Table 7-1. Route Segment Data2

TM 1-1510-224-10 Altimeter Setting ..................................... 30.07 in. Hg Wind .................................................. 290 at 15 knots Runway 34 Length......................................5585 feet¹ Gradient ................................................ 9% downhilll¹ ¹Source: DOD TERM USLIAAPVO1, 9 JAN 92. Route of Trip: BIL - V19 - CPR Route Segment Data: Table 7-1. At Natrona County International (CPR): Free Air Temperature.......................................... 68F Field Elevation ............................................5348 feet⁴ Altimeter Setting ..................................... 29.27 in. Hg Wind .................................................330 at 10 knots Runway 30 Length......................................8686 feet⁴ Gradient ...................................................... 0.3% up⁴ ⁴Source: DOD TERM USLIAPV03, 9 JAN 92. b. Fahrenheit to Celsius Temperature Conversion. Convert reported field temperatures at the departure and destination airports from Fahrenheit to Celsius using the Fahrenheit to Celsius Temperature Conversion graph (fig. 7-9). Enter the chart at the appropriate value on the F scale, read up to the reference line and left to the corresponding value in C. Billings-Logan International 59F...................... 15C Natrona County International 68F ................... 20C c. Pressure Altitude. To determine the approximate pressure altitudes 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 1000 feet for each 1.00 in. Hg above 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 BIL: 29.92 -30.07 -0.15 -0.15 x 1000 feet = -150 feet Field Elevation ............................................. 3649 feet Pressure Altitude Correction ..........................-150 feet Field Pressure Altitude ................................. 3499 feet Pressure Altitude at CPR: 29.92 -29.27 +0.65 0.65 x 1000 feet = 650 feet Field Elevation ............................................. 5348 feet Pressure Altitude Correction ......................... +650 feet Field Pressure Altitude ................................. 5998 feet d. Wind Components. Determine the headwind (tailwind) and crosswind component for the selected runway. Compute the angle between the reported wind at Billings-Logan International of 290 and the selected runway heading of 340 to be 50. Locate the line for 50 angle between wind direction and flight path on the graph. Trace along the 50 line and locate the reported wind speed of 15 knots (the point midway between the 10 and 20 knot wind speed lines). Read left to obtain the headwind component and down to obtain the crosswind component. Headwind Component ................................... 10 knots Crosswind Component .................................. 12 knots Table 7-1. Route Segment Data2 ROUTE SEG- MENT AVERAGE MAGNETIC COURSE AVERAGE MAGNETIC VARIATION DIS- TANCE NM WIND AT FL 250 DIR.IKNOTS FAT AT FL 250 °C MEA FEET FAT AT MEA °C ALTIMETER SETTING IN. HG BIL-SHR 117 15E 91³ 010/45 -40 8000 0 29.97 SHR-CZI 139 14E 57 35065 -40 9000 -4 29.60 CZI-CPR 161 13E 69³ 310/50 -30 7600 0 29.48 ²Source: DOD Low Altitude Enroute Chart L-9, 9 Jan 1992. ³Includes distance between airport and VORTAC, per DOD US IFR SUPPLEMENT, 9 JAN 1992. BT06334 7-10