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On July 1, 1997 our Chief Pilot Enzo De Blasio successfully
took to the air in its maiden flight the P92 SEASKY, the amphibian
version of the P92 Echo. The name SEASKY actually dates back to
the 60's when a precursor of today's ultralight enjoyed its share
of success. The new SEASKY was flown over the Castel Volturno airfield
and waterfront and was subjected to numerous landings on both land
and water that demonstrated the craft's excellent characteristics.
The program for this complex aircraft, that further extends the
spectrum of TECNAM products, was launched during the Sun & Fun
airshow of 1996 when experts from North and South America approached
TECNAM for the possibility of adapting the P92 (for its inherently
suited configuration and flight characteristics) to amphibian role.
One of the crucial design elements was the choice
of floats among those readily available on the market. After careful
evaluation, the FULL LOTUS inflatable keel design by same name Canadian
manufacturer was selected; among its numerous qualities we list
the following: outstanding ability to absorb and withstand impact;
low weight, strong resistance to damage from dragging and puncture;
buoyancy safety insured by eight sealed compartments per float;
low hydrodynamic drag of air tunnel keel; possibility of hard-surface
emergency landings; ease of on-site repairs.
These same floats may be equipped with four-wheel
landing gear: two main wheels forward at CG location and two smaller
wheels at the aft ends of floats. The smaller wheels are connected
to two rudders for water maneuvering and the entire apparatus is
controlled by the pedal bar insuring optimal control in both water
and land. Flexibility of floats and supporting structure assures
sufficient energy absorption during landing.
The wheel's steel legs are retracted with forward
movement above the waterline by pneumatic actuators controlled via
an electro-pneumatic device. Wheels can be lowered also if pneumatic
system fails. The entire system is governed by a lever that mechanically
disengages the apparatus and by an electric switch located centrally
on dashboard. The wide doors of the P92 allow for easy access to
float covers for mooring operations. The structure of the P92 is
not subjected to any particular alteration except for an extensive
anticorrosion treatment.
The tail fin balances the effects of floats on lateral-directional
stability. The aircraft's excellent flying qualities such as stall
behavior, stability and maneuverability are not varied. The engine
(Rotax 912) remains unchanged; propeller diameter is increased and
its pitch decreased. Thanks to the low weight of LOTUS floats and
considering the elimination of the standard spring leaf main gear
and nose gear, the Echo's weight is increased by nearly 30 kg for
the floatplane version and by nearly 50 kg for the amphibian version.
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