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3.10.5 Distance to Take-Off
The distance to the “takeoff” point can be shown in the user-field Dist Toff. The takeoff point is defined as the
position where the instrument declared the beginning of the flight (more than 10km/h TAS or GPS speed for 5
seconds).
3.10.6 Distance to Cylinder / Distance to Start Cylinder
In a competition it is usually not necessary to fly to the actual start point, turnpoint or goal. It is only necessary to
fly through the boundary of a cylinder surrounding the start/waypoint/goal, defined when you set up the
Competition Route. The 6030 has two user-fields for displaying the distance to these competition cylinders. Dist
StCyl will show your distance to the boundary of the start cylinder and Dist Cyl will show your distance to the
boundary of the cylinder around the next waypoint in an active Competition Route. Dist StCyl is very useful
when trying to position yourself for an optimal start. Dist Cyl is also useful when flying the task, so that you do
not need to remember the size of the turnpoint/goal cylinder and subtract that from the distance to waypoint. For
a discussion of how to use the distance to cylinder information in competition please refer to section 5.4.3
3.11 Glide Ratio (L/D Ratio)
By definition, the glide ratio is calculated by taking the horizontal distance traveled and dividing it by the height
lost. The following types of glide ratios can be selected as user-fields:
Glide ratio through the air = true air speed divided by descent rate
Glide ratio over the ground = ground speed divided by descent rate
Required glide to destination = distance to the next waypoint divided by the altitude difference
to the waypoint. This is the ratio needed to reach your chosen destination from your present
position.
Required glide to goal = distance to goal divided by the altitude difference to goal around any
remaining turnpoints. On the last leg of a route L/D goal = L/D req. This field will only show a
value if there is an active route. The calculation does not take into account the elevations of
the turnpoints (for example, a turnpoint elevation might be higher than your current altitude).
3.12 Altitudes Above Targets
3.12.1 Altitude above Best Glide Line (A BG WP)
The user-field A BG WP displays your current altitude above (or below) the best glide to the next waypoint or
goal if you are on the final leg of a route. This value takes the calculated or the manually entered wind into
account. When the altitude over best glide becomes positive (meaning you could just make goal at best glide
speed) the A BG WP user-field will invert (white numbers on a black background). The altitude above best glide
is also the altitude that you could lose during final glide and still make it to goal. For more information please
see Section 5.2.1.
3.12.2 Altitude above Waypoint (Alt a WP)
The user-field Alt a WP displays your current altitude above (or below) the McCready glide path to the next
waypoint – or to goal if you are on final glide. When the value of Alt a WP becomes positive, the user-field will
invert (white numbers on a black background), indicating that you have gained sufficient altitude to fly to goal at
the optimum McCready speed ring setting. For more information please see Section 5.2.1 and 5.4.4.
3.12.3 Altitude above Goal (A BG Goal)
The user-field A BG Goal displays your altitude above (or below) best glide path to goal around the remaining
active route. This value takes the calculated or the manually entered wind into account for each leg of the
course. This feature is particularly useful when you have gained sufficient altitude to make it around the last
turnpoint (or the last few turnpoints in a tight course) and make goal. However, it is not possible for the 6030 to
anticipate changes in the wind speed or wind direction along the course and these will affect the accuracy of this
value. For more information please see Section 5.2.1.
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