 A model of a dragonfly in a wind tunnel shows the pattern of air passing over the insect Photographic Print 16 in. x 12 in. Unframed Framed / Mounted |  A model of a dragonfly in a wind tunnel shows the pattern of air passing over the insect Photographic Print 24 in. x 18 in. Unframed Framed / Mounted |  A model of a dragonfly in a wind tunnel shows the pattern of air passing over the insect Photographic Print 40 in. x 30 in. Unframed Framed |