Amendment to Flight and Operations Manual of ATEC 321 Faeta UL aircraft - Aerotow
ATEC v.o.s. Libice nad Cidlinou, Czech Republic
Page 2 of 8
1.1
General
UL aircraft type Atec 321 Faeta is a certified UL aircraft for towing gliders according to
UL-2 regulation, appendix III. For this purpose the aircraft is equipped with special
technical systems which enables towing. This includes towing gear, which consists of
TOST E85 release mechanism, tow shackle with which the release mechanism is
attached to the aircraft, the rope release yellow lever in the cockpit and monitoring
facilities. The monitoring of towed glider can be assured by two methods - using usual
rear mirror on left side of the cockpit or monitoring by camera by which the glider is
displayed on the screen of the device installed on the dashboard.
The Rotax 912S UL engine with maximum power of 73,5 kW when 5800 rpm and max.
continuous power of 69 kW when 5500 rpm serves as towing drive unit. The aircraft
is equipped with 3-blades Fiti EcoCompetition fix propeller of 1,63m diameter. As to
assure engine cooling more efficient, the additional oil radiator including
independent NACA inlet and oil circuit thermostat is installed on engine.
The fuel circuit consists of two independent fuel pumps. The main one with
mechanical pump and the other one parallel back-up electric pump with independent
inlet to fuel tank. Fuel circuit pressure is measured by fuel pressure gauge behind
each pump. In case of failure of any pump, a failure is indicated as pressure decrease
on fuel pressure indicator. The aircraft is fully airworthy on maximum engine
performance with both pumps running simultaneously or with any of pumps single
run. In the main fuel circuit is check valve installed.
The aircraft is equipped with continuous electronic monitoring system of rotations,
temperatures and fuel pressures. In case of monitored limits are exceeded, the values
on instrument are highlighted in red and additional red warning light on switchboard
is switched-on to be well visible and noticed by the pilot. All flight and engine
instruments are situated in a visual field of pilot.
Watching the glider in a rear mirror
simultaneously with flight and engine instruments do not cause any difficulties to the
pilot.
The pilot of towing aicraft is obliged to be appropriately authorized and skilled in
gliders towing. No other particular skills are required.
Each aerotow is performed at own risk of each person on board of the glider.
