VectorNav VN-300

The VectorNav VN-300 is a high-precision INS/GNSS unit used primarily in research and reference installations. It provides the most comprehensive data set of any supported EFIS type.

When You'd Use This

The VN-300 is typically used for:

• Flight test — reference-grade attitude and position data
• Algorithm development — validating OnSpeed's internal AHRS against a known-good reference
• Research installations — academic or engineering flight data collection

Most normal OnSpeed installations use a Dynon, Garmin, or MGL instead.

Serial Setup

• Baud rate: 115200
• Protocol: Binary (127-byte packets with CRC-16)
• EFIS Type setting: VN-300

Data Available

The VN-300 provides the richest data set:

Category	Fields
Attitude	Yaw, pitch, roll with sigma (uncertainty) estimates
Angular rates	Roll, pitch, yaw rates (rad/s)
Velocities	NED frame velocities (m/s)
Accelerations	Body frame and linear accelerations (m/s²)
GNSS	Latitude, longitude, GPS fix quality, GPS velocities
Time	UTC time from GPS

All fields are logged to the SD card with vn prefix (e.g., vnPitch, vnRoll, vnGnssLat).

Configuration

1. Configure the VN-300 binary output at 115200 baud (consult VectorNav documentation)
2. Set EFIS Type to VN-300 in the OnSpeed web interface
3. Save and reboot