SCHEMPP-HIRTH FLUGZEUGBAU GmbH, KIRCHHEIM/TECK
Ventus-3M „Performance“
FLIGHT MANUAL
March 2019
Revision –
6.2.1
6.2
Weight and balance record and permitted payload range
The following loading chart, see sections 6.2.2 and 6.2.3, show, besides other
data, the empty weight, the maximum and minimum Ioad on the seats and the
maximum payload in the fuselage.
These charts are established with the aid of the last valid weighing report - the
required data and diagrams are found in the Maintenance Manual of the Ventus-
3M.
Both loading charts (weight & balance log sheets) are only applicable for this
particular aircaft, the serial number of which is shown on the title page.
6.2.1
Seat load of less than the required minimum
There are two procedures to compensate a seat load of less than the required
minimum.
o
Ballast by means of lead or sand cushions in the pilot seat
The ballast (lead or sand cushion) must be attached firmly to the lap belt
mounting brackets. The ballast weight is added to the payload in the seat.
o
Ballast by means of Lead plates (optional)
A trim ballast mounting provision is provided in the fuselage nose forward of the
rudder pedal assembly. The ballast mounting provision holds up to three (3)
lead plates with a weight of 2.0 kg (4.4 kb) each and allows a reduction of the
minimum seat load indicated on the cockpit placards as shown in the following
table:
Number of lead plates
Difference to
the minimum load
1
- 4.2 kg
- 9.3 lb
2
- 8.4 kg
- 18.5 lb
3
- 12.6 kg
- 27.8 lb
Lever arm of trim ballast plates: 1800 mm (5.90 ft) ahead of datum.
Important note:
Be aware that, even when using trim plates, it is not allowed to fall below the
minimum flight mass (see page 2.6). It is only allowed to use as many plates,
that the absolute value of the difference to the minimum shown in the table
above, added to the real mass in the seat, does not exceed 105 kg (231 lb).
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