Four Forces of Flight Sign Sporty's Pilot Shop Sold by Sporty's Pilot Shop Humorous Sign Add some humor to your hangar or office with this sign. Vintage finish provides a weathered look. Four holes for mounting.
Humans sometimes make cloud formations without realizing it. High-flying military planes and low-flying commercial planes cause disturbances in clouds. By doing so, they create their own formations. These aren't "real" cloud formations, of course,