Flytec 6030 * - Manual (Page 55)

Flytec 6030-GPS
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The same polar curve. The pilot flies with
best glide in calm air. The pointer for
speed to fly is equal to the flight speed.
The McCready indicator is on zero. The
previous average thermal climb was 2,1
m/s.
Examples of polar curve from 5.4 hang
glider. The McCready indicator with 2 m/s
Average climb rate corresponds to a flight
speed of 62 km/h ; it is concordant with the
indicator for the average thermal climb
rate. The speed of best glide is 47 km/h.
One case from experience:
A pilot is crossing a valley at relatively high speed. Due to much sinking air mass there is the
danger that he might not be able to get over the ridge on the other side of the valley. In order
to lose the least amount of height, he will now reduce speed until the McCready indicator
is positioned over zero. (This is corresponding to the speed of best glide). On the anlog
speed scale of the FLYTEC 6030 GPS the indicator for best glide will correspond to the
current speed. (picture on the right side).
If the pilot would reduce speed even more, the McCready indicator would then run into the
negative number range. This is a flight condition that must be avoided, as the pilot loses both
time and unnecessarily also altitude. The FLYTEC 6030 GPS warns acoustically by a deep
tone
with rapid frequency as soon as this flight condition happens. This is mostly the case when
a pilot flies in the zone of best glide and then gets into sinking air. At this point an immediate
reaction is of the essence.
Since every long time flight consists of more or less a sequence of thermalling up and gliding
down, it is basically unimportant whether the gliding speed conforms with the expected climb
in the next thermal or the climb already achieved in the last thermal. In order to give the pilot
an indication about the day specific average climb, the filled double edge in the climb area
of the Analogue Vario displays the average value of the past 10 climbing minutes. This value
is not influenced by the sink rate.
In order to fly travel optimised the speed is to be adjusted in such a way that the McCready
indicator covers the pointer for day specific climb. (see picture on the left side).
Of course deviations at will from this remark are possible and are at the own discretion of the
pilot. As a rather cautious and conservative pilot, I for myself prefer to fly with the McCready
indicator in a centre position between 0 (= best glide) and the displayed value for average climb.
All the functions as described here can be experienced in the simulation mode. Measuring
values such as speed, sink or climb, flight direction and also ground speed can be varied by
the user and their effects on the results can be viewed on the LCD screen.