I guess it depends on the definition of a "wooden" jet. Once you put a piece of plywood into the structure then you are building with a composite. If plywood is considered wood then there is no limit to the size wooden jet you could build. The dura mold process is plywood and Howard would of put jet engines on the goose if they were available. I built a !/4 scale F9F. The airframe is 95% wood It has been flying for 10 years. My only limitation was building something that was reasonable to move. When it comes to stress, just because its powered with a turbine dosen't mean it has more stress on it. Anything can be under built or overstressed, turbine or prop.