american hero theme song lyrics Cookies: How does Skywriting work? A paraffin oil is injected to the exhaust in the airplane at controlled times, causing a white smoke in order to create. As the plane flies in numerous formations activating the oil spray, letters of your message are formed. The letters are formed from 7000 to 17,000 feet up, and so are occasionally miles tall. The design of the Saylor Beall Air Compressor is a big indicator of the quality and durability. Saylor-Beall products use materials selected specifically to give the following characteristics: long-lasting strength and warmth resistance. Exacting dimensions and precision tolerances cause a highly efficient air compressor design. State-of-the-art, computer controlled equipment perform machining operations with extreme accuracy. Also, modern quality control procedures continuously monitor the machining process.