Pipistrel 890 AT 912 LSA, Руководство по эксплуатации для пилотов и дополнение к учебнику по летной подготовке

Страница: 50 / 96

ALPHA Trainer
www.pipistrel-aircraft.com
REV. 0
POH-162-00-40-050
5-6
Performance
Descent
Reference sink rate, with flaps set to (+2) position measures 440 fpm (2.2 m/s) at 50 kts (92 km/h),
power idle.
ALPHA Trainer ALPHA Trainer
Sink rate at 50 kts
(92 km/h)
- flaps (+2) 440 fpm (2.2 m/s )
The glide
The glide is defined as unpowered wings-level flight at speed providing best lift over drag ratio
or minimum sink rate.
Should the engine become inoperative in flight, as a result of either intended or unintended actions,
and it cannot be restarted, react as follows:
Establish wings-level flight at the speed providing best lift over drag ratio,
if you desire to glide
the greatest distance from a given altitude.
Establish wings-level flight at speed providing minimum sink rate , if you desire do stay airborne
the longest. This may come in handy when you’re forced to give way to other aircraft or if you simply
need time to determine the most appropriate site to land out on.
ALPHA Trainer ALPHA Trainer
Minimum sink speed
58 kts (108 km/h)
Minimum sink rate, flaps (0) 460 fpm (2.3 m/s)
Best lift/drag ratio speed
64 kts (118 km/h)
Best lift over drag ratio , flaps (0) 15:1
CAUTION:
If the engine fails, especially in climb, the aircraft always loses some 100 feet (30
meters) of altitude before reaching best glide speed in wings-level unpowered flight.
Landing performance
Final approach speed should always be 55 kts (102 km/h) with full flaps. Landing runway length may
also vary depending on the elevation, gross weight, touchdown velocity, wind direction and how ag-
gressive the braking action is.
The landing roll measures 410 feet (125 meters) in the following conditions: aircraft at MTOM, airport
at sea level and wind calm. Should you be flying solo, the length shortens by another 30 feet (10 me-
t
ers)
.
Total landing distance over 50 ft / 15 m obstacle measures 1510 feet (460 m).
Landing roll increases by 10 % for every 2000 ft increase in density altitude.
Total landing distance increases by 2% for every 2000 ft increase in density altitude.
CAUTION!
Minimum recommended runway length for approaches is 500 m
(1640 feet)
with no
obstacles inside the 3 deg glide slope area and runway heading in order ensure safe flying activity.
Use of shorter strips should be considered a major exception and requires a lot of skill, heavy use
of slipping until the last moment before touchdown and is performed at own risk.