • Data from this flight will be used to adjust the full-scale, as necessary. • The full-scale vehicle will be flown in February with NEFAR, an affiliate of NAR and TRA.

Discussion of Subsystems • • Recovery: • 84“ main and 24” drogue parachutes • ½” D-Links • ¼” Eyebolts • ½” Tubular Kevlar Recovery Harness • 2 Perfect. Flite Stratologger Altimeters Upper Body Tube: • 48” long, 5. 5” wide Blue Tube Airframe • 5. 34” Fiberglass Bulkhead • Payloads

Discussion of Subsystems (Cont. ) • • Nosecone: • Plastic, Ogive • 13 in” long, 4 in” shoulder Coupler: • 12 in” long, 5. 34 in”OD Blue Tube coupler • 2 in” long, 5. 5 in”OD Blue Tube band • two 5. 19 in”OD, ¼in” thick Fiberglass Bulkheads • Altimeter Bay and Altimeters

Discussion of Subsystems (Cont. ) • Lower Body Tube • 46” long, 5. 5” wide Blue Tube Airframe • 5. 34” wide, ¼” thick Centering Ring and Thrust Plate • 25” long, 54 mm wide Blue Tube Motor Mount • 4 Half Parabolic Fiberglass Fins

Dimensional Drawing Drogue Upper stage and payload Main Coupler Lower stage

Recovery Schematic

Payload Design ● ● 5. 3”, 3 D printed base plates. 2 T-rails. Arduino UNO Antenna, made of solid core wire and Mega-Ohm resistor. ● Power provided by 9 V batteries and Trail fixtures.

Payload Schematic

Payload Verification The team’s payload will collect data on the voltage of residual EMI in the atmosphere. No part of the payload will be jettisoned, and no UAVs will be used. The payload will be secured by T-rail and plates between a bulkhead and nose cone, ensuring its safe recovery.

Payload Test Plan • Ground Test - Test of the payload within the work area. • Functional Test - Test of the payload during the test launch. • Prior to launch, all payload systems will be checked to ensure functionality.

Outreach • Payload Design • EMF Detectors • Plantation Holiday Parade • Open Lab Nights