Sinus 912 LSA Glider 550 MTOW
www.pipistrel.eu
REV. 3
Cruise
Aircraft at MTOM, recommended cruise power of 5300 RPM at 15°C / 59°F at sea level altitude, flaps
set to negative position (-5 degrees):
Sinus
912 LSA
cruise airspeed
110 kts
Best economy cruising level is 7500 ft . There, cruise performance is equivalent or better than above
due to IAS-TAS relation, but fuel consumption is lower.
At these parameters the fuel burn is 2.9 US gal (11.2l) per hour. For detailed fuel consumption deter-
mination for various cruising regimes consult the Rotax 912 UL Operators manual.
Descent
Typical sink rate, with flaps set to 2
nd
position and airbrakes fully extended, measures 880 fpm
(4.4 m/h) at 50 kts (92 km/h) and 1160 fpm (5.8 m/s) at 60 kts (110 km/h).
Sinus
912 LSA
max. sink rate with airbrakes extended at 90 km/h
(48 kts
), full flaps
880 fpm (4.4 m/s)
sink rate at 50 kts
(92 km/h)
, no airbrakes, full flaps
240 fpm (1.2 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
for the longest time. This may come in handy in case you will be forced to give way to other aircraft
or if you simply need time to determine the most appropriate site to land on.
Sinus
912 LSA
minimum sink speed
48 kts (88 km/h)
minimum sink rate
220 fpm (1.1 m/s)
best lift/drag ratio speed
51 kts (95 km/h)
best lift over drag ratio (propeller un-feathered)
24:1
best lift over drag ratio (propeller feathered)
27:1
lift over drag ratio at 80 kts (150 km/h) (propeller feathered)
18:1
CAUTION:
If the engine fails, especially in climb, the aircraft always loses some 30 meters
(100
feet)
of altitude before reaching best glide speed in wings-level unpowered flight.
5-5
Performance
Содержание Sinus 912 LSA LSA-GLIDER
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