Sperry AD-300C Attitude Director Indicator 4019700-903parts only This item is a model ad-300c super clean ready for the man/ woman cave it shows all the signs for a part that is over 30years old, but a great conversational piece for any room. It even has the original paperwork from when it was pulled out of its last plane. A decorator piece that will set off any room What does a attitude director do An Attitude Director Indicator (ADI), also known as an artificial horizon, is crucial for pilots because it provides a visual representation of the aircraft's attitude (pitch and bank) relative to the Earth's horizon, especially when the natural horizon is obscured, which is vital for instrument flying and maintaining control during maneuvers. Here's a more detailed explanation: Provides a Visual Reference: The ADI shows the pilot whether the aircraft is climbing, descending, banking left or right, or flying straight and level. Essential for Instrument Flying: In conditions where the natural horizon is not visible (e.g., clouds, fog, night), the ADI becomes a primary instrument for maintaining aircraft attitude and orientation. Redundancy and Backup: The ADI serves as a redundant instrument, providing a backup in case other flight instruments fail or provide incorrect information. Flight Director Integration: In some aircraft, the ADI is integrated with a Flight Director System (FDS) to provide flight path guidance, using cues like "V" steering bars to help pilots maintain a desired flight path. Coordination of Turns: When used with other instruments like the turn and bank indicator and vertical speed indicator, the ADI helps pilots execute coordinated turns and maintain bank control. Pitch and Bank Measurement: The ADI measures both pitch (nose up or down) and bank (wings left or right) angles, providing the pilot with a clear understanding of the aircraft's orientation. Types of ADIs There are traditional mechanical ADIs and newer digital ADIs, with digital models offering greater reliability and flexibility. What you see in the photos is exactly what you will receive. We are wholesaler/liquidators. We bought this in a lot of new items to resell. Our knowledge of this item is very limited. We are counting upon you to know what you are buying and if this item will suit your needs. This is being sold AS-IS. No returns. Please only purchase this if you agree to those terms. Shelf :25 LB listed 3/18/25