HOAC AUSTRIA
7.2.
AIRFRAME
DV 20 Flight Manual
Description
The GFRP-fuselage is of semi-monocoque construction. The fire protection cover on the fire wall is
made from a special fire retarding fleece, that is covered by a stainless steel plate on the engine side.
The main bulkhead is of CFRP/GFRP construction.
The GFRP-instrument panel permits the installation of instruments up to a maximum mass (weight) of
1 7 kg (37.5 Ibs)
The GFRP-wings are of semi-monocoque sandwich construction, and contain a CFRP-spar. The
ailerons and flaps are made from CFRP and are attached to the wings using aluminum hinges.
The wing-fuselage connection is made with three bolts each.
The so-called A- and 8- bolts are fixed to the fuselage's root rib. The A-bolt is placed in front of the
spar tunnel, the 8-bolt lies near the trailing edge.
The two main bolts are placed in the middle of the spar tunnel (main bulkhead). They are accessible
between the backrests and can be inserted from the front side. A spring loaded hook locks both bolt
handles, thereby securing them.
The rudder and elevator units are of semi-monocoque sandwich construction. The vertical stabilizer
contains a folded-top antenna for the radio equipment, the horizontal stabilizer contains a antenna for
the NAV equipment (VOR).
7.3.
FLIGHT CONTROLS
The ailerons and elevator are actuated via push rods, and the rudder is controlled using control
cables. The flaps have three positions (cruise [UP], take-Off [T/O], and landing [LDG]) and are
electrically operated. The switch is located on the instrument panel. In addition the flap control circuit
is provided with a manually triggerable circuit breaker.
Elevator forces may be balanced using a trim tab on the elevator.
Revision No.
Reference
Date
October 20, 1 993
Page
7 - 2