On the weekend, myself and a friend want to make a quadcopter (aka quadrocopter) for something fun to do. However, we're wondering about things like weight/thrust ratios of different fan blades and motors etc. And we realised we'd like to create a basic model of a quadcopter in a 3D simulation software to test different efficiencies.
What software would be suitable for this?
I can't find anything after some Googling. We'd love to build many things besides quadcopters too in it.