From Team Fortress Wiki
Not fast enough; not by a damn sight.
— The Engineer on wing speed
The Frontier Flyboy is a miscellaneous item for the Engineer. It is a pair of insect wings attached to the back of the Engineer with tape.
This item can only be worn around Halloween or during a Full Moon; at other times of the year, it does not appear in gameplay, unless the server has Halloween mode enabled. However, it can be equipped at any time and can still be viewed on the loadout screen even when it is not visible during games.
Engineer's vocalizations are 145% higher pitch.
- "Flyboy" is American slang for those in the United States Air-Force, commonly labeled airmen.
October 27, 2011 Patch (Very Scary Halloween Special)
- The Frontier Flyboy was added to the game.