Diamond DA 40, Flight Manual

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DA 40 AFM Mass & Balance
Doc. # 6.01.01-E Rev. 8 01-Dec-2010 Page 6 - 3
NOTE
Refer to Section 1.6 - UNITS OF MEASUREMENT for
conversion of SI units to US units and vice versa.
6.2 DATUM PLANE
The Datum Plane (DP) is a plane which is normal to the airplane’s longitudinal axis and
in front of the airplane as seen from the direction of flight. The airplane’s longitudinal axis
is parallel with the upper surface of a 600:31 wedge which is placed on top of the rear
fuselage in front of the vertical stabilizer. When the upper surface of the wedge is aligned
horizontally, the Datum Plane is vertical. The Datum Plane is located 2.194 meter
(86.38 in) forward of the most forward point of the root rib on the stub wing.
6.3 MASS AND BALANCE REPORT
The empty mass and the corresponding CG position established before delivery are the
first entries in the Mass and Balance Report. Every change in permanently installed
equipment, and every repair to the airplane which affects the empty mass or the empty
mass CG must be recorded in the Mass and Balance Report.
For the calculation of flight mass and corresponding CG position (or moment), the current
empty mass and the corresponding CG position (or moment) in accordance with the Mass
and Balance Report must always be used.
Condition of the airplane for establishing the empty mass:
- Equipment as per Equipment Inventory (see Section 6.5)
- Including brake fluid, lubricant (7.6 liter = 8 qts), plus unusable fuel (4 liter = approx.
1 US gal).