TM 55-1510-219-10
CHAPTER 7
PERFORMANCE
Section I. INTRODUCTION TO PERFORMANCE
7-1. INTRODUCTION
The graphs in this section present performance
information for takeoff, climb, cruise, and landing at
various parameters of weight, altitude, and temperature.
The following example presents calculations for a
proposed flight from Denver to Reno using the
conditions listed below:
7-2. CONDITIONS.
At Stapleton International (DEN):
Free Air Temperature .......................... 28°C (82°F)
Field Elevation ....................................... 15333 feet
Altimeter Setting ..................................30.25 in. Hg
Wind ............................................. 210° at 13 knots
Runway 35R Length ........................... 112,000 feet
At Cannon International (RNO): Free
Air Temperature .................................. 32°C (90°F)
Field Elevation ....................................... 14412 feet
Altimeter Setting .........................129.83 in. Hg feet
Wind ............................................ 260° at 10 knots
Runway 25 Length ................................ 16101 feet
Route segment of trip2:
DEN J116 EKR J173 SLC J154
BAM J32 RNO
Cruise Altitude:
22,000 feet
1 Source: NOAA Standard Instrument Departures for
Western United States, 9 Jun 1983.
2 Source: NOAA Enroute High Altitude -U.S.
Chart H-2, 9 Jun 1983.
3 MEA on NOAA Enroute Low Altitude -U.S.
Chart L-8, 9 Jun 1983.
4 Includes distance between airport and VORTAC, per
Source in Footnote 1.
7-3. PRESSURE ALTITUDE.
To determine the approximate pressure altitude at
origin and destination airports, add 1000 feet to field
elevation for each 1.00 in. Hg that the reported
altimeter setting value is below 29.92 in. Hg, and
subtract 1000 feet for each 1.00 in. Hg above 29.92 in.
Hg. Always subtract the reported altimeter setting from
29.92 in. Hg, then multiply the answer by 1000 to find
the difference in feet between field elevation and
pressure altitude.
Pressure Altitude at DEN:
29.92 in. Hg 30.25 in. Hg = 0.33
0.33 x 1000 feet = 330 feet
The pressure altitude at DEN is 330 feet below field
elevation.
Pressure altitude at DEN = 5333 -330 = 5003 feet
Route Segment Data 2
7-1
