Bolly propellers for aircraft, hovercraft, airboats, wind machines, wind tunnels, large or small. bolly propellers are a product of over 25 years experience in design and manufacturing of carbon composite propellers.. Site map of vintage projects . machine shop. 2 ton shop press – screw type press. steam engine plans – fractional horse power engine. air compressor – small sized compressor. low speed drill press – speed reducer. powered hack saw – like a horizontal band saw. metal shaper – manually operated shaper. sheet metal press brake – small press brake.. Wooden boat plans provide the necessary information for making a boat to fit your particular needs. whether you are trying to capture the feel of a classic boat or just want a customized fishing boat, good plans are the first step toward creating the vessel of your dreams..