MGL Avionics Stratomaster Ultra “L” Owner’s manual
Page 25
Align your aircraft with the runway in readiness for your take-off run.
1) Press Menu and hold it down (do not release).
2) Press Select key while the Menu key is being held down.
3) Start the take-off run when prompted by the instrument
The instrument commences measuring the length of the take-off distance when 16 mph (26
kph or 14 Knots) has been exceeded:
The measurement ends when the altimeter shows a 50 ft increase in altitude.
Once the take-off distance is shown, press any key to return to normal flight displays.
Note: you can also select the take-off distance function from the main menu.
Please note:
The ultimate accuracy of this measurement depends on your installation of the Stratomaster
Ultra Instrument. Should you not have installed a static port, it is possible for pressure
changes to occur in the instrument pod or cabin as your aircraft gains speed. This may lead
to a slight under- or over reading of the altimeter. This in turn will affect the instrument’s
determination of the 50 ft (15.2 m) obstacle.
The Stratomaster Ultra uses TAS (true airspeed) calculations to determine the distance the
aircraft traveled through the air.
This measurement should be performed on days with low wind speeds. Wind speeds as such
are canceled out of the measurement by default as the instrument can only measure actual
distance traveled through the air. However, be aware that if your aircraft performs a take-off
run into stronger wind it will leave the ground at a lower ground speed. This means less
friction of your wheels on the ground. The result of this is a decreased take-off run even if
only air-distance is measured.
