Introduction

The Alta-X runs on a version of the PX4 flight stack. It contains a paramter called MPC_THR_HOVER. This parameter controls the throttle setpoint required for hovering. This depends on the weight of the aircraft, and is about 29% for no payload. Default is 40% for a 15lb payload.

Setting this parameter correctly will eliminate drops or climbs when switching between manual and either altitude or position mode with the throttle stick at 50%. It is also important to set this parameter correctly to prevent bunny hops when landing in automated or in position modes.

Adjusting on the Blue Alta X with Pilot Pro

Open

• Open the QGC app and connect to the vehicle

• Click on the gears icon near the top left

• Scroll down and select ALTA Config on the left sidebar

• Scroll down on the main menu until you find the hover settings

• Increase or decrease the setting to match the approximate hover thrust during flight conditions