Salut Lowracer,
Voici quelques liens intéressant :
http://www.hellbentcycles.com/trike_projects/Recumbent%20Trike%20Design%20Primer.pdf
http://www.fastfwd.nl/index.php?id=36
http://www.wisil.recumbents.com/wisil/wianecki/leaning_trike.htm
http://www.wisil.recumbents.com/wisil/wianecki/frank-n-liner/default.htm
http://www.bhpc.org.uk/bubble-and-squeak.aspx