Hello everyone, I am a new member of this forum. We have a national rocket competition every year in Turkey. I and my friends formed a team to build a rocket that needs to go up to 3000 m apogee with 4 kilograms of payload. As there is no strict rule about what material we need to use, we are confused about what material we should use in order to build the rocket. Can you enlighten me on this topic? Thanks.