Aero Linx: U.S. Air Mail Pioneers U.S. Air Mail Service website is dedicated to the men and women of the U.S. Air Mail Service, a little-remembered organization that laid the foundation for commercial aviation worldwide. With the cooperation of the U.S. Air Service, the U.S. Post Office flew the mail from 1918 until 1927. Air Mail Service pilots are the unsung heroes of early aviation.  In their frial Curtiss Jennies and postwar de Havillands, they battered wind, snow, and sleet to pioneer round-the-clock airmail service along the world's longest air route, the U. S. transcontinental.  In the process, thirty-four pilots lost their lives. Through profiles, photographs and historicl articles,

Runway Heading The magnetic direction that corresponds with the runway centerline extended, not the painted runway number. When cleared to “fly or maintain runway heading,” pilots are expected to fly or maintain the heading that corresponds with the extended centerline of the departure runway. Drift correction shall not be applied; e.g., Runway 4, actual magnetic heading of the runway centerline 044, fly 044.

“Increased thrust requirements for the RS-25 are just one of the many changes in the SLS rocket’s performance that will facilitate our nation’s deep space exploration goals and objectives. While we can analytically calculate engine performance and structural capabilities at these higher power levels, actually demonstrating that performance with an engine hot fire provides the added confidence that these engines will meet all specification requirements demanded of SLS.” Source: Dan Adamski, RS-25 program director at Aerojet Rocketdyne, commenting on Aerojet Rocketdyne and NASA having recently powered up the RS-25 main engine for the agency’s powerful heavy-lift Space Launch System (SLS) to its highest thru