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Hi guys. I made the following simple draft design with open rocket. I don't have any trouble when I activate the left parachute. but when I signed two parachutes, "recovery device deployment at high speed problem" error. I'm a novice, if you can help me ı will be happy. my rocket needs to...

Hello We have established an engineering project team and decided to make a rocket. We will participate in a competition in our country. We're going to build a commercial motorized rocket at 1500 meters altitude. We've got some questions on our heads. 1- The rocket will have a two-stage rescue...