Use Of Performance Charts; Sample Problem - Rotax CESSNA 150 Manual

Converted with kit
NS402S with ROTAX 912 S3 and
HOFFMANN HO-V352F/170FQ+10
5 PERFORMANCE
INTRODUCTION
Performance data charts on the following pages are presented so that you may know what to
expect from the airplane under various conditions, and, to facilitate the planning of flights in
detail and with reasonable accuracy. The data in the charts has been computed from actual
flight tests with the airplane and engine in good condition and using average piloting
techniques.
It should be noted that the performance information in the range and endurance charts do not
include fuel reserves. Cruise fuel flow values are based on normal engine settings. Some
indeterminable variables such as engine mixture, fuel metering characteristics, engine and
propeller condition, and air turbulence may account for variations of 10% or more. Therefore, it
is important to utilize all available information to estimate the fuel required for the particular
flight.

USE OF PERFORMANCE CHARTS

Performance data is presented in tabular or graphical form to illustrate
the effect of different variables. Sufficiently detailed information is provided in the tables so that
conservative values can be selected and used to determine the performance figure with
reasonable accuracy.

SAMPLE PROBLEM

The following example uses values from various tables and charts in this section to define the
performance values for a typical flight.
AIRPLANE CONFIGURATION
• Takeoff weight ................................................ 692kg
• Usable fuel ..................................................... 85ltr. (22.5 US gal)
TAKEOFF CONDITIONS
• Field pressure altitude .................................... 1500ft
• Temperature ................................................... 28°C (16°C above STD)
• Wind component along the RWY .................... 12 kts Headwind
• Field length ..................................................... 1067m
Fig. 5 - 4 should be used to determine the takeoff distance. For example, in this sample
problem, the take-off distance information presented for a pressure altitude of 4000 feet and a
temperature of ISA + 22°C should be used and results in the following:
Ground roll:
Takeoff distance
Airplane Flight
Manual Cessna F150L
387m
770m
Nr. 160
5-1
Page:
Revision 1