MGL Avionics Stratomaster Ultra “L” Owner’s manual
Page 7
another Stratomaster Ultra, Ultra or Flight slave unit, a PC, Flight data recorder (black box),
and key download devices (for transfer of the log to a remote PC).
Technical specifications
Altimeter
Range 0-40 000 ft (12 195 m), 1ft (or 1 m) dynamic resolution, 7.5 ft (or 2 m) static resolution
at sea level. Dynamic resolution applies with the aircraft in flight. Dynamic resolution is
measured by mathematically evaluating the turbulence created around the aircraft.
Basic accuracy at 20 degrees C (68 degrees F) +/- 30 ft (9 m) based on calibration to
mercury manometer at +/- 1 mb (0.0295 Inch of Hg).
Maximum theoretical error /- 1.5% over temperature range 0-40 degrees C (104
degrees F). Typical error factor over temperature range 0-40 degrees C (104 degrees F) is
less than 0.5%
Note: The altimeter can be operated to altitudes above 40 000 ft (12 195 m). Range and
accuracy above the 40 000 ft (12 195 m) level are dependant on individual units. The
achievable range is in the region of 45 000 ft (13 720 m) to 60 000 ft (18 293 m) depending
on manufacturing tolerances of the pressure sensor.
Airspeed indicator
Range 0-200 mph (322 Kph or 174 Knots), 1 mph (1 Kph or 1 Knot) resolution. Theoretical
accuracy 1% at 20 degrees C (68 degrees F), subject to installation of pitot tube and airflow
pattern around aircraft.
Versions for higher airspeeds are available at reduced low speed sensitivity.
VSI
Range +/- 9 990 ft. (3 045 m) Resolution truncated to 10 ft/minute (5cm per second).
Internally 1 ft/minute. Ac/-5 %, Please note: The VSI is compensated for altitude.
Analogue VSI display is logarithmic providing both very high sensitivity and a wide range.
Minimum display resolution is as low as 10 ft/min (5cm per second) with a +/-2 000 ft (610 m)
maximum reading.
Rev counter
Range 0 to 9 999 revs. Resolution is dependant on rev counter setup in instrument.
Accuracy: +/- 0.0005% + resolution.
Fuel flow sender input
Accuracy of measurement is +/-0.05% subject to accuracy of fuel flow sender used. Example
sender is RS 256-225: +/- 3% uncalibrated, typically less than 1% calibrated.
External temperature probe
Display resolution 1 degree C or 1 degree F. Accuracy 0.5 degrees typical. Range –50 to
+99 degrees C (-58 degrees F - 210 degrees F).
