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L1 High-Power Rocket Project (NAR Level 1 Certification)

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Akilesh Yelchuru

Project Timeline

Aug 2025 - Oct-2025

OVERVIEW

Designed, built, and flew a high-power rocket to earn NAR Level 1 certification, taking the vehicle from concept through simulation, fabrication, and launch with a focus on stability, recovery reliability, and prediction vs. flight validation

HighlightS

  • Modeled the rocket in CAD and flight-simulation software to size the motor, fin set, and recovery system for a safe, stable flight profile
  • Applied basic CFD/trajectory analysis to refine nose cone and fin geometry, reducing drag and improving stability margin
  • Integrated airframe, avionics, and recovery hardware; executed pre-flight checklists and post-flight data review to compare predicted vs. actual apogee

SKILLS

Computer-Aided Design (CAD)Rocket stability & recovery designFabrication & assemblyTest prep (checklists)Post-flight data review

Additional Details

Goal

Earn NAR Level 1 by designing, building, and safely flying a high-power rocket from concept → simulation → fabrication → launch, then validating predicted vs. actual performance.

Requirements / Constraints

  • NAR Level 1 compliance and range safety standards

  • Stable flight with reliable recovery deployment

  • Target apogee ≈ 1,000 ft within field/safety constraints

  • Motor: H210R

  • Vehicle scale: ~4.5 ft length, ~7 in diameter

Design Overview

  • Modeled the rocket in CAD and finalized the airframe + fin can geometry around the H210R motor, avionics bay, and recovery bay packaging

  • Sized and positioned fin geometry to maintain a stable CG/CP separation through boost and coast

  • Designed the recovery system (parachute, shock cord, attachment points) for consistent deployment and survivable landing loads

Analysis / Simulation

  • Ran flight simulations to estimate apogee and verify stability across the motor burn profile

  • Used basic aerodynamic/trajectory checks to refine nose cone and fin geometry, reducing drag and improving stability margin prior to fabrication

Build & Integration

  • Assembled airframe, integrated avionics and recovery hardware, and verified retention/access for arming

  • Executed a structured pre-flight process: CG verification, recovery packing checks, and continuity checks

Results / Validation

  • Predicted apogee: ~1,000 ft

  • Actual apogee: ~1,200 ft (~20% higher than prediction)

  • Performed post-flight review to reconcile prediction error and improve future modeling assumptions (mass properties, drag estimates, wind/launch angle effects)


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