DIAMOND AIRCRAFT
DA 20/100 Flight Manual
Weight & Balance
Doc # 202-100-VLA
20 December, 2000
Page
DOT-Approved
6 - 3
6.2. AIRPLANE
WEIGHING
Pre-weighing conditions:
- equipment must be in accordance with the airplane equipment list
- brake fluid, lubricant (3.17 US qt / 3 liters), coolant (2.64 US qt / 2,5 liters) and
unusable fuel (0.53 US gal./ 2 liters), included
To determine the empty weight and the empty weight CG position, the airplane is to be positioned in the
above mentioned pre-weighing condition, with the nose gear and each main gear on a scale. Ensure the
aircraft is level longitudinally as illustrated on the weighing report (see figure 6.1).
With the airplane correctly positioned, a plumb line is dropped from the leading edge of each wing at the
root rib to the floor, join these two points to determine the reference datum (RD). From this line use a
suspended plumb line aligned with each landing gear to measure the distances D
N
(nose gear), D
L
(left
main gear) and D
R
(right main gear).
The following formulas apply:
Empty Weight:
W
T
= W
N
+ W
L
+ W
R
lbs [kg]
Empty Weight Moment:
M = W
N
x D
N
+ W
L
x D
L
+ W
R
x D
R
in
⋅
lbs [m
⋅
kg]
Empty Weight CG position :
=
Empty Weight Moment
Empty Weight
M
W
T
=
in [m]
CAUTION
Items ahead of RD are considered to have a negative lever arm.
Items aft of RD are considered to have a positive lever arm.
Record the data in the Weighing Report included at the end of this chapter.
The following
Sample Weighing Report figure 6.1 is for reference only.
