GPS has acquired). If other pages or functions have been accessed prior to setting the altitude, “Mod Alt1
!"
”
may not be present in the Information Field but can be called up with a long press of the Alt1 key.
When you adjust Alt 1, the sea level air pressure also changes and can be seen in the QNH hPa or QNH inHg
user-fields. To set the altitude of your current location based on the QNH pressure, follow the steps to set Alt 1 –
but rather than setting the Alt 1 value to a specific altitude, use the !" keys to set the QNH user-field to the
value reported by a weather radio or flight service. If Alt 1 is set to zero for any planned landing area, then the
height above this location will always be indicated after starting. The associated air pressure (QFE) will be the
actual air pressure in hPa at that altitude, which deviates from QNH, the pressure at sea level.
The user-field Alt GPS displays your altitude as determined by the internal GPS module, whereas, all of the
other altimeters in the 6030 use pressure altitude. Due to the different calculation methods for pressure
altitude and GPS altitude, Alt GPS will, more than likely, differ from Alt 1, even if you correctly set your reference
altitude prior to launch. On warm days pressure altitude will generally read lower than GPS altitude and can
differ a few hundred feet. It should be noted that the worldwide standard for aviation is pressure altitude.
Therefore, GPS altitude should not be used with respect to aviation regulations. Alt GPS may be useful in
competitions that set altitude limits with respect to GPS altitude.
As the pressure sensor in the 6030 ages, the pressure shown in the QNH user-field, when setting the altimeter,
may not coincide with the QNH provided by flight service, local weather station, etc. It is possible to correct this
by entering a pressure sensor correction value, however, this should only be attempted by experienced users.
If you find that the 6030 QNH does not agree with the QNH provided by reliable sources, contact Flytec for
assistance in entering a correction.
3.4 Speed
3.4.1 Airspeed
After vertical speed and altitude, air speed is the next most significant piece of flight information. Air speed
information increases safety and can be used to increase performance during racing and distance flights. The
best glide speed, the McCready speed to fly, and the netto vario can only function when the air speed is known.
The 6030 displays your air speed in the analog speed scale on the right side of the normal run-mode display,
and digitally at the top of the analog scale. You can choose to display air speed as true or indicated, and can
choose between two possible speed ranges for the analog speed display (12–37 mph) or (19–56 mph) in
Menu>Pilot settings>Speed>Speed mode.
The 6030 has two independent speed sensor options:
• A built-in pitot pressure sensor that measures indicated air speed (IAS) and is capable of showing
speeds of up to 180 mph (300 km/h) on the digital display and 12–56 mph on the analog speed scale. If
necessary, the pitot tube can be extended with a flexible tube to a turbulence-free spot on the glider or
removed (pulled out) for replacement. IMPORTANT: if the pitot tube is removed, the opening in the
fitting should NEVER be plugged airtight as this can over-pressurize and damage the internal
sensor.
• An optional vane wheel sensor (can be used with HG and PG versions of the 6030), which measures true
air speed (TAS) and is capable of showing speeds 1–94 mph (150 km/h) on the digital display and 12–56
mph on the analog speed scale. It is also well suited for determining the wind speed at takeoff. If this
sensor is plugged into a 6030, the pitot sensor will be disabled and the air speed from the vane sensor will
be displayed.
Regardless of which air speed sensor is used, the 6030 internally calculates both TAS and IAS. Should you be
unfamiliar with the difference between these two air speeds, please refer to Section 12.3, True or Indicated Air
speed in the Appendix.
The measured air speed from either speed sensor (pitot and vane wheel) can be corrected by applying a
correction factor in Menu>Pilot settings>Speed>Vane wheel correction or Menu>Pilot settings>Speed>Pitot
correction. The factory setting is 100% for both sensor options. When a value other than 100% is used, the
6030 will display that percentage of the measured value. It is also possible to set a constant offset onto the pitot
air speed value to compensate for the slower airflow underneath the wing; this is set in Menu>Pilot
settings>Speed>Pitot correction. This offset will be added or subtracted (depending on the sign) to the
measured air speed value. It is recommended that pitot correction be set to 100% if an offset value is to be
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