Actually, if you are complely new to 3d modelling, which Im guessing you are, I wouldnt recommend you do an aircraft at all. Making aircraft in 3d isnt any harder than making other stuff, but if you are not familiar with the tools at your disposal it could prove to be quite a challenge. I would recommend you do some tutorials and stuff, and then come back to aircraft when you have a better knowledge of the tools, then the task at hand wont seem so overwhelming.