Time to give this puppy some oomph by adding engines.
The engine nacelle is done almost exactly like the fuselage, with a twist (literally in this case, they angle downwards and inwards)
Use the circle tool to draw to draw the shapes, then drag them into place.
Then loft.
To make the engine and exhaust plates
Go to Surface> Planar Curves
Select the surface edges of the first and last sections
Press enter
And Voila
Put it on it's own layer.
Now we're gonna make it fit on the wings. Usually I have engines slide over the wing, but in the case of this model, that wouldn't leave enough engine to be buildable. So, we're gonna cut the wings to butt up against the engine.
Press the trim button and select the engine and press enter.
Then, turn the engine layer off by clicking on the little light bulb by it. and click on the inside edges of the wings. Now u have the wings trimmed to fit the engines.
Now that we've severely weakened the wings by breaking them up, we're gonna need to add internal support. What I do is use the rectangle tool to draw a box over the top of the wings, then project from the top onto the wings.
Then turn off the wing layer to show the lines just projected (there will be ones on the top and bottom. simply loft between the lines to form a box. To make it square, rather than setting to 50 control points when lofting, click on "Do Not Simplify"
Now, we need to mark the fuselage and engines where the wing box will go through them.
Turn the fuselage layer back on.
Go to Curve> Curve from Objects> Intersection, then select the wing box and fuselage sections that intersect.
do the same for the engine, then mirror the engine, wing box and wing so they match on both sides.
Voila
Almost done. We just need to draw the landing gear, add panel lines, and unroll everything.