MGL Avionics Stratomaster Ultra Horizon XL Owner’s manual
Page 50
TIME
The current time of day. This is set in the “Aircraft setup” menu. Should you often fly in
controlled airspace you may want to set the time to read UTC rather than local time. Date and
time of day are relevant for flight information stored in the logbook. The date and time
originates from a built in crystal controlled watch with low drift characteristics. You may need
to correct the time for small drift every few months. This is done in the “user setup menu”.
FLIGHT
The duration from take-off of the current flight or the duration of the last flight if no flight is
currently active.
Note: We recommend that you set the instrument to “automatic flight detect” in the mode
menu. Should you prefer manual flight start and stop then the FLIGHT timer will show the
time from the manual start of a flight to its manual stop.
Manual flights are started and stopped in the relevant menu item in the main menu.
GCR
Glide or climb ratio indicator. This useful item divides your forward distance made good by
your vertical speed. The ratio is shown as a number from 0.00 to 99.9. It should be
interpreted as follows:
Example: GCR 8.5. This means for every 1 ft (or meter) of vertical sink or climb you are
traveling 8.5 ft (or meters).
The arrow in front of the number indicates climb or sink rate. This function is useful to
optimize glide ratio or judge the effects of changes to your airframe or power plant.
TEMP
The ambient temperature. You need to install the included ambient temperature probe in
such a fashion that it is exposed to the outside air. Do not install the probe inside your cockpit
or instrument pod. Install the probe in such a fashion that it will not be heated by engine
exhaust or sunlight. Ambient temperature is required to calculate density altitude.
TRIP
A flight distance trip counter similar to a trip counter in a car’s speedometer. The trip counter
is reset using the relevant menu entry in the main menu. You can also set the instrument to
reset the trip counter automatically at the start of a flight (mode setup menu). The trip
counter shows the actual distance traveled through the air and does not take wind speed or
direction into account. The distance is based on TAS (true airspeed) regardless of the setting
of the air speed indicator.
The trip counter is useful during navigation competitions when GPS may be banned.
VOLT
The supply voltage level to the unit. This would normally be the voltage of your battery. This
indication serves as a battery charge indicator. Should you be using a lead-acid battery
(sealed unit or open, motor cycle battery), your maximum voltage should not exceed 13.8
volts if you have a 12 volt battery or else overcharging and damage to your battery will result.
Many regulators are of poor quality and will overcharge your battery.
A voltage level of under 11 volts indicates a discharged battery. Do not discharge your
battery below this level as you will damage it.
A charged, healthy battery will have voltage levels between 12V and 12.6V when not
charged.
RANGE
