free cad software

I got inspired by @tanmaychhatbar and started creating FT Viggen in Fusion 360. My plan was to export it to 3ds and then get it into RealFlight (since 3ds is the supported import format). The nose isn't right. I have to make a physical one and then take measures. Too many angles :-) Will...

Hi guys, Does anyone know which CAD software Flite Test uses? Or any good ones for free? Thanks.