BoomBlastExplosion on Instagram: "That's not just noise—that's controlled violence turned into engineering progress. This is the Rocket 4 first-stage engine, burning RP-1 and liquid oxygen with the precision of a detonator and the discipline of a launch vehicle. Every hotfire pushes Astra closer to lifting 600 kg to Low Earth Orbit, proving that its 360 kN of thrust can be trusted when the countdown hits zero. When you're chasing rapid-launch cadence, every flame, every shockwave, every millisec