L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL
Do - L 23. 1012.5
2.Directions for the balance chart use
See FIG.6-1 on Page 6-4, Line 0.
.
.
Make a dot on the Empty Sailplane Center of Gravity Range
corresponding with the value shown on the Balance Record on page
6 - 5. When the wing tip extensions are used, move the center of gravity
of the empty sailplane 1% MAC in aft direction. Draw a vertical down
to Line 1. The intersection of the vertical and Line 1 is Point A.
-
Next, use Scale 1 at the top of the chart. Measure the distance from 0
on that scale to a number corresponding with the weight of the front
pilot + par ballast seat (if used). Transfer this distance from
Point A to the left, draw a vertical, and mark the intersection with Line
2 as Point B.
-
Next, use Scale 2. Measure the distance from 0 on that scale to a
number corresponding with the weight of the rear pilot + parachute.
Transfer this distance from Point B to the left, draw a vertical, and mark
the intersection with Line 3 as Point C.
-
Next, use Scale 3 for any changes in the front instrument panel.
Measure the distance from 0 on that scale to a number corresponding
with the weight of any instrument added or removed. Transfer this
distance from Point C to the left (if an instrument is added), to the right
(if removed). Draw a vertical, and mark the intersection with Line
4
as
Point D.
-
Next, use Scale 4 for any changes in the rear instrument panel in the
same fashion as in the previous paragraph. That is how you arrive at
point E. Draw a vertical on down to the lower part of the chart.
-
Now, use the weight scale on the lower left part of the balance chart.
Mark the sum of all weights: Empty sai front pilot + parachute
+ ballast seat + rear pilot + par instrument c
baggage.
-
Draw a horizontal line from the mark to the right. The center of gravity
position is at the intersection of this horizontal line with the vertical
from Point E.
-
If this intersection is inside the slanted shape, the glider is loaded
correctly. If the intersection is outside, the glider has to be reloaded.
Note:
The baggage weight is to include any battery, oxygen
bottle, water bottle etc.Items in the baggage compartment
have no influence on the centre of gravity position, but they
must be included to the sum of all the weights.
Dec 1/93
6 - 3
