Does anyone know any good tutorials to make things like aircraft carriers, tanks, etc for cinema4d?

I don't know your modelling skills but I recommend you to start by making a normal car to learn the basics, such as this page http://www.7thchamber.com/pages/chevtut.htm.

This one http://www.tutorialguide.net/creatin..._tutorial.html explains how to create a tyre, you can easily strech the model and adjust it into a tank track, the principles are the same.

Although the way I work with Cinema4d is that I make a sketch on what I am about to model and work from there. One detail at a time and put it together like LEGO.

Otherwise there are plenty of premade models on the web for you to download and alter, so whatever you choose to do you will learn from it.
This page is pay pr download but gives you some input never the less http://gunpoint-3d.com/

darn wish there was a tutorial that step by step teachs u how to make everything lol

There might be, do a google search