--- On Sat, 9/27/08, Erik Boehm <erikboehm07@yahoo.com> wrote: > Well, if you have the minimum aerodynamic qualities to stay > in the air in ridge lift (as archie or micro would have), > you could get around along a ridge most of the time - I like the 'trees-to-ridge-to-flapping' scenario for ptero's. Very appealing. Don