Ardupilot Arduplane APM2.5 2.6 Air Speed Meter For RC Airplane

Ardupilot Arduplane APM2.5 2.6 Airspeed Meter For RC Airplane Note:Just for reference, not included the white Airspeed tube Description: Brand Name: Ardupilot / APM2.5 2.6 Item Name: Airspeed Meter Airspeed do some helps with heavy wind, slow speed flying and automatic landing Working principle: upper tube is dynamic (measuring the air pressure of front opening, air is compressed into airspeed tube) the bottom tube is static (measuring the side port airspeed tube) Checked Operation: You can use APM Planner or stand on the ground to got the numerical value. Blowing into a pitot tube to observe the response. Zero in the still air and small value oscillation (2-3) are normal. The airspeed change with the pressure's square root.So the change under close to zero pressure difference is very small,while in flight need more pressure to generate the estimated speed changes. If you see the most numerical value is 0,1,2, the occasional rebound to 3 or 4, think it is normal. You will not see this change in flight. Package Included: 1 x Airspeed Meter