2 - Schempp-Hirth

SCHEMPP-HIRTH FLUGZEUGBAU GmbH., KIRCHHEIM/TECK
Ventus-2a MAINTENANCE MANUAL
Ventus-2b
6.4 Empty mass and empty mass c/g position
a) Empty mass
The basic empty mass of a “Ventus-2a” or “Ventus-2b” is the sailplane
• without pilot
• without parachute and
• without water ballast
but including all its fixed equipment.
b) Empty mass center of gravity
It must always be ensured that the empty mass center of gravity remains
within the permitted range.
If necessary, compensating ballast weights must be installed.
If the empty mass c/g limits (see diagram on page 6.4.3) and the load
limits on the seat (see load chart) are complied with, the center of gravity
in flight will remain within the permitted range.
The empty mass c/g ranges shown in the diagram on page 6.4.3 are
derived from the following seat loads:
Forward c/g limits: With a maximum seat load of 110 kg (242.5 lb)
and with maximum permitted water ballast
Rearward c/g limits: With various minimum seat loads, and a baggage
load of 2.0 kg (4.4 lb)
To facilitate the checking of the empty mass center of gravity, the table
on page 6.4.2 shows – at different empty mass values – the maximum
permissible load on the tail wheel (or skid), with various seat loads and
in relation to the most rearward c/g position.
The actual load on the tail wheel (or skid) is determined with the aircraft
in weighing attitude, i.e. main wheel on the ground and tail jacked up as
described on page 6.2.1.
If the load on the tail wheel (or skid) does not exceed the corresponding
value in the table, the center of gravity is within the permitted range.
January 2003
Revision 11 TN-No. 349-27 6.4.1