Welcome to the section of my website dedicated to the propulsion of miscellaneous objects to high speeds. One of my favorite things are medieval siege engines, which one of is featured here.  If you are looking for Coil guns go here "Coil Gun".  Projects here include high speed pneumatic air cannons and ballista's and the newest addition ; The Jet Turbine Engine!

My Second Medieval Siege engine which takes on more of a "bow" design.  Made Of solid wood and metal fittings, capable  of launching a golf ball an average of 230 Ft.  A ballista is an ancient medieval engine of warfare which uses a bow like spring to hurl heavy projectiles at a target.

My never ending effort to convert a large turbocharger into a self contained turbine Jet engine that will one day hopefully be mounted to a boat.   ( test pilots welcome ! )