Modelling an airplane with a irregular shape I'm trying to model this plane, which is the ME 262(1941) : 

As you can see, the plane's nose is in a conic shape; however, the rest of the body is triangluar-ish. As a result, I'm having some problems modelling the plane since the transition from the conic shape nose to the triangular body is weird. I need the two to transition properly and smoothly. Could somebody help me with this? Thank you.
Start by adding a edge around the "triangluar-ish" part. Add a circle with the same number of vertices as the outer edge.
Then open up the specials menu with W, and find the Bridge Edge Loops command.

In this picture I have a mirror modifier so I only have to model half of the plane.