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All Journal Multidisciplinary Innovations and Research in Applied Engineering
Alfan Firmansyah Aditya Aditya
Akademi Inovasi Indonesia
Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Design, Kinematic Analysis, and Scaled Prototype Validation of a Pneumatic Ejection Mechanism for Supersonic Re-Entry Capsule Testing Alfan Firmansyah Aditya Aditya; Bagus Wicaksono; Akhmad Mukhlisin; Nur Hadi Ardiyanto; Rajni Rizkia Sirat; Muhammad Rafi Akbar Salahudin; Afzalurrohman Abdullah; Alfin Mardiansyah; Muchammad Rifki Sistiawan; Rajib Alamsyah; Rahmat Dani Sulistyo; Ade Firmansyah; Luthfy Iqbal Musthofa; Yoga Aditiya Dwi Syah Putra; Ahmad Yusuf Maulana; Pandu Priyo Jatmiko; Muhammad Thoriq Akmal Aliansyah; Johnson Fernando; Prayogi Dwi Kuncoro; Diah Ayu Suci Kinasih; Fajrul Falah
Multidisciplinary Innovations and Research in Applied Engineering Vol. 2 No. 2 (2025)
Publisher : Akademi Inovasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70935/epbt3536

Abstract

High-altitude free-flight tests require release mechanisms capable of placing sub-scale re-entry capsules into a clean supersonic freestream while minimizing wake-induced attitude perturbations. This study presents AERO, a compact pneumatic ejection mechanism developed to support NASA SPEED-class capsule-release requirements as a scientific contribution to re-entry testing technology. The method combined wake-clearance interpretation, first-order kinematic sizing, pneumatic force analysis, CAD-based packaging, manufacturability assessment, and scaled prototype testing. A two-projectile-length clearance distance of 1.33 m was adopted, giving a required initial velocity of 5.11 m/s for a 0.5 s separation target. The full-scale analytical model predicted an ejection velocity of 5.2 m/s and a 0.44 s separation time at 0.5 MPa; increasing the operating pressure to 1.5 MPa increased the velocity to 9.7 m/s and reduced the separation time to 0.15 s. A 30% scale prototype using a 32 g Genesis Firefly capsule model showed a pressure-dependent height response, increasing from 63.0 cm at 0.2 MPa to 136.8 cm at 0.6 MPa. These findings provide analytical and scaled-prototype evidence that a pressure-tunable pneumatic architecture with a balancing hugger can support rapid, repeatable, and geometry-adaptable capsule ejection; flight-representative performance remains to be validated.
Co-Authors Ade Firmansyah Afzalurrohman Abdullah Ahmad Yusuf Maulana Akhmad Mukhlisin Alfin Mardiansyah BAGUS WICAKSONO Diah Ayu Suci Kinasih Fajrul Falah Johnson Fernando Luthfy Iqbal Musthofa Muchammad Rifki Sistiawan Muhammad Rafi Akbar Salahudin Muhammad Thoriq Akmal Aliansyah Nur Hadi Ardiyanto Pandu Priyo Jatmiko Prayogi Dwi Kuncoro Rahmat Dani Sulistyo Rajib Alamsyah Rajni Rizkia Sirat Yoga Aditiya Dwi Syah Putra