Cruise
Cruising at MTOM using 75% engine power in ICAO standard atmosphere at an elevation of 500 m
(1650 feet) with aps set to negative position, Virus 912 will provide you with cruise performance as
follows:
Virus Model 912
cruise airspeed (VARIO propeller) 225 km/h (122 kts)
Cruise speed may vary depending on the cruise altitude, gross weight and propeller pitch
setting.
Descent
The rate of descent and by that descent glide path is adjusted using spoilers.
Typical sink rate, with aps set to 2
nd
position and spoilers fully extended, measures
3,5 m/sec at 90 km/h and 4,8 m/sec at 115 km/h.
Virus Model 912
max. sink rate with spoilers extended 5,8 m/sec (1160 fpm)
The glide
The glide is dened as unpowered rightened ight at speed providing best lift over drag ratio or
minimum sink rate.
Should the engine become inoperative in ight, as a result of either intended or unintended action,
and it cannot be restarted, react as follows:
establish rightened ight at the speed providing best lift over drag ratio, if you desire to over-
come greatest distance at reach from initial altitude.
establish rightened ight at speed providing minimum sink rate, if you desire do stay airborne
the longest. 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 out on.
Virus Model 912
minimum sink speed 96 km/h (52 kts)
minimum sink rate (BAM2 prop.) 2,24 m/sec (450 fpm)
minumum sink rate (VARIO prop.) 1,85 m/sec (370 fpm)
best lift/drag ratio speed 110 km/h (59 kts)
best lift over drag ratio (BAM 2 prop.) 1:21
best lift over drag ratio (VARIO prop.) 1:24
lift over drag ratio at 150 km/h (80 kts) (VARIO prop.) 1:14
CAUTION: When the engine fails, especially in climb, the aircraft always loses some 30 meters
(100 feet) of altitude before pilots manage to establish rightened unpowered ight.
Performance
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