As part of USA Today's "Design a Transformer" contest, Josh Nizzi entered "Longbow", an Apache Attack Helicopter. About his entry, he says "when in robot mode the jets in his feet allow him to maintain flight. The tail rotor expands and becomes a saw on his right arm. On his left arm is the machine gun from the underbelly. Missiles fire from his shoulders."
All other entries can be seen at USA Today: http://www.usatoday.com/community/photo ... 25507394a8
