Rotax CESSNA 150 Manual page 51

Converted with kit
NS402S with ROTAX 912 S3 and
HOFFMANN HO-V352F/170FQ+10
CRUISE FLIGHT
Normal cruise is performed with an engine power between 55 and 75%. The required settings
to achieve these performance figures at different altitudes and temperatures can be found or
from the performance data in Section V.
The cruise tables in Section V show that greater range and fuel economy can be achieved by
flying at lower power settings and at lower altitudes. Using lower power settings and choosing
the most favorable wind conditions are important factors that should be considered to reduce
fuel consumption on each flight.
The cruise performance table provides the true airspeeds and fuel consumption achievable
when cruising at various altitudes and power settings. This table should be used together with
valid wind information as a guide to determine the most favorable altitude and engine settings
for a given flight
Carburetor icing indicated by unexplained airspeed drop can be eliminated by using full
carburetor pre-heating. After regaining the original speed (pre-heating off), it must be
determined by appropriate trial and error how much the carburetor pre-heating must be used to
prevent ice build-up. The preheated air gives a richer mixture when carburetor heating is used
continuously during cruise flight
FLIGHT IN HEAVY RAIN
Important note
During heavy rain rain, the use of full carburetor heating is recommended. This
eliminates the possibility of an engine stoppage caused by excessive water intake
STALLS
The stall characteristics are conventional in both retracted and extended flaps. When the flaps
are extended, a slight shake of the elevator may occur shortly before stall. The stall warning
horn produces a steady signal 5 to 10 mph before actual stall is reached and remains until the
attitude is changed. Stall speeds for various combinations of flap setting and bank angle are
summarized in Section 5..
Airplane Flight
Manual Cessna F150L
Nr. 160
4-11
Page:
Revision 1