Attitude/Heading Reference System (AHRS)
AHRS

The following 2 AHRS sensors can be connected to the Enigma/Voyager/Odyssey. They are connected to the Airtalk port in the rear of the EFIS display. If both sensors are connected, an RCA Y-connector can be used. Airtalk uses standard RCA cables/connectors available from your audio/video equipment store (6 foot length ships with each sensor).

Made by MGL Avionics, these are some of the smallest aviation AHRS sensors available today.

SP-2 Magnetometer (Compass sensor) SP-4 Attitude (horizon) sensor What is it? The SP-2 contains a three-axis magnetic field sensor and a 2-axis accelerometer. Featuring a high resolution 16 bit measurement system, a powerful ATMega processor is used to output tilt-compensated heading information. If an SP-4 AHRS is used on the same Airtalk communications link, tilt compensation is augmented using gyro data. What information can be displayed on the EFIS? Magnetic Heading Wind speed and direction vector Technical Size: Approx 3” x 2” (Tiny) Weight: 40g + 25g (connector) = 65g (2.3 oz) Power consumption: 50mA What is it? The SP-4 contains 3 MEMS gyros and 3 MEMS vibrating body accelerometers. Using a 16 bit data acquisition subsystem, a powerful ARM7 32 bit processor is used to provide stabilized attitude information. Together with an SP-2 magnetometer on the same Airtalk communications link, the gyro heading can be automatically slaved to the magnetic heading. What information can be displayed on the EFIS? Attitude Slip and skid G-Force Technical Size: Approx 3” x 2” (Tiny) Weight: 45g + 25g (connector) = 70g (2.5 oz) Power consumption: 40mA / 80mA (heater on) Degrees per second: 150-170 deg/sec typical

Manual: SP-2 and SP-4 User and Installation Manual (PDF)

Advanced ARS

The SP-5 is our latest and greatest attitude sensor (the SP-2 is still required for compass). The SP-5 uses the same gyros used in several certified attitude sensors.

What is it?
The SP-5 contains 3 Silicon Sensing MEMS gyros (the same gyros used in certified AHRS units) and 3 Analog Devices MEMS accelerometers. Using a 16 bit data acquisition subsystem, a powerful ARM7 32 bit processor is used to provide stabilized attitude information. Together with an SP-2 magnetometer on the same Airtalk communications link, the gyro heading can be automatically slaved to the magnetic heading.

What information can be displayed on the EFIS?
Attitude
Slip and skid
G-Force

Technical
Size: Approx 4 1/2” L x 3 5/8” W x 2” H
Weight: 281g + 49g (connector) = 330g (11.6 oz)
Power consumption: 64mA / 191mA (heater on) at 12 VDC
Degrees per second: 180-200 deg/sec typical

Manual: SP-2 and SP-5 User and Installation Manual (PDF)

Inside the SP-2

Inside the SP-4...

Inside the SP-5...