Look at those pictures in the link! This card model was made with my attached pdf, but scaled up to 1:16.
http://sakrisonwings.blogspot.com/20...engine-in.html
Read the building instructions in my first post of this thread. There are some english writers in this german forum, so you can find out how to work with paper and cards.
Here is a free downloadable race aircraft:
http://www.scale-models.co.uk/card-m...-download.html