• CUAV Digital Air Speed Meter Kit Without Pitot Tube For Fixed Wing Drone V5/V5+ Flight Controller

CUAV Digital Air Speed Meter Kit Without Pitot Tube For Fixed Wing Drone V5/V5+ Flight Controller

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CUAV Digital Air Speed Meter Kit Without Pitot Tube For Fixed Wing Drone V5/V5+ Flight Controller

Package Included:

- 2 x Silicone Tubes
- 1 x 4P Cable For Airspeed Meter
- 1 x Airspeed Meter

Airspeed Meter Calibration Introduction:
http://plane.ardupilot.com/wiki/calibrating-an-airspeed-sensor/

Attention:
Electronic equipment is a product with high technical content. When your equipment fails, please carefully check the wiring and power supply voltage.

Features:

- Adopt DF13 terminal interface. Distribution terminal line can be directly connected with flight control I2C expansion board.
- Sensor: The bottom is static pressure, and the top is dynamic pressure.
- Corresponding connection method of airspeed tube: The long end is connected to the dynamic pressure hole above the airspeed meter, and the short one is connected to the static pressure hole below the airspeed meter.

Install Pitot Tube:
You can DIY pitot tube.

It can be done with two refills. The dynamic tube is directly installed outside your aircraft, the static tube is plugged, and then 4 small holes of about 0.5-1mm are made on the side.

When you install the airspeed sensor on the plane, use this pitot tube kit. The kit includes two pipes, a static pipe (the port is sealed and a small hole on one side) and a dynamic pipe (the straight-through pipe, not sealed). Two tubes can be placed side by side. On EasyStar, you need to pass them through the foam in front of the cockpit so that they can be exposed to the airflow. Make sure that the hole on the side of the tube is not covered. They should extend at least 1 cm from the nose. First connect the silicone tube behind the pitot tube to the air pressure sensor. The silicone tube from the straight tube should be connected to the upper port, and the elbow tube should be connected to the lower port. Drill or cut a small cut in the foam and push the Pitot tube to the front.

If you have a propeller in front of your aircraft, the dynamic tube must be pressed onto a wing, or at least below the fuselage, to avoid propeller airflow. The static tube can be installed anywhere.

Check Operations:
You can use APM Planner or other ground stations to read the airspeed count value. Blow into the pitot tube and observe the response. Zero and small oscillations (2-3) are normal in still air. The airspeed changes with the square root of the pressure, so the change at close to zero pressure difference is very small, and a larger pressure change is required to produce the estimated speed change during flight. If you see mostly 0, 1, 2, and occasionally bounce to 3 or 4, think it is normal. You will not see such changes during flights.

Differential Pressure Sensor board:
The MPXV7002 series piezoresistive transducer in the small outline package (SOP) is a state-of-the-art monolithic silicon pressure sensor designed for a wide range of applications, but particularly those employing a microcontroller or microprocessor with A/D inputs. This patented, single element transducer combines advanced micromachining techniques, thin-film metallization, and bipolar processing to provide an accurate, high level analog output signal that is proportional to the applied pressure.
 
The MPXV7002 is designed to measure positive and negative pressure. In addition, with an offset specifically at 2.5V instead of the conventional 0V, this new series allows to measure pressure up to 7kPa through each port for pressure sensing but also for vacuum sensing (refer to the transfer function in the data sheet for more detailed information). Features: -2 to 2 kPa (-0.3 to 0.3 psi). 0.5 to 4.5 V Output.

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