This two-axis autopilot combines Altitude Hold with the roll axis functionality of the System Twenty. It is designed to provide an economical solution for aircraft owners who need Altitude Hold, but don't want the additional functions of pitch command, vertical speed control or GS coupling. Independent system does not require interfacing to the altimeter or atti- tude gyro; derives all input from solid state absolute pressure transducer and accelerometer. Compact, remote-mounted pitch computer and amplifier. When engaged, smoothly holds existing altitude; can be activated during climb or descent. System senses out-of-trim conditions and annunciates direction to adjust pitch trim. Utilizes single, remotely-mounted On/Off switch to engage and disengage Altitude Hold.

This product now has STC for Beechcraft 99 Turboprop aircraft including A99A,B99 and C99 models.

Model Kit 30 Upgrade P/N 11-20068
Contains all necessary components & hardware to upgrade
single axis System Twenty to a 2-axis System 30.