FRSKY ASS70 ADV Air Speed Sensor series has comprehensive sensor types and enhanced the performance and capability of the original sensor line, all ADV sensors fully support FBUS protocol and they are also S.Port compatible. With the FBUS protocol, the ADV sensors can be seamlessly paired with the FBUS capable receiver further simplifying the builds setup.
The ASS70 ADV Sensor can be used to measure airspeed at the speed range of 0~270km/h (0~167.7 mile/h).
Specifications:
- Operational Voltage: DC 4 -10 V
- Current consumption:20mA@5V
- Measure airspeed range: 0~270km/h (0~167.7mile/h )
- Circuit Board: Weight 6.3g / Dimensions 33*22*10.16mm (L*W*H)
- Pitot Tube: Weight 4.4g / Length 101mm / Diameter 2.6mm
- Pitot Tube Hose: Clear silicon tubing, 3 feet (1 meter), 2mm ID, 4mm OD
- Compatible with FBUS/S.Port protocol
Package Included:
- 1x FrSky ASS70 Air Speed ADV Sensor
Why We Recommend This
The ASS70 ADV is the compact airspeed option — same pitot-tube accuracy as the ASS100ADV but sized for smaller builds where the full-size sensor would be too large. Our recommendation for sport planes and trainer-sized aircraft where you want airspeed monitoring without bulk. FPV Builds RC provides U.S.-based product support, sensor-selection assistance, and setup guidance for FrSky products purchased through our store.
Frequently Asked Questions:
What is the FrSky ASS70 ADV air speed sensor used for?
The ASS70 ADV measures indicated airspeed (IAS) via a pitot tube, streaming real-time airspeed telemetry to your FrSky transmitter via FBUS or S.Port. It is designed for fixed-wing aircraft — trainers, gliders, sport planes, and scale models — where airspeed awareness is important for stall prevention and landing approach management. Knowing true aerodynamic speed through the air is more relevant than GPS ground speed for flight safety.
ASS70 vs ASS100ADV — which air speed sensor do I need?
The ASS70 is designed for aircraft flying up to approximately 70 m/s (about 157 mph), making it suitable for trainers, gliders, aerobatics planes, and most sport aircraft. The ASS100ADV extends the range to approximately 100 m/s (about 224 mph) for faster EDF jets and high-speed models. If your aircraft won't exceed 157 mph, the ASS70 is the right choice. Browse both at https://www.fpvbuildsrc.com/frsky-sensors.
Which FrSky receivers is the ASS70 ADV compatible with?
The ASS70 ADV connects via FBUS or S.Port and works with all TD Tandem, TW Twin, and Archer Plus FrSky receivers. FBUS is the recommended connection for new builds. Browse the full receiver range at https://www.fpvbuildsrc.com/frsky-receivers.
How do I install the pitot tube on my aircraft?
Mount the pitot tube pointing directly into undisturbed airflow — typically at the nose, on a wing tip leading edge, or on a boom away from prop wash. The static port should not face the direction of airflow. Run the connecting tube from the pitot head to the ASS70 sensor body inside the fuselage. Secure both the tube and sensor firmly to avoid vibration-induced noise in your readings. FrSky provides a mounting guide in the ASS70 product documentation.
What is the difference between indicated airspeed and GPS speed?
Indicated airspeed (IAS) measures the speed of air flowing over your aircraft — the aerodynamically relevant number that determines lift, drag, and stall margin. GPS speed is ground speed, which varies with wind. Into a 20 mph headwind, an aircraft at 60 mph IAS shows only 40 mph on GPS. For stall avoidance during approach, IAS is what matters, not GPS speed.
How does airspeed display in ETHOS on my FrSky transmitter?
When connected via FBUS to an FBUS-capable receiver and a Tandem X18 or X20 series transmitter running ETHOS, airspeed appears as a live telemetry field. You can display it on the transmitter home screen in m/s, km/h, or mph, and configure low-airspeed audio alerts to signal approach-to-stall conditions during flight.
Does FPV Builds RC offer setup support for the ASS70 ADV?
Yes. FPV Builds RC is a U.S.-based FrSky dealer and can assist with pitot tube positioning, FBUS wiring, and ETHOS configuration for airspeed telemetry. Browse the complete FrSky sensor lineup at https://www.fpvbuildsrc.com/frsky-sensors.
