www.askacfi.com ASA offers a variety of downloadable products for multiple types of devices from PCs and tablets to smartphones. Get your favorite titles in digital format for convenient, easy access. Instrument Flying Handbook (eBook PDF) $19.95. Instrument Flying Handbook (eBook EB) $19.95. Instrument Engineers' Handbook, 4th Edition, Volume 1—Process Measurement and Analysis (Process Variable and Safety Detectors, Analyzers) CHAPTER 1: General Considerations Download a complete aviation reference library to your laptop, e-book reader, Kindle DX, iPhone or iPod touch. Pilot's Handbook of Aeronautical Knowledge (h-8083-25a pdf) - Download PDF (104 MB); Airplane Flying Handbook (h-8083-3a pdf) - Download PDF (15MB); Instrument Flying Handbook (h-8083-15a pdf) - Download PDF (97 MB) Flight instruments are the instruments in the cockpit of an aircraft that provide the pilot with information about the flight situation of that aircraft, such as altitude, airspeed and direction. They improve safety by allowing the pilot to fly the aircraft in level flight, and make turns, without a reference outside the aircraft such as the horizon. The attitude indicator (AI), formerly known as the gyro horizon or artificial horizon, is a flight instrument that informs the pilot of the aircraft orientation relative to Earth's horizon, and gives an immediate indication of the smallest orientation change. The miniature aircraft and horizon bar mimic the relationship of the aircraft relative to the actual horizon. Instrument Flight Training Handbook the PIC book is good ASA Instrument Flying books are good FAA Instrument Flying and Instrument Procedure are free and good albeit dry reading Instrument Pilot Handbook is the best for actual techniques for flying on instruments and has good cheatsheets for copy down clearance and flying approaches. Min. aeronautical experience required for an airplane instrument rating : v 50 hours x-country PIC time. O Of which, 10 hours in air