Dimensions?

This is a strange request, but does anyone know of a place where I can find various items measurements? Im trying to find some stuff to build in sketchup, and its easiest to make them using dimentsions (you cant put 3 views in the background for reference)
Right now I am about to start working on the Space Shuttle. I could probably get a basic model without real data, but I want my models to be accurate
Right now I am about to start working on the Space Shuttle. I could probably get a basic model without real data, but I want my models to be accurate