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Le immagini degli aerei provengono da http://www.af.mil/art/mediagallery.asp?galleryID=177 archive copy at the Wayback Machine, e sono di pubblico dominio in quanto prodotte dalla Nasa (http://www.jsc.nasa.gov/policies.html#Guidelines), tranne l'immagine dell'ala obliqua prodotta da me.

In particolare:

1. Ala rettilinea: North American XP-51
2. Ala a freccia positiva: F-100 Super Sabre
3. Ala a freccia negativa: Grumman X-29
4. Ala a delta: F-102A DELTA DAGGER
5. Ala a geometria variabile: F-111A Aardvark
6. Ala obliqua: NASA AD-1, disegno realizzato da me

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