Section 5
Columbia 400 (LC41-550FG)
Performance
Initial Issue of Manual: November 10, 2004
RC050002
Latest Revision Level/Date: -/11-10-2004
5-31
TIME, FUEL, AND DISTANCE FOR CRUISE DESCENT
The table below, Figure 5 - 31, has information to assist the pilot in estimating cruise descent
times, fuel used, and distance traveled from cruise altitude to sea level or to the elevation of the
destination airport. For descents from cruise altitude to sea level, locate the cruise altitude for the
descent rate in use, and read the information directly. These data are determined for a weight of
3600 lb. (1633 kg), flaps up, 2600 RPM, standard temperature, and zero winds.
For example, a descent at 500 FPM from 9000 feet to sea level will take approximately 18
minutes (50 – 32 = 18), consume 5 gallons of fuel (14 - 9 = 5), and 57 miles (175 – 118 = 57)
will be traveled over the ground under no wind conditions. For descent from cruise altitude to a
field elevation above seal level, subtract the performance data numbers for the field elevation
data from the cruise altitude.
Pressure
Altitude
Descent
Speed KIAS
Rate of
Descent FPM
Fuel Flow
GPH (LPH)
Time
Min
Fuel Used
Gal. (L)
Distance
NM
25000
159
500
19.0 (72.0)
0.0
0 (0)
0
24000
160
500
18.8 (71.2)
2.0
1 (4)
8
23000
161
500
18.6 (70.4)
4.0
1 (4)
16
22000
161
500
18.3 (69.3)
6.0
2 (8)
24
21000
162
500
18.1 (68.5)
8.0
2 (8)
32
20000
163
500
17.9 (67.8)
10.0
3 (11)
39
19000
164
500
17.7 (67.0)
12.0
4 (15)
47
18000
164
500
17.4 (65.9)
14.0
4 (15)
54
17000
165
500
17.2 (65.1)
16.0
5 (19)
62
16000
166
500
17.0 (64.3)
18.0
5 (19)
69
15000
167
500
17.0 (64.3)
20.0
6 (23)
76
14000
167
500
17.0 (64.3)
22.0
7 (26)
83
13000
168
500
17.0 (64.3)
24.0
7 (26)
90
12000
169
500
17.0 (64.3)
26.0
8 (30)
97
11000
170
500
17.0 (64.3)
28.0
8 (30)
104
10000
170
500
17.0 (64.3)
30.0
9 (34)
111
9000
171
500
16.8 (63.6)
32.0
9 (34)
118
8000
172
500
16.7 (63.2)
34.0
10 (38)
124
7000
173
500
16.5 (62.5)
36.0
10 (38)
131
6000
173
500
16.3 (61.7)
38.0
11 (42)
137
5000
174
500
16.2 (61.3)
40.0
12 (45)
144
4000
175
500
16.0 (60.6)
42.0
12 (45)
150
3000
176
500
16.0 (60.6)
44.0
13 (49)
157
2000
177
500
16.0 (60.6)
46.0
13 (49)
163
1000
178
500
16.0 (60.6)
48.0
14 (53)
169
0
179
500
16.0 (60.6)
50.0
14 (53)
175
Figure 5 - 31