Rev #37
Version 8.0
April 2021
Page 81 of 121
5.7.13.9.4
Flight Recorder
The FLARM’s flight recorder settings can be modified in this menu.
5.7.14
Polar and Glider
5.7.14.1
Polar
The Polar and Glider section allows you to load and edit a set of parameters for your glider’s
polar. You can select from a pre-defined list of most common gliders or create your own
polar.
Select Glider from List
: presents you with an alphabetical list of all the common gliders
and associated polar data. All glider data will be copied from the chosen polar. Verify that
the best glide ratio and minimum sink rate are displayed. To see whether the polar data
matches your glider’s performance, review the MacCready Setting Menu where you can
verify the values.
You can modify the polar by changing coefficients
a
,
b
and
c
. A polar is defined as a
quadratic equation with the parameters a, b, and c.
Use the SeeYou program (Tools->Polar) to calculate coefficients
a
,
b
and
c
for a given
glider’s polar. The program requires three sink points entered at selected speeds (e.g.: 100
km/h, 130 km/h, and 150 km/h). The program will calculate the values of
a
,
b
and
c
, which
should be noted and entered into the LXNAV S8x/S10x.
•
Class
: Options for Touring, Ultralight, World, Twin-seater, Club, 18-meter, 15-meter,
Open, Standard and Unknown are available.
•
A, b, c
: Options can be adjusted or entered for a non-listed glider.
•
Reference load
(wing loading) value represents the value at which the polar was
measured.
•
Reference weight
corresponds to the weight value at which the polar was measured.
Summary of Contents for S10 Series
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