when you see the symbol effic. Press
to switch between effic/goto. To change this
parameter, you go to the submenu and press
, choose parameter n.21 and
press . The value starts to flash.
Use
or
to change the value shown in seconds from 1 to 30 and press
. The
default value is 3.
See the paragraph “Customize your VL100” to learn how to record your own
polar or use the preloaded polars. We confirm you the importance of this funciton;
the accuracy of many other functions depends on the polar, especially that one of
your aircraft. To realize the polar of your aircraft, it’s necessary to recorder data
(horizontal speed and sink rate) about some flights. You should fly in calm air
conditions, with lapse rate as much as possible like standard (0,65 °C/100 mt).
More exactly your own polar will be, more exactly the related functions will be and
so more satisfying your future flights.
According to the theory popularized by McCready, this value should be set on to
the average climb rate expected in the next thermal. The average over the whole
thermal must take into account the process of entering and centering the lift. This
is shown on the analogue display by a fixed arrow on the left of the screen. To
adjust the McCready value, go to the n.15
parameter, submenu setup, and
press
the value starts to flash. Change the value from +40 to -40 m/sec using
or
and press
to memorize the selected value. To come back at multifunction
display press
key and ten press
key.
This value indicates the equivalent McCready value, using the actual relative wind
speed as optimal Speed to Fly (STF, see paragraph 3.8).
This value is shown on the analogue display by an arrow, on the letf of the screen
(valid values go from 1 to 10). To change this value, go to the n. 16
parameter, submenu setup, and press
the value starts to flash; change the value
using
or
and press
to memorize the value. To come back at multifunction
display press
key, and then press
key.
The Speed to Fly is the optimum flying speed to obtain the best glide ratio over the
ground. This value depends on performance of your aircraft as well as vertical and
horizontal air flow.
In calm air conditions, the optimum flying speed is the same as the best glide
speed (point B)
3.6 Polar
3.7 McCready
Equivalent McCready
3.8 Speed To Fly
(only speed sensor)
(only speed sensor)
(only speed sensor)
(only speed sensor)
mcr
mcre
.
Pag.14
