I am a big fan of the web site blendercookie.com, and they recently came out with a lovely tutorial series by Jonathan Williamson (using artwork from David Revoy), the Vehicle Modelling Series.
There are over 15 hours of movies, taking you through the process of modelling a Gyrocopter, from a series of pictures. It took we a while to go through all the videos, but it was well worth it. Here is a still of my final result…





