INTRODUCTION TO PERFORMANCE - TM-1-1510-223-10

TM 1-1510-223-10 7-1. INTRODUCTION TO PERFORMANCE. The graphs and tables in this chapter present performance information for takeoff, climb, flight planning, and landing at various parameters of weight, power, altitude, and temperature. Examples have been presented on performance graphs. The performance data in this chapter is presented for aircraft equipped with Infra Red Reducing Exhaust Stacks and for aircraft equipped with Improved Constant Area Exhaust Stacks. The designator symbol IR identifies text and illustration performance data for the Infra Red Reducing Exhaust Stack configuration. The designator symbol CA identifies text and illustration performance data for the Improved Constant Area Exhaust Stack configuration. Notes have been added (with icons) to some charts to identify some performance differences. Data with no icon applies to both configurations and includes the example text (para. 7-3) and other calibration, correction, conversion, wind component, ice vane, and cruise graphs within this chapter. Refer to the Chapter 7 table of contents beginning on page 7-1 for locations of the required performance information. 7-2. HOW TO USE GRAPHS. 1. All airspeed and references to airspeeds in this chapter are indicated airspeeds unless otherwise noted. 2. A reference line indicates where to begin following the guidelines. Always project to the reference line first, then follow the guidelines to the next item by maintaining the same proportional distance between the guideline above and the guideline below the projected line. For instance, if the projected line intersects the reference line in the ratio of 30% down/70% up between the guidelines, then maintain this same 30%/70% relationship between the guidelines all the way to the next item. 3. The AIRSPEED CALIBRATION NORMAL SYSTEM TAKEOFF GROUND ROLL graph was used to obtain V1 and VR indicated airspeeds (IAS). All other indicated airspeeds were obtained by using the AIRSPEED CALIBRATION NORMAL SYSTEM graph. 4. The associated conditions define the specific conditions from which performance parameters have been determined. They are not intended to be used as instructions; however, performance values determined from charts can only be achieved if the specified conditions exist. 5. The full amount of usable fuel is available for all approved flight conditions. 6. Notes have been provided to approximate performance with the ice vanes extended. The effect will vary, depending upon airspeed, temperature, and altitude. 7-3. EXAMPLES. The following examples present calculations for flight time, block speed, and fuel required for a proposed flight from Billings, Montana, to Casper, Wyoming, at flight level 250, using the conditions listed below, except as noted. The desired takeoff weight is 16,000 pounds, if possible. a. Conditions . At Billings-Logan International (BIL): Free Air Temperature ......................................59F Field Elevation ........................................3649 feet¹ Altimeter Setting ..................................30.07 in. Hg Wind ............................................ 2900 at 15 knots Runway 34 Length ..................................5585 feet¹ Gradient .......................................... 1.9% downhill¹ ¹Source: DOD TERM USLIAAPVO1, 9 JAN 92. Route of Trip: BIL - V19 - CPR Route Segment Data: Table 7-1. Table 7-1. Route Segment Data² ROUTE AVERAGE AVERAGE D I S - WIND AT FAT AT FAT AT ALTIMETER SEG MAGNETIC MAGNETIC TANCE FL 250 FL 250 MEA MEA SETTING MENT COURSE VARIATION NM DIR./KNOTS °C FEET °C IN. HG BIL-SHR 117 15E 91³ 010 /45 -40 8000 0 29.97 SHR-CZI 139 14E 57 350 /65 -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. ³lncludes distance between airport and VORTAC, per DOD US IFR SUPPLEMENT 9 JAN 1992. BT06334 7-4 Change 2