P/N 11934-003
5-5
Cirrus Design
Section 5
SR20
Performance Data
• Expected wind enroute..................................10 Knot Headwind
Landing Conditions:
• Field pressure altitude ................................................ 2000 Feet
•
Temperature ................................................20
°
C (ISA + 10
°
C)
• Field length................................................................. 3000 Feet
Takeoff
The takeoff distance tables, Figure 5-9, show the takeoff ground roll
and horizontal distance to reach 50 feet above ground level. The
distances shown are based on the short field technique.
Conservative distances can be established by reading the tables at
the next higher value of weight, altitude and temperature. For
example, in this particular sample problem, the takeoff distance
information presented for a weight of 3000 pounds, takeoff field
pressure altitude of 2000 feet, and a temperature of 30
°
C should be
used. Using the conservative values results in the following:
• Ground roll ................................................................. 1940 Feet
• Total distance to clear a 50-foot obstacle ................... 2734 Feet
Since the takeoff distance tables are based upon a zero wind
conditions, a correction for the effect of winds must be made. Use the
wind components chart, Figure 5-8 to determine the crosswind and the
headwind (or tailwind) component of the reported winds.
Using the 11-knot headwind component, the following corrections can
be made:
• Correction for headwind (10% for each 12 knots) .............. 9.2%
• Ground roll, zero wind ................................................. 1940 feet
• Decrease in ground roll (1940 feet x 0.092) .................. 178 feet
• Corrected ground roll................................................... 1762 feet
• Total distance to clear a 50-foot obstacle, zero wind... 2734 feet
• Decrease in total distance (2734 feet x 0.092) .............. 252 feet
• Corrected total distance to clear 50-foot obstacle ....... 2482 feet
Corrections for grass runways and sloped runways are also applicable
and should be applied. These corrections are calculated in the same
Reissue A
Summary of Contents for SR20
Page 10: ...1 2 P N 11934 003 Section 1 Cirrus Design General SR20 Intentionally Left Blank Revision A3 ...
Page 22: ...2 2 P N 11934 003 Section 2 Cirrus Design Limitations SR20 Placards 2 21 Revision A6 ...
Page 308: ...9 2 P N 11934 003 Section 9 Cirrus Design Supplements SR20 Intentionally Left Blank Reissue A ...