One of the nice things about making images in SketchUp is the ease with which one can generate a variety of views and styles once the model has been constructed.
The plan I used for my 3D model was for a simple old stick and tissue flyer. I added some details gleaned from web presentations of the SE.5, including an extraordinary site about a restoration and replication factory in New Zealand specializing in WWI aircraft.
I have read that most of the 3D aircraft models found in the Google 3D Warehouse are actually produced with programs other than SketchUp and then imported to the program. That may be, but there is also some extremely sophisticated and inspiring work being done natively in the program. One good example is a thread at the Sketchucation site showing many details of the construction process.