Hello Everyone. I build rocket in open rocket but I have some problems when run similations. I updated my .org fiel. Can anyone help me? Problems are : 1) Recovery device deployment at high speed 2)openrocket discontinuity in rocket body diameter These are teacher's conditions : • Within the content of AST 312 Rocket Propulsion project, each of the student groups will design a multi-stage amateur rocket which can carry 5 kg payload to 8000 m altitude. • After reaching the target altitude nose cone of the rocket should be detached from the fuselage and payload should be released together with its own parachute. Both of the payload and rest of the rocket assembly (Nose + Fuselage of the rocket) should also be safely landed using suitable independent parachute systems. • The payload’s vertical descent velocity should be less than 2 m/s and the rocket assembly’s vertical descent speed should be less than 7 m/s. • Stability of the rocket should be between 1.5 – 2.2.